Evap System (v6) Acura TSX II

Scheme 22

DTC P0443: EVAP Canister Purge Valve Circuit Malfunction

Special Tools Required

Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000A or equivalent, commercially available

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

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1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.
4. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0443 indicated? YES -Go to step 5 . NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the EVAP canister purge valve and the PCM.
5. Turn the ignition switch to LOCK (0), and allow the engine to cool to below 140°F (60°C).
6. Disconnect the vacuum hose (A) from the purge joint (B) in the engine compartment, and connect a vacuum pump/gauge, 0-30 inHg, to the hose.
7. Start the engine, and let it idle. Is there vacuum? YES -Go to step 8 . NO -Go to step 14 .
8. Turn the ignition switch to LOCK (0).
9. Disconnect the EVAP canister purge valve 2P connector.
10. Check for continuity between EVAP canister purge valve 2P connector terminal No. 1 and body ground. Is there continuity? YES -Go to step 11 . NO -Go to step 23 .
11. Jump the SCS line with the HDS.
12. Disconnect PCM connector C (49P).
13. Check for continuity between EVAP canister purge valve 2P connector terminal No. 1 and body ground. Is there continuity? YES -Repair short in the wire between the EVAP canister purge valve and the PCM (C40), then go to step 24 . NO -Go to step 30 .
14. Turn the ignition switch to LOCK (0).
15. Disconnect the EVAP canister purge valve 2P connector.
16. Turn the ignition switch to ON (II).
17. Measure the voltage between EVAP canister purge valve 2P connector terminal No. 2 and body ground. Is there battery voltage? YES -Go to step 18 . NO -Repair open in the wire between the EVAP canister purge valve and the No. 7 ACG (15 A) fuse in the driver's under-dash fuse/relay box, then go to step 24 .
18. Turn the ignition switch to LOCK (0).
19. Jump the SCS line with the HDS.
20. Disconnect PCM connector C (49P).
21. Check for continuity between PCM connector terminal C40 and EVAP canister purge valve 2P connector terminal No. 1. Is there continuity? YES -Go to step 22 . NO -Repair open in the wire between the EVAP canister purge valve and the PCM (C40), then go to step 24 .
22. At the valve side, measure the resistance between EVAP canister purge valve 2P connector terminals No. 1 and No. 2. Is there about 23-26 ohms at room temperature? YES -Go to step 30 . NO -Go to step 23 .
23. Replace the EVAP canister purge valve (see «EVAP CANISTER PURGE VALVE REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ).
24. Reconnect all connectors.
25. Turn the ignition switch to ON (II).
26. Reset the PCM with the HDS.
27. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-v6__pcm-idle-learn-procedure) ).
28. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0443 indicated? YES -Check for poor connections or loose terminals at the EVAP canister purge valve and the PCM, then go to step 1 . NO -Go to step 29 .
29. Monitor the OBD STATUS for DTC P0443 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 28 , go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the EVAP canister purge valve and the PCM, then go to step 1 . If the screen indicates EXECUTING or OUT OF CONDITION, keep idling until a result comes on.
30. Reconnect all connectors.
31. Update the PCM if it does not have the latest software (see «PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-v6__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-v6__substituting-the-pcm) ).
32. Start the engine, and let it idle.
33. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0443 indicated? YES -Check for poor connections or loose terminals at the EVAP canister purge valve and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-v6__substituting-the-pcm) ), then go to step 32 . If the PCM was substituted, go to step 1 . NO -Go to step 34 .
34. Monitor the OBD STATUS for DTC P0443 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-v6__pcm-replacement) ). If any other Pending or Confirmed DTCs were indicated in step 33 , go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the EVAP canister purge valve and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-v6__substituting-the-pcm) ), then go to step 32 . If the PCM was substituted, go to step 1 . If the screen indicates EXECUTING or OUT OF CONDITION, keep idling until a result comes on.

DTC P0451: FTP Sensor Circuit Range/Performance Problem

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). If DTC P2422 is stored at the same time as DTC P0451, troubleshoot DTC P2422 first, then recheck for DTC P0451.

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine, and let it idle for 1 minute.
4. Monitor the OBD STATUS for DTC P0451 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 5 . NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor and the PCM. If the screen indicates NOT COMPLETED, keep idling until a result comes on.
5. Turn the ignition switch to LOCK (0).
6. Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ).
7. Turn the ignition switch to ON (II).
8. Reset the PCM with the HDS.
9. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-v6__pcm-idle-learn-procedure) ).
10. Start the engine, and let it idle for 1 minute.
11. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0451 indicated? YES -Check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1 . NO -Go to step 12 .
12. Monitor the OBD STATUS for DTC P0451 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 11 , go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.

DTC P0452: FTP Sensor Circuit Low Voltage

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

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1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0).
4. Remove the fuel fill cap.
5. Turn the ignition switch to ON (II).
6. Check the FTP SENSOR in the DATA LIST with the HDS. Is about -7.3 kPa (-2.16 inHg, -55 mmHg), or 0.3 V or less indicated? YES -Go to step 10 . NO -Go to step 7 .
7. Install the fuel fill cap.
8. Start the engine.
9. Monitor the OBD STATUS for DTC P0452 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 10 . NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor and the PCM. If the screen indicates NOT COMPLETED, keep idling until a result comes on.
10. Turn the ignition switch to LOCK (0).
11. Disconnect the FTP sensor 3P connector.
12. Turn the ignition switch to ON (II).
13. Check the FTP SENSOR in the DATA LIST with the HDS. Is about -7.3 kPa (-2.16 inHg, -55 mmHg), or 0.3 V or less indicated? YES -Go to step 20 . NO -Go to step 14 .
14. Measure the voltage between FTP sensor 3P connector terminal No. 1 and body ground. Is there about 5 V? YES -Go to step 24 . NO -Go to step 15 .
15. Turn the ignition switch to LOCK (0).
16. Jump the SCS line with the HDS.
17. Disconnect PCM connector A (49P).
18. Connect FTP sensor 3P connector terminal No. 1 to body ground with a jumper wire.
19. Check for continuity between PCM connector terminal C11 and body ground. Is there continuity? YES -Go to step 32 . NO -Repair open in the wire between the PCM (C11) and the FTP sensor, then go to step 26 .
20. Turn the ignition switch to LOCK (0).
21. Jump the SCS line with the HDS.
22. Disconnect PCM connector A (49P).
23. Check for continuity between FTP sensor 3P connector terminal No. 2 and body ground. Is there continuity? YES -Repair short in the wire between the PCM (A39) and the FTP sensor, then go to step 26 . NO -Go to step 32 .
24. Turn the ignition switch to LOCK (0).
25. Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ).
26. Reconnect all connectors.
27. Turn the ignition switch to ON (II).
28. Reset the PCM with the HDS.
29. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-v6__pcm-idle-learn-procedure) ).
30. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0452 indicated? YES -Check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1 . NO -Go to step 31 .
31. Monitor the OBD STATUS for DTC P0452 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 30 , go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.
32. Reconnect all connectors.
33. Update the PCM if it does not have the latest software (see «PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-v6__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-v6__substituting-the-pcm) ).
34. Start the engine, and let it idle.
35. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0452 indicated? YES -Check for poor connections or loose terminals at the FTP sensor and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-v6__substituting-the-pcm) ), then go to step 34 . If the PCM was substituted, go to step 1 . NO -Go to step 36 .
36. Monitor the OBD STATUS for DTC P0452 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-v6__pcm-replacement) ). If any other Pending or Confirmed DTCs were indicated in step 35 , go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-v6__substituting-the-pcm) ), then go to step 34 . If the PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.

DTC P0453: FTP Sensor Circuit High Voltage

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

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1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0).
4. Remove the fuel fill cap.
5. Turn the ignition switch to ON (II).
6. Check the FTP SENSOR in the DATA LIST with the HDS. Is about 7.3 kPa (2.16 inHg, 55 mmHg), or 4.7 V or more indicated? YES -Go to step 10 . NO -Go to step 7 .
7. Install the fuel fill cap.
8. Start the engine.
9. Monitor the OBD STATUS for DTC P0453 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 10 . NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor and the PCM. If the screen indicates NOT COMPLETED, keep idling until a result comes on.
10. Turn the ignition switch to LOCK (0).
11. Disconnect the FTP sensor 3P connector.
12. Connect FTP sensor 3P connector terminals No. 2 and No. 3 with a jumper wire.
13. Turn the ignition switch to ON (II).
14. Check the FTP SENSOR in the DATA LIST with the HDS. Is about 7.3 kPa (2.16 inHg, 55 mmHg), or 4.7 V or more indicated? YES -Go to step 15 . NO -Go to step 26 .
15. Measure the voltage between FTP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES -Go to step 21 . NO -Go to step 16 .
16. Turn the ignition switch to LOCK (0).
17. Jump the SCS line with the HDS.
18. Disconnect PCM connector C (49P).
19. Connect FTP sensor 3P connector terminal No. 3 to body ground with a jumper wire.
20. Check for continuity between PCM connector terminal C15 and body ground. Is there continuity? YES -Go to step 34 . NO -Repair open in the wire between the PCM (C15) and the FTP sensor, then go to step 28 .
21. Turn the ignition switch to LOCK (0).
22. Jump the SCS line with the HDS.
23. Disconnect PCM connector A (49P).
24. Connect FTP sensor 3P connector terminal No. 2 to body ground with a jumper wire.
25. Check for continuity between PCM connector terminal A39 and body ground. Is there continuity? YES -Go to step 34 . NO -Repair open in the wire between the PCM (A39) and the FTP sensor, then go to step 28 .
26. Turn the ignition switch to LOCK (0).
27. Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ).
28. Reconnect all connectors.
29. Turn the ignition switch to ON (II).
30. Reset the PCM with the HDS.
31. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-v6__pcm-idle-learn-procedure) ).
32. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0453 indicated? YES -Check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1 . NO -Go to step 33 .
33. Monitor the OBD STATUS for DTC P0453 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 32 , go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.
34. Reconnect all connectors.
35. Update the PCM if it does not have the latest software (see «PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-v6__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-v6__substituting-the-pcm) ).
36. Start the engine, and let it idle.
37. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0453 indicated? YES -Check for poor connections or loose terminals at the FTP sensor and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-v6__substituting-the-pcm) ), then go to step 36 . If the PCM was substituted, go to step 1 . NO -Go to step 38 .
38. Monitor the OBD STATUS for DTC P0453 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-v6__pcm-replacement) ). If any other Pending or Confirmed DTCs were indicated in step 37 , go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-v6__substituting-the-pcm) ), then go to step 36 . If the PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.

DTC P0455: EVAP System Large Leak Detected; DTC P0456: EVAP System Very Small Leak Detected

Note. The fuel system is designed to allow specified maximum vacuum and pressure conditions. Do not deviate from the vacuum and pressure tests as indicated in these procedures. Excessive pressure/vacuum would damage the EVAP components or cause eventual fuel tank failure.

Special Tools Required

Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000A or equivalent, commercially available

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). Fresh fuel has a higher volatility that will create greater pressure/vacuum. The optimum condition for testing is less than a full tank of fresh fuel. If possible, to assist in leak detection, add 1 gallon of fresh fuel to the tank (as long as it will not fill the tank), just before starting these procedures.

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1. Check the fuel fill cap (the cap must say TIGHTEN TO CLICK). It should turn 1/4 turn after it's tight, then it clicks. Is the correct fuel fill cap installed and properly tightened? YES -Go to step 2 . NO -Replace or tighten the cap, then go to step 29 .
2. Check the fuel fill cap seal (A) and the fuel fill pipe mating surface (B). Verify that the fuel fill cap tether cord (C) is not caught under the cap. Is the fuel fill cap seal missing or damaged, is the fuel fill pipe damaged, or is the tether cord caught under the cap? YES -Replace the fuel fill cap or the fuel fill pipe, then go to step 29 . NO -Go to step 3 .
3. Turn the ignition switch to ON (II).
4. Clear the DTC with the HDS.
5. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, the EVAP canister vent shut valve, and the PCM. NO -Go to step 6 .
6. Turn the ignition switch to LOCK (0).
7. Check for a poor connection or damage at the fuel tank vapor recirculation tube. Is the tube OK? YES -Go to step 8 . NO - Replace the fuel tank vapor recirculation tube, then go to step 28 . If needed, replace the fuel tank (see «FUEL TANK REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/fuel-system/#fuel-supply-system-v6) ), then go to step 28 .
8. Disconnect the fuel tank vapor recirculation tube (A) and the fresh air hose (B) from the EVAP canister (C), and plug the EVAP canister ports (D).
9. Disconnect the vacuum hose (engine side) (A) from the EVAP canister purge valve (B) in the engine compartment, and connect a vacuum pump/gauge, 0-30 inHg, to the purge valve as shown.
10. Turn the ignition switch to ON (II).
11. Select EVAP PCS ON in the INSPECTION MENU with the HDS.
12. Apply vacuum to the hose until the FTP reads 1.90 V (-0.59 inHg, -15.1 mmHg). NOTE: Be careful not to exceed the specified vacuum. If you do, the FTP sensor can be damaged.
13. Select EVAP PCS OFF in the INSPECTION MENU with the HDS, then remove the vacuum pump from the purge valve.
14. Monitor the FTP SENSOR in the DATA LIST for 1 minute with the HDS, and remove the vacuum pump from the purge valve. Does the voltage increase more than 0.2 V (0.1 inHg, 0.5 mmHg)? YES -Go to step 15 . NO -Go to step 16 .
15. Reconnect the vacuum hose (engine side) to the EVAP canister purge valve.
16. Disconnect the vacuum hose (EVAP canister side) (A) from the EVAP canister purge valve (B) in the engine compartment, and connect the vacuum pump/gauge to the vacuum hose as shown.
17. Apply vacuum to the hose until the FTP reads 1.90 V (-0.59 inHg, -15.1 mmHg). NOTE: Be careful not to exceed the specified vacuum. If you do, the FTP sensor can be damaged.
18. Monitor the FTP SENSOR in the DATA LIST for 1 minute with the HDS. Does the voltage increase more than 0.2 V (0.1 inHg, 0.5 mmHg)? YES -Go to step 19 . NO -Replace the EVAP canister purge valve (see «EVAP CANISTER PURGE VALVE REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ), then go to step 28 .
19. Check for a loose or damaged EVAP canister purge line between the EVAP canister and the EVAP canister purge valve. Is the line OK? YES -Replace these parts, then go to step 29 : FTP sensor O-ring EVAP canister vent shut valve case and O-ring EVAP canister NO -Reconnect or repair the EVAP canister purge line, then go to step 28 .
20. Reconnect the fresh air hose (A) to the EVAP canister (B).
21. Reconnect the vacuum hose (engine side) to the EVAP canister purge valve.
22. Disconnect the vacuum hose (EVAP canister side) (A) from the EVAP canister purge valve (B) in the engine compartment, and connect the vacuum pump/gauge to the purge valve as shown.
23. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
24. Apply vacuum to the EVAP system until the FTP reads 1.90 V (-0.59 inHg, -15.1 mmHg). NOTE: Be careful not to exceed the specified vacuum. If you do, the FTP sensor can be damaged.
25. Monitor the FTP SENSOR in the DATA LIST for 1 minute with the HDS. Does the voltage increase more than 0.2 V(0.1 inHg, 2.5 mmHg)? YES -Replace the EVAP canister vent shut valve (see «EVAP CANISTER VENT SHUT VALVE REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ), then go to step 28 . NO -Go to step 26 .
26. Select EVAP CVS OFF in the INSPECTION MENU with the HDS.
27. Check these parts for looseness or damage: Fuel fill pipe Fuel vapor return pipe Are the parts OK? YES -Check the fuel tank unit base gasket (see «FUEL TANK UNIT REMOVAL AND INSTALLATION»(/acura/tsx/ii-2008-2014/remont/fuel-system/#fuel-supply-system-v6__fuel-tank-unit-removal-and-installation) ), and check the fuel tank, then go to step 28 . NO -Repair or replace the damaged parts, then go to step 28 .
28. Reconnect all hoses and connectors.
29. Turn the ignition switch to ON (II).
30. Reset the PCM with the HDS.
31. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-v6__pcm-idle-learn-procedure) ).
32. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Troubleshooting is complete. NO -Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, the EVAP canister vent shut valve, and the PCM, then go to step 1 .

DTC P0457: EVAP System Leak Detected/Fuel Fill Cap Loose or Missing

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

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1. Check the fuel fill cap (the cap must say TIGHTEN TO CLICK). It should turn 1/4 turn after it's tight, then it clicks. Is the correct fuel fill cap installed and properly tightened? YES -Go to step 2 . NO -Replace or tighten the cap, then go to step 20 .
2. Check the fuel fill cap seal (A) and the fuel fill pipe mating surface (B). Verify that the fuel fill cap tether cord (C) is not caught under the cap. Is the fuel fill cap seal missing or damaged, is the fuel fill pipe damaged, or is the tether cord caught under the cap? YES -Replace the fuel fill cap or the fuel fill pipe, then go to step 20 . NO -Go to step 3 .
3. Turn the ignition switch to ON (II).
4. Clear the DTC with the HDS.
5. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM. NO -Go to step 6 .
6. Turn the ignition switch to LOCK (0).
7. Remove the EVAP canister vent shut valve from the EVAP canister (see «EVAP CANISTER VENT SHUT VALVE REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ).
8. Connect the 2P connector to the EVAP canister vent shut valve.
9. Turn the ignition switch to ON (II).
10. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
11. Check the EVAP canister vent shut valve (A) operation. Does the valve operate? YES -Go to step 18 . NO -Go to step 12 .
12. Turn the ignition switch to LOCK (0).
13. Replace the EVAP canister vent shut valve (see «EVAP CANISTER VENT SHUT VALVE REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ).
14. Turn the ignition switch to ON (II).
15. Reset the PCM with the HDS.
16. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-v6__pcm-idle-learn-procedure) ).
17. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Troubleshooting is complete. NO -Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM, then go to step 1 .
18. Check the EVAP canister vent tube. Is there any damage or blockage? YES -Remove the blockage, and replace the EVAP canister vent tube if needed, then go to step 19 . NO -Do the DTC P0456 troubleshooting (see «DTC P0455: EVAP SYSTEM LARGE LEAK DETECTED; DTC P0456: EVAP SYSTEM VERY SMALL LEAK DETECTED»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6__dtc-p0455-evap-system-large-leak) ).
19. Reinstall the EVAP canister vent shut valve.
20. Turn the ignition switch to ON (II).
21. Reset the PCM with the HDS.
22. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-v6__pcm-idle-learn-procedure) ).
23. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Troubleshooting is complete. NO -Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM, then go to step 1 .

DTC P0496: EVAP System High Purge Flow Detected

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, the EVAP canister vent shut valve, and the PCM. NO -Go to step 4 . NOTE: If the test could not be completed because of another DTC, do the troubleshooting for that DTC.
4. Turn the ignition switch to LOCK (0).
5. Replace the EVAP canister purge valve (see «EVAP CANISTER PURGE VALVE REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ).
6. Turn the ignition switch to ON (II).
7. Reset the PCM with the HDS.
8. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-v6__pcm-idle-learn-procedure) ).
9. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Troubleshooting is complete. NO -Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, the EVAP canister vent shut valve, and the PCM, then go to step 1 .

DTC P0497: EVAP System Low Purge Flow Detected

Special Tools Required

1. Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000A or equivalent, commercially available
2. Vacuum/Pressure Gauge, 0-4 inHg 07JAZ-001000B

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 47

Scheme 48

Scheme 49

Scheme 50

Scheme 51

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Select EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the EVAP canister purge valve, the FTP sensor, and the PCM. NO -Go to step 4 .
4. Turn the ignition switch to LOCK (0).
5. Check for a poor connection, a blockage, or damage at the EVAP canister purge line between the throttle body and the EVAP canister. Is the line OK? YES -Go to step 6 . NO -Reconnect or repair the EVAP canister purge line, then go to step 24 .
6. Disconnect the vacuum hose (A) from the EVAP canister purge valve (B).
7. Disconnect the vacuum hose (A) from the purge line (at the EVAP canister side), then connect a T-fitting (B), a vacuum gauge, and a vacuum pump/gauge, 0-30 inHg, to the hose as shown.
8. Turn the ignition switch to ON (II).
9. Apply about 2 kPa (0.6 inHg, 15 mmHg) of vacuum to the hose.
10. Select EVAP PCS ON in the INSPECTION MENU with the HDS. Does the vacuum release immediately? YES -Go to step 15 . NO -Go to step 11 .
11. Select EVAP PCS OFF in the INSPECTION MENU with the HDS.
12. Disconnect the vacuum hose (A) from the EVAP canister purge valve (B). Connect the T-fitting (C), the vacuum gauge, and the vacuum pump/gauge to the EVAP canister purge valve as shown.
13. Apply about 2 kPa (0.6inHg, 15 mmHg) of vacuum to the purge valve.
14. Select EVAP PCS ON in the INSPECTION MENU with the HDS. Does the vacuum release immediately? YES -Check for a blockage in the vacuum hose between the EVAP canister purge valve and the EVAP canister, then go to step 24 . NO -Replace the EVAP canister purge valve (see «EVAP CANISTER PURGE VALVE REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ), then go to step 24 .
15. Connect the vacuum pump/gauge to the vacuum hose (A) as shown.
16. Start the engine, and let it idle. Is there vacuum? YES -Go to step 17 . NO -Check for a blockage in the vacuum hose between the EVAP canister purge valve and the intake manifold, then go to step 24 .
17. Turn the ignition switch to LOCK (0).
18. Remove the FTP sensor with its connector connected (see «FTP SENSOR REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ).
19. Connect the T-fitting (A), the vacuum pump/gauge, 0-30 inHg, and the vacuum pump to the FTP sensor (B) as shown.
20. Turn the ignition switch to ON (II).
21. Check and record the FTP SENSOR reading in the DATA LIST with the HDS.
22. Slowly apply about 1.3 kPa (0.4 inHg, 10 mmHg) of vacuum to the hose.
23. Check the FTP SENSOR in the DATA LIST with the HDS. Does the value change? YES -Check for debris or a blockage at the EVAP canister port, then go to step 24 . NO -Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ), then go to step 24 .
24. Turn the ignition switch to ON (II).
25. Reset the PCM with the HDS.
26. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-v6__pcm-idle-learn-procedure) ).
27. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Troubleshooting is complete. NO -Check for poor connections or loose terminals at the EVAP canister purge valve, the FTP sensor, and the PCM, then go to step 1 .

DTC P0498: EVAP Canister Vent Shut Valve Circuit Low Voltage

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 52

Scheme 53

Scheme 54

Scheme 55

Scheme 56

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0498 indicated? YES -Go to step 6 . NO -Go to step 4 .
4. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
5. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0498 indicated? YES -Go to step 6 . NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the EVAP canister vent shut valve and the PCM.
6. Turn the ignition switch to LOCK (0).
7. Disconnect the EVAP canister vent shut valve 2P connector.
8. Turn the ignition switch to ON (II).
9. Measure the voltage between EVAP canister vent shut valve 2P connector terminal No. 2 and body ground. Is there battery voltage? YES -Go to step 10 . NO -Repair open in the wire between the EVAP canister vent shut valve and the PGM-FI subrelay, then go to step 18 .
10. Turn the ignition switch to LOCK (0).
11. At the valve side, measure the resistance between EVAP canister vent shut valve 2P connector terminals No. 1 and No. 2. Is there about 25-30 ohms at room temperature? YES -Go to step 12 . NO -Go to step 17 .
12. Jump the SCS line with the HDS.
13. Disconnect PCM connector A (49P).
14. Check for continuity between PCM connector terminal A22 and body ground. Is there continuity? YES -Repair short in the wire between the EVAP canister vent shut valve and the PCM (A22), then go to step 18 . NO -Go to step 15 .
15. Connect EVAP canister vent shut valve 2P connector terminal No. 1 to body ground with a jumper wire.
16. Check for continuity between PCM connector terminal A22 and body ground. Is there continuity? YES -Go to step 25 . NO -Repair open in the wire between the EVAP canister vent shut valve and the PCM (A22), then go to step 18 .
17. Replace the EVAP canister vent shut valve (see «EVAP CANISTER VENT SHUT VALVE REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ).
18. Reconnect all connectors.
19. Turn the ignition switch to ON (II).
20. Reset the PCM with the HDS.
21. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-v6__pcm-idle-learn-procedure) ).
22. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
23. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0498 indicated? YES -Check for poor connections or loose terminals at the EVAP canister vent shut valve and the PCM, then go to step 1 . NO -Go to step 24 .
24. Monitor the OBD STATUS for DTC P0498 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 23 , go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the EVAP canister vent shut valve and the PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 22 .
25. Reconnect all connectors.
26. Update the PCM if it does not have the latest software (see «PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-v6__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-v6__substituting-the-pcm) ).
27. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
28. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0498 indicated? YES -Check for poor connections or loose terminals at the EVAP canister vent shut valve and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-v6__substituting-the-pcm) ), then go to step 27 . If the PCM was substituted, go to step 1 . NO -Go to step 29 .
29. Monitor the OBD STATUS for DTC P0498 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-v6__pcm-replacement) ). If any other Pending or Confirmed DTCs were indicated in step 28 , go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the EVAP canister vent shut valve and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-v6__substituting-the-pcm) ), then go to step 27 . If the PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, go to step 27 .

DTC P0499: EVAP Canister Vent Shut Valve Circuit High Voltage

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
4. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0499 indicated? YES -Go to step 5 . NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the EVAP canister vent shut valve and the PCM.
5. Update the PCM if it does not have the latest software (see «PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-v6__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-v6__substituting-the-pcm) ).
6. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
7. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0499 indicated? YES -Check for poor connections or loose terminals at the EVAP canister vent shut valve and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-v6__substituting-the-pcm) ), then go to step 6 . If the PCM was substituted, go to step 1 . NO -Go to step 8 .
8. Monitor the OBD STATUS for DTC P0499 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-v6__pcm-replacement) ). If any other Pending or Confirmed DTCs were indicated in step 7 , go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the EVAP canister vent shut valve and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-v6__substituting-the-pcm) ), then go to step 6 . If the PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, go to step 6 .

DTC P1454: FTP Sensor Circuit Range/Performance Problem; DTC P2422: EVAP Canister Vent Shut Valve Stuck Closed Malfunction

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 57

Scheme 58

Scheme 59

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0).
4. Remove the fuel fill cap, and wait 1 minute.
5. Turn the ignition switch to ON (II).
6. Check the FTP SENSOR in the DATA LIST with the HDS. Is it between -0.67 and 0.67 kPa (-0.2 and 0.2 inHg, -5 and 5 mmHg), or 2.4 and 2.6 V? YES -Go to step 7 . NO -Go to step 18 .
7. Install the fuel fill cap.
8. Clear the DTC with the HDS.
9. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.
10. Monitor the OBD STATUS for DTC P1454 and/or P1458 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 11 . NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM. Also check for a blockage in the vent hoses and the drain joint. If the screen indicates NOT COMPLETED, keep idling until a result comes on.
11. Clear the DTC with the HDS.
12. Turn the ignition switch to LOCK (0).
13. Remove the EVAP canister vent shut valve from the EVAP canister (see «EVAP CANISTER VENT SHUT VALVE REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ).
14. Connect the 2P connector to the EVAP canister vent shut valve.
15. Turn the ignition switch to ON (II).
16. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
17. Check the EVAP canister vent shut valve (A) operation. Does the valve operate? YES -Check for a blockage in the EVAP canister, the vent hoses, and the drain joint, then install the EVAP canister vent shut valve, and go to step 24 . NO -Replace the EVAP canister vent shut valve (see «EVAP CANISTER VENT SHUT VALVE REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ), then go to step 24 .
18. Disconnect the air tube (A) from the FTP sensor (B).
19. Check the FTP SENSOR in the DATA LIST with the HDS. Is it between -0.67 and 0.67 kPa (-0.2 and 0.2 inHg, -5 and 5 mmHg), or 2.4 and 2.6 V? YES -Check for a blockage in the FTP sensor air tube or the vent, then reattach the air tube or the vent, then go to step 24 . NO -Go to step 20 .
20. Turn the ignition switch to LOCK (0).
21. Remove the FTP sensor (A) from the EVAP canister with its connector connected (see «EVAP CANISTER VENT SHUT VALVE REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ).
22. Turn the ignition switch to ON (II).
23. Check the FTP SENSOR in the DATA LIST with the HDS. Is it between -0.67 and 0.67 kPa (-0.2 and 0.2 inHg, -5 and 5 mmHg), or 2.4 and 2.6 V? YES -Check for debris or clogging at the EVAP canister and the FTP sensor port, then go to step 24 . NO -Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ), then go to step 24.
24. Turn the ignition switch to ON (II).
25. Reset the PCM with the HDS.
26. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-v6__pcm-idle-learn-procedure) ).
27. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1454 and/or P2422 indicated? YES -Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM, then go to step 1 . NO -Go to step 28 .
28. Monitor the OBD STATUS for DTC P1454 and/or P2422 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 27 , go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM, then go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.

DTC P1458: FTP Sensor Range/Performance Problem

Special Tools Required

Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000A or equivalent, commercially available

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 60

Scheme 61

Scheme 62

Scheme 63

Scheme 64

1. Turn the ignition switch to ON (II).
2. Note the recorded on-board snapshot parameters with the HDS: Max Value of FTP SENSOR Min Value of FTP SENSOR FUEL LEVEL
3. Check the FUEL LEVEL in the DATA LIST with the HDS. Is the FUEL LEVEL less than it is on the on-board snapshot? YES -Go to step 4 . NO -Drain the fuel until the FUEL LEVEL is less than it is on-board snapshot, then go to step 4 .
4. Take a snapshot with the HDS for 3 minutes without starting the engine.
5. Check the recorded snapshot parameters with the HDS: Max Value of FTP SENSOR (FINE) Min Value of FTP SENSOR (FINE) Is the difference between the MAX and MIN values of the FTP SENSOR (FINE) about 0.67 kPa (0.2 inHg, 5 mmHg) or less? YES -Go to step 6 . NO -Go to step 12 .
6. Check the FTP SENSOR (FINE) in the recorded snapshot with the HDS. Does it vary 0.067 kPa (0.02 inHg, 0.5 mmHg) or more for 3 seconds? YES -Go to step 7 . NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM. Also check for a blockage in the EVAP vent hose.
7. Turn the ignition switch to LOCK (0).
8. Remove the FTP sensor.
9. Reconnect the FTP sensor 3P connecter.
10. Turn the ignition switch to ON (II).
11. Check the FTP SENSOR (FINE) in the DATA LIST with the HDS. Does it vary 0.067 kPa (0.02 inHg, 0.5 mmHg) or more for 3 seconds? YES -Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ), then go to step 28 . NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM. Also check for a blockage in the EVAP vent hose.
12. Remove the fuel fill cap.
13. Check the FTP SENSOR (FINE) in the DATA LIST with the HDS. Is the value about 0.67 kPa (0.2 inHg, 5 mmHg) or more, or about -0.67 kPa (-0.2 inHg, -5 mmHg) or less? YES -Reinstall the fuel fill cap, then go to step 22 . NO -Go to step 14 .
14. Turn the ignition switch to LOCK (0).
15. Remove the FTP sensor.
16. Reconnect the FTP sensor 3P connecter.
17. Turn the ignition switch to ON (II).
18. Check the FTP SENSOR (FINE) in the DATA LIST with the HDS. Is the value about 0.67 kPa (0.2 inHg, 5 mmHg) or more, or about -0.67 kPa (-0.2 inHg, -5 mmHg) or less? YES -Remove the blockage in the EVAP vent hose, and replace it if needed, then go to step 26 . NO -Go to step 19 .
19. Turn the ignition switch to LOCK (0).
20. Disconnect the FTP sensor 3P connector.
21. Check for a blockage or damage at the FTP sensor ports (EVAP canister side and vent side). Is there any blockage or damage? YES -Remove the blockage, and replace the FTP sensor if needed (see «FTP SENSOR REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ), then go to step 28 . NO -Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ), then go to step 28 .
22. Turn the ignition switch to LOCK (0).
23. Disconnect the fresh air hose (A) from the EVAP canister (B), then connect a vacuum pump/gauge, 0-30 inHg, to the EVAP vent shut valve as shown.
24. Turn the ignition switch to ON (II).
25. Try to apply vacuum to the valve (not more than 5.3 kPa (1.6 inHg, 40 mmHg)) while checking the FTP SENSOR (FINE) in the DATA LIST with the HDS. NOTE: To avoid damaging the FTP sensor, do not apply more than 5.3 kPa (1.6 inHg, 40 mmHg) of vacuum. Does the valve hold more than 1.3 kPa (0.4 inHg, 10 mmHg) of vacuum? YES -Replace the EVAP canister vent shut valve (see «EVAP CANISTER VENT SHUT VALVE REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ), then go to step 26 . NO -Remove the blockage in the fresh air hose, and replace it if needed, then go to step 26 .
26. Turn the ignition switch to LOCK (0).
27. Reconnect all connectors and the fresh air hose.
28. Turn the ignition switch to ON (II).
29. Reset the PCM with the HDS.
30. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-v6__pcm-idle-learn-procedure) ).
31. Take a snapshot with the HDS for 3 minutes without starting the engine.
32. Check the recorded snapshot parameters with the HDS: Max Value of FTP SENSOR (FINE) Min Value of FTP SENSOR (FINE) Is the difference between the MAX and MIN values of the FTP SENSOR (FINE) about 0.67 kPa (5 mmHg, 0.2 inHg) or less? YES -Troubleshooting is complete. NO -Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM, then go to step 1 .

DTC P145C: EVAP System Purge Flow Malfunction

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). If DTC P145C is indicated alone, do the troubleshooting for DTC P0496 and P0497 using freeze data for P145C. If DTC P0497 and P145C are stored at the same time, check for a poor connection, a blockage, or damage at the EVAP canister purge line between the EVAP canister purge valve and the EVAP canister. Also check for a stuck closed EVAP canister purge valve. If any of DTCs listed below are indicated at the same time as DTC P145C, troubleshoot those DTCs first, then recheck for P145C. P0496, P0497: EVAP system purge flow

Fuel Cap Warning Message System Troubleshooting

Special Tools Required

1. Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000A or equivalent, commercially available
2. Vacuum/Pressure Gauge, 0-4 inHg 07JAZ-001000B

Do this procedure if the fuel cap warning message comes on frequently, or if the message does not go off after the fuel fill cap is tightened and the vehicle is driven several days.

Scheme 65

Scheme 66

1. Check the fuel fill cap (the cap must say TIGHTEN TO CLICK). It should turn 1/4 after it's tight, then it clicks. Is the correct fuel fill cap installed and properly tightened? YES -Go to step 2 . NO -Replace or tighten the cap, then go to step 13 .
2. Check the fuel fill cap seal (A) and the fuel fill pipe mating surface (B). Verify that the fuel fill cap tether cord (C) is not caught under the cap. Is the fuel fill cap seal missing or damaged, is the fuel fill pipe damaged, or is the tether cord caught under the cap? YES -Replace the fuel fill cap or the fuel fill pipe, then go to step 13 . NO -Go to step 3 .
3. Reinstall and tighten the fuel fill cap.
4. Clear the DTC with the HDS.
5. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on, then let it idle for 1 minute.
6. Test drive at 45 mph (72 km/h) for 1 minute or more. Does the fuel fill cap warning message come on? YES -Go to step 7 . NO -Intermittent failure, the system is OK at this time.
7. Turn the ignition switch to LOCK (0).
8. Disconnect the vacuum hose (A) from the EVAP canister purge valve (B) in the engine compartment, then connect a T-fitting (C), a vacuum gauge, and a vacuum pump/gauge, 0-30 inHg, to the EVAP canister purge valve as shown.
9. Turn the ignition switch to ON (II).
10. Apply about 2 kPa(0.6inHg, 15mmHg) of vacuum to the hose.
11. Select the EVAP PCS ON in the INSPECTION MENU with the HDS. Does the vacuum release Immediately? YES -Check for a blockage in the vacuum hose/line between the EVAP canister purge valve and the EVAP canister, then go to step 12 . NO -Replace the EVAP canister purge valve (see «EVAP CANISTER PURGE VALVE REPLACEMENT»(/acura/tsx/ii-2008-2014/remont/auxiliary-emission-control-systems/#evap-system-v6) ), then go to step 12 .
12. Install the parts in the reverse order of removal.
13. Turn the ignition switch to ON (II).
14. Reset the PCM with the HDS.
15. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-v6__pcm-idle-learn-procedure) ).
16. Test-drive at 45 mph (72 km/h) for 1 minute or more. Does the fuel cap warning message come on? YES -Go to step 1 and recheck. NO -Troubleshooting is complete.

Scheme 67

Scheme 68

Scheme 69

Scheme 70

Scheme 71

1. Raise the vehicle on a lift.
2. Remove the wheel sensor harness clamps (A)
3. Support the rear subframe with a transmission jack and a wooden block as shown.
4. Remove the rear subframe mounting bolts (B and C).
5. Lower the transmission jack and the rear subframe about 50 mm. NOTE: Be careful not to damage the connecting parts.
6. Remove the bolt (A), and disconnect the hoses (B), the EVAP canister vent shut valve 2P connector (C), and the FTP sensor 3P connector (D).
7. Remove the bolts (E), then remove the EVAP canister assembly (F).
8. Remove the EVAP canister (A) from the EVAP canister bracket (B).
9. Remove the EVAP canister vent shut valve (A) and FTP sensor (B) from the canister (C).
10. Reassemble the EVAP canister with new O-rings (D), a new retainer (E), and a new cap (F) then install the EVAP canister bracket. NOTE: Do not coat the O-rings with oil.
11. Install the EVAP canister assembly to the body. NOTE: Attach the bracket arm (A) to the body as shown.
12. Install the parts in the reverse order of removal. Use new bolts when you install the rear subframe.
13. Check the wheel alignment (see «WHEEL ALIGNMENT»(/acura/tsx/ii-2008-2014/remont/wheel-alignment/#front-and-rear-suspension-v6__wheel-alignment) ).

Scheme 72

Scheme 73

1. Remove the bolt (A), and disconnect the EVAP canister vent shut valve 2P connector (B), the FTP sensor 3P connector (C), and the hoses (D).
2. Remove the bolts (E), and move the EVAP canister assembly (F) to the rear.
3. Remove the FTP sensor (A).
4. Install the parts in the reverse order of removal with a new O-ring (B) and a new retainer (C).

Scheme 74

1. Disconnect the EVAP canister vent shut valve 2P connector (A).
2. Remove the cap (B).
3. Remove the EVAP canister vent shut valve (C).
4. Install the parts in the reverse order of removal with new O-rings (D) and a new cap. NOTE: Do not coat the O-rings with oil.

Scheme 75

Scheme 76

1. Disconnect the hoses (A) and the EVAP canister purge valve 2P connector (B).
2. Remove the EVAP canister purge valve assembly (C).
3. Remove the EVAP canister purge valve (A) from the bracket (B).
4. Install the parts in the reverse order of removal.

See also:
• GENERAL TROUBLESHOOTING INFORMATION
• PCM IDLE LEARN PROCEDURE
• PCM UPDATE
• SUBSTITUTING THE PCM
• PCM REPLACEMENT
• FUEL TANK REPLACEMENT
• FUEL TANK UNIT REMOVAL AND INSTALLATION
• WHEEL ALIGNMENT
• EVAP CANISTER PURGE VALVE REPLACEMENT
• DTC P0455: EVAP SYSTEM LARGE LEAK DETECTED; DTC P0456: EVAP SYSTEM VERY SMALL LEAK DETECTED