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Home/Acura/RDX/Acura RDX I facelift (2009-2012)/Repair manual/Auxiliary Emission Control Systems/DTC P1458: FTP Sensor Circuit Range/Performance Problem
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DTC P1458: FTP Sensor Circuit Range/Performance Problem Acura RDX I facelift

Auxiliary Emission Control Systems 10 illustrations ~1865 words

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 ). If any of DTCs listed below are indicated at the same time as DTC P1458, troubleshoot those DTCs first, then recheck for P1458. P0451, P0452, P0453, P1454: FTP sensor P2422: EVAP canister vent shut valve Do not start the engine during this troubleshooting.

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Scheme 43: DTC P1458: FTP Sensor Circuit Range/Performance Problem
Scheme 43: DTC P1458: FTP Sensor Circuit Range/Performance Problem

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  1. Turn the ignition switch to ON (II).
  2. Note these recorded on-board snapshot parameters with the HDS: Max Value of FTP SENSOR Min Value of FTP SENSOR FUEL LEVEL HDS on-board snapshot screen
  3. Check the FUEL LEVEL in the DATA LIST with the HDS. Is the FUEL LEVEL less than it is in the on-board snapshot? YES -Go to step 4. NO -Drain the fuel until the FUEL LEVEL is less than it is in the on-board snapshot, then go to step 4.
  4. Take a snapshot with the HDS for 3 minutes without starting the engine.
  5. Check these recorded snapshot parameters with the HDS: Max Value of FTP SENSOR (FINE) Min Value of FTP SENSOR (FINE) HDS snapshot screen 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 (see «FTP SENSOR REPLACEMENT»(ref-513871-S39145912802012111600000) ).
  9. Reconnect the FTP sensor 3P connector.
  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»(ref-513871-S39145912802012111600000) ), 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 (see «FTP SENSOR REPLACEMENT»(ref-513871-S39145912802012111600000) ).
  16. Reconnect the FTP sensor 3P connector.
  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, 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 (see «FTP SENSOR REPLACEMENT»(ref-513871-S39145912802012111600000) ) if needed, then go to step 28 . NO -Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(ref-513871-S39145912802012111600000) ), 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 in illustration.
  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, 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»(ref-513856-S30291526352012111600000) ).
  31. Take a snapshot with the HDS for 3 minutes without starting the engine.
  32. Check these recorded snapshot parameters with the HDS: Max Value of FTP SENSOR (FINE) Min Value of FTP SENSOR (FINE) HDS snapshot screen 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 -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 .

Special Tools Required

  1. Vacuum/Pressure Gauge, 0-4 inHg 07JAZ-001000B
  2. 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. Select 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 and the PCM. NO -Go to step 4.
  4. Check for poor connection, blockage, or damage at the EVAP canister purge line between the EVAP canister purge nozzle and EVAP canister purge valve. Is the hose OK? YES -Go to step 5. NO -Reconnect or repair the EVAP canister purge line, then go to step 22 .
  5. Check for poor connection, blockage, or damage at the hose between EVAP canister purge nozzle and turbocharger bypass valve base. Is the hose OK? YES -Go to step 6. NO -Reconnect or repair the hose, then go to step 22 .
  6. Remove the intake air duct (air flow tube) (see step 20 under «TURBOCHARGER AND EXHAUST MANIFOLD REMOVAL AND INSTALLATION»(ref-513843-S10459103682012111600000) ).
  7. Disconnect the vacuum hose (A) from the EVAP canister purge valve (B).
  8. Disconnect the vacuum hose from the purge line (at the EVAP canister side), then connect a T-fitting (A), a vacuum gauge, and a vacuum pump/gauge, 0-30 inHg, to the hose as shown in illustration.
  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 a T-fitting (C), the vacuum gauge, and the vacuum pump/gauge to the EVAP canister purge valve as shown in illustration.
  13. Apply about 2 kPa (0.6 inHg, 15 mmHg) of vacuum to the hose.
  14. Select EVAP PCS ON in the INSPECTION MENU with the HDS. Does the vacuum release immediately? YES -Check for blockage in the vacuum hose between the EVAP canister purge valve and the EVAP canister, then go to step 22 . NO -Go to step 21 .
  15. Turn the ignition switch to LOCK (0).
  16. Disconnect the hose (A) from the turbocharger bypass control valve base (B), and connect the vacuum pump/gauge to the pressure hose as shown in illustration.
  17. Apply vacuum to the hose. Does it hold vacuum? YES -Repair the hose between the turbocharger bypass control valve base and the EVAP canister purge nozzle, then go to step 22 . NO -Go to step 18.
  18. Disconnect the vacuum hose (A) from the EVAP canister purge nozzle (B), and connect the vacuum pump/gauge to the vacuum hose as shown in illustration.
  19. Apply vacuum to the hose. Does it hold vacuum? YES -Go to step 20. NO -Check for debris or clogging at the EVAP canister purge nozzle port and the turbocharger bypass control valve base port, then go to step 22 .
  20. Inspect non-return valve B (see «NON-RETURN VALVE A/B INSPECTION/REPLACEMENT»(ref-513871-S41682043472012111600000) ). Is the valve OK? YES -Repair the EVAP canister purge line between the EVAP canister purge nozzle and the EVAP canister purge valve, then go to step 22 . NO -Replace non-return valve B, then go to step 22 .
  21. Replace the EVAP canister purge valve (see «EVAP CANISTER PURGE VALVE REPLACEMENT»(ref-513871-S40079898072012111600000) ).
  22. Reconnect all hoses, and reinstall all parts.
  23. Turn the ignition switch to ON (II).
  24. Reset the PCM with the HDS.
  25. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-513856-S30291526352012111600000) ).
  26. Select the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Troubleshooting is complete. NO -Check the EVAP purge control solenoid valve, the EVAP canister purge nozzle and its hose, and the EVAP canister purge line (jet purge line), then go to step 1 .

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. Select the EVAP TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Intermittent failure, the system is OK at this time. NO -Go to step 3.
  3. Replace non-return valve A (see «NON-RETURN VALVE A/B INSPECTION/REPLACEMENT»(ref-513871-S41682043472012111600000) ).
  4. Reset the PCM with the HDS.
  5. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-513856-S30291526352012111600000) ).
  6. Select the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Troubleshooting is complete. NO -Check the EVAP canister purge line, then go to step 1 .

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 from P145C. If DTC P145D is indicated alone, do the troubleshooting for DTC P0496 and P145A using freeze data from P145D. If DTC P0497, P145A, P145C, and P145D stored at the same time, check for poor connection, 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 the DTCs listed below are indicated at the same time as DTC P145C and/or P145D, troubleshoot those DTCs first, then recheck for P145C and/or P145D. P0496, P0497, P145A: EVAP system purge flow

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