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 P0106, P2228, and/or P2229 are stored at the same time as DTC P0101, troubleshoot those DTCs first, then recheck for DTC P0101.
- Check for poor connections or damage to these parts: PCV hose Intake air duct Air cleaner Purge (PCS) line Are the parts OK? YES -Go to step 2. NO -Repair or replace the damaged parts, then go to step 15 .
- Check for damage or looseness of the air duct at the air cleaner. Is it OK? YES -Go to step 3. NO & delta; Reconnect or replace the air duct in the air cleaner, then go to step 15 .
- Check for a dirty air cleaner element. Is it dirty? YES -Replace the air cleaner element (see «AIR CLEANER ELEMENT INSPECTION/ REPLACEMENT»(ref-295016-S42216033992008081400000) ), then go to step 15 . NO -Go to step 4.
- Turn the ignition switch to LOCK (0).
- Turn the ignition switch to ON (II).
- Check the MAF SENSOR in the DATA LIST with the HDS. Is there about 0.2 gm/s or 0.5 V? YES -Go to step 7. NO -Go to step 13 .
- Start the engine.
- Vary the engine speed between 2, 000 RPM and 3, 000 RPM.
- Check the MAF SENSOR in the DATA LIST with the HDS. Does the reading change? YES -Go to step 10. NO -Go to step 13 .
- Hold the engine speed at 3, 000 RPM without load (in P or N) until the radiator fan comes on, then let it idle.
- Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VSS MAP SENSOR MAF SENSOR
- Monitor the OBD STATUS for DTC P0101 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 13. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MAF sensor/IAT sensor and the PCM. If the screen indicates NOT COMPLETED, go to step 11 and recheck.
- Turn the ignition switch to LOCK (0).
- Replace the MAF sensor/I AT sensor (see «MAP SENSOR REPLACEMENT»(ref-351658-S01412024492009122700000) ).
- Turn the ignition switch to ON (II).
- Reset the PCM with the HDS.
- Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-295027-S32794534722008081400000) ).
- Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VSS MAP SENSOR MAF SENSOR
- Check for Temporary DTCs or DTCs with the HDS. Is DTC P0101 indicated? YES -Check for poor connections or loose terminals at the MAF sensor/IAT sensor and the PCM, then go to step 1 . NO -Go to step 20.
- Monitor the OBD STATUS for DTC P0101 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 19 , go to the indicated DTC's troubleshooting. NO -If the screen indicates FAILED, check for poor connections or loose terminals at the MAF sensor/IAT sensor and the PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 18 .