Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see DTC TROUBLESHOOTING INDEX ). If DTC P0107, P0108, P1128, and/or P1129 are stored at the same time as DTC P2227, troubleshoot those DTCs first, then recheck for DTC P2227.
- Turn the ignition switch ON (II), and wait 2 seconds.
- Check the BARO SENSOR in the DATA LIST with the HDS. Is about 101 kPa (29.9 in.Hg, 760 mmHg), or about 2.9 V at sea level indicated? YES - Go to step 3. NO - Update the PCM if it does not have the latest software (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-219956-S29187290912006021600000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-219956-S20631232652006021600000) ), then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM (see «PCM REPLACEMENT»(ref-299652-S28764766372008092500000) ).
- Clear the DTC with the HDS.
- Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the radiator fan comes on, then let it idle.
- Test-drive under these conditions: Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C) Transmission in D position Throttle position between 14 degrees and 45 degrees for 2 seconds
- Monitor the OBD STATUS for DTC P2227 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Intermittent failure, the system is OK at this time. NO - If the screen indicates FAILED, go to step 7. If the screen indicates NOT COMPLETED, go to step 5 .
- Check the condition of the air cleaner element. Is the air cleaner element OK? YES - Go to step 8. NO - Replace the air cleaner element (see «DTC TROUBLESHOOTING INDEX»(ref-219956-S26486718892006021600000) ).
- Update the PCM if it does not have the latest software (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-219956-S29187290912006021600000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-219956-S20631232652006021600000) ).
- Reset the PCM with the HDS.
- Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-219960-S21279730262006021600000) ).
- Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the radiator fan comes on, then let it idle.
- Test-drive under these conditions: Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C) Transmission in D position Throttle position between 14 degrees and 45 degrees for 2 seconds
- Check for Temporary DTCs or DTCs with the HDS. Is DTC P2227 indicated? YES - If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-219956-S20631232652006021600000) ), then go to step 11 . If the PCM was substituted, go to step 1 . NO - Go to step 14.
- Monitor the OBD STATUS for DTC P2227 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»(ref-299652-S28764766372008092500000) ). If any other Temporary DTCs or DTCs were indicated in step 13 , go to the indicated DTCs troubleshooting. NO - If the screen indicates FAILED, check for poor connections or loose terminals at the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-219956-S20631232652006021600000) ), then go to step 11 . If the PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, go to step 11 .