P2227

DTC P2227: BARO Sensor Range/Performance Problem

NOTE:
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
- 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.

1. Turn the ignition switch ON (II), and wait 2 seconds.
2. 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 - Go to step 7.

3. Clear the DTC with the HDS.
4. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle.
5. Test-drive under these conditions:
- ECT SENSOR 1 above 158 degrees F (70 degrees C)
- Transmission in 4th gear
- REL TP SENSOR between 12 degrees and 20 degrees for 2 seconds

6. Monitor the OBD STATUS for DTC P2227 in the DTCs MENU with the HDS.

Does the screen indicate FAILED?

YES - Go to step 7.

NO - If the screen indicates PASSED, intermittent failure, the system is OK at this time. If the screen indicates NOT COMPLETED, go to step 4 and recheck.

7. Update the ECM if it does not have the latest software, or substitute a known-good ECM.
8. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle.
9. Test-drive under these conditions:
- ECT SENSOR 1 above 158 degrees F (70 degrees C)
- Transmission in 4th gear
- REL TP SENSOR between 12 degrees and 20 degrees for 2 seconds

10. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2227 indicated?

YES - Check for poor connections or loose terminals at the ECM. If the ECM was updated, substitute a known-good ECM, then go to STEP 8. If the ECM was substituted, go to step 1.

NO - If no Temporary DTCs or DTCs are indicated, go to step 11. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

11. Monitor the OBD STATUS for DTC P2227 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM.
NO - If the screen indicates FAILED, check for poor connections or loose terminals at the ECM. If the ECM was updated, substitute a known-good ECM, then go to step 8. If the ECM was substituted, go to step 1. If the screen indicates NOT COMPLETED, go to step 8 and recheck.