DTC Troubleshooting

DTC P1109: BARO Sensor Circuit Out of Range High

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

1. Reset the PCM with the HDS.
2. Start the engine.
3. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P1109 indicated?

YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time. If any other Temporary DTCs or DTCs are indicated, Go to the indicated DTC's troubleshooting.

4. Update the PCM if it does not have the latest software, or substitute a known good PCM.
5. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P1109 indicated?

YES - If the PCM was updated, substitute a known good PCM, then recheck. If the PCM was substituted, Go to step 1.

NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other Temporary DTCs or DTCs are indicated, Go to the indicated DTC's troubleshooting.