P1109

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 ECM 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.

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

Is DTC P1109 indicated?

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

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