DTC Troubleshooting

DTC Troubleshooting: 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. Initial Inspection and Diagnostic Overview

1. Reset the ECM/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.


4. Update the ECM/PCM if it does not have the latest software, ECM/PCM Update (A/T) or substitute a known-good ECM/PCM. Initial Inspection and Diagnostic Overview

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

Is DTC P1109 indicated?
YES - If the ECM/PCM was updated, substitute a known-good ECM/PCM, Initial Inspection and Diagnostic Overview then recheck. If the ECM/PCM was substituted, go to step 1.

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