DTC Troubleshooting: P1107 (13-1), P1108 (13-2)

DTC P1107 (13-1):  BARO Sensor Circuit Low Voltage
DTC P1108 (13-2):  BARO Sensor Circuit High Voltage

1.Reset the ECM/PCM.

2.Turn the ignition switch ON (II).

Is DTC P1107 or P1108 indicated?

YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original  ECM/ PCM.n

NO - Intermittent failure, system is OK at this time.n