DTC Troubleshooting: P2228 (13-5), P2229 (13-6)

DTC P2228 (13-5):  BARO Sensor Circuit Low Voltage

1.Reset the ECM/PCM.

2.Turn the ignition switch ON (II).

Is DTC P2228 or P2229 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