DTC Troubleshooting

Control System DTCs

DTC Troubleshooting: P2228

DTC P2228 : BARO Sensor Circuit Low Voltage

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information How To Troubleshoot The Fuel And Emissions Systems.

1. Problem verification:

Problem verification
-1. Turn the ignition switch to ON (II).

-2. Check the BARO SENSOR in the DATA LIST with the HDS.

Is about 53 kPa (15.6 inHg, 397 mmHg), or 1.31 V or less indicated?
-YES- The failure is duplicated. Update the ECM ECM/PCM Update if it does not have the latest software, or substitute a known-good ECM Service and Repair, then do the repair verification.
-NO- Intermittent failure, the system is OK at this time.

Repair verification:

-1. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P2228 indicated?
-YES- Check for poor connections or loose terminals at the ECM. If the ECM was updated, substitute a known-good ECM Service and Repair, then recheck. If the ECM was substituted, go to step 1.
-NO- Troubleshooting is complete. If the ECM was substituted, replace the original ECM Service and Repair. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.