DTC Troubleshooting: P2228 (13)
DTC P2228:
 BARO Sensor Circuit Low Voltage
NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information.
  1. Turn the ignition switch ON (II).
  1. Check the BARO SENSOR in the DATA LIST with the HDS.
Is about 2.2 V or less indicated?
YES -
Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM. ■
NO -
Intermittent failure, the system is OK at this time.■