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DTC P1109: BARO Sensor Circuit Out of Range High (2004-2005 models)

NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
  1. Reset the ECM with a scan tool or the HDS.
  2. Start the engine.
  3. Check for Temporary DTCs or DTCs with a scan tool or the HDS.

    Is DTC P1109 indicated? 

    1. YES -  Substitute a known-good ECM (see HOW TO SUBSTITUTE THE ECM FOR TESTING PURPOSES ) and recheck. If the symptom/indication goes away, replace the original ECM (see ECM REPLACEMENT  ).
    2. NO -  Intermittent failure, system is OK at this time.
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