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DTC P1109: BARO Sensor Circuit Out of Range High

  1. Reset the PCM with the HDS.
  2. Start the engine.
  3. Check for Temporary DTCs or DTCs with the HDS.

    Is DTC P1109 indicated? 

    YES  - Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck (see PCM UPDATING AND SUBSTITUTION FOR TESTING ). If the symptom/indication goes away with a known-good PCM, replace the original PCM (see PCM REPLACEMENT  ).

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

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