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DTC P2227: BARO Sensor Circuit Range/Performance Problem

NOTE: If DTC P0107, P0108, P1128 and/or P1129 are stored at the same time as DTC P2227, troubleshoot those DTCs first, then recheck for DTC P2227.
  1. Turn the ignition switch ON (II), and wait 2 seconds.
  2. Check the BARO SENSOR in the DATA LIST with the HDS.

    Is about 101 kPa (29.9 in.Hg, 760 mmHg), or about 2.9 V at sea level indicated? 

    1. YES -  Go to step 3.
    2. NO -  Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see ECM/PCM REPLACEMENT  ).
  3. Clear the DTC with the HDS.
  4. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
  5. Test-drive under these conditions:
    • Engine coolant temperature above 176 °F (80 °C)
    • A/T in D position (M/T in 4th gear)
    • Throttle position between 15 degrees and 33 degrees for 3 seconds or more
  6. Monitor the OBD STATUS for DTC P2227 in the DTCs MENU with the HDS.

    Does the screen indicate FAILED? 

    1. YES -  Go to step 7.
    2. NO -  If the screen indicates PASSED, intermittent failure, system is OK at this time. If the screen indicates NOT COMPLETED, go to step  4 and recheck.
  7. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING ).
  8. Reset the ECM/PCM with the HDS.
  9. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
  10. Check for Temporary DTCs or DTCs with the HDS.

    Are any Temporary DTCs or DTCs indicated? 

    1. YES -  If DTC P2227 is indicated, check for poor connections or loose terminals at the ECM/PCM, then go to step  1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
    2. NO -  If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see ECM/PCM REPLACEMENT  ).
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