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DTC P2227: BARO Sensor Circuit Range/ Performance Problem

NOTE:
  • Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
  • 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? 

    YES  -Go to step 3.

    NO  -Go to step  7.

  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 (ECT SENSOR 1) above 158 °F (70 °C)
    • A/T in D position (M/T in 4th gear)
    • REL TP SENSOR between 14 deg and 30 deg for 3 seconds
  6. Monitor the OBD STATUS for DTC P2227 in the DTCs MENU with the HDS.

    Does the screen indicate FAILED? 

    YES  -Go to step 7.

    NO  -If the screen indicates PASSED, intermittent failure, the 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 (see UPDATING THE ECM/PCM ), or substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ).
  8. 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.
  9. Test-drive under these conditions:
    • Engine coolant temperature (ECT SENSOR 1) above 158 °F (70 °C)
    • A/T in D position (M/T in 4th gear)
    • REL TP SENSOR between 14 deg and 30 deg for 3 seconds
  10. Check for Temporary DTCs or DTCs with the HDS.

    Is DTC P2227 indicated? 

    YES  -Check for poor connections or loose terminals at the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then go to step  8. If the ECM/PCM was substituted, go to step  1.

    NO  -Go to step 11.

  11. Monitor the OBD STATUS for DTC P2227 in the DTCs MENU with the HDS.

    Does the screen indicate PASSED? 

    YES  -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see ECM/PCM REPLACEMENT  ). If any other Temporary DTCs or DTCs were indicated in step  10, go to the indicated DTCs troubleshooting.

    NO  -If the screen indicates FAILED, check for poor connections or loose terminals at the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then go to step  8. If the ECM/PCM was substituted, go to step  1. If the screen indicates NOT COMPLETED, go to step  8.

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