DTC Troubleshooting

DTC Troubleshooting: P2227

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 Initial Inspection and Diagnostic Overview.
- 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 to ON (II), and wait 2 seconds.

2. Check the BARO SENSOR in the DATA LIST with the HDS.

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

YES -

Go to step 3.

NO -

Go to step 13.

3. Clear the DTC with the HDS.

4. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) 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)
- Transmission in D
- REL TP SENSOR between 12 and 26 degrees 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. Turn the ignition switch to LOCK (0).

8. Check the intake air system for clogging or restrictions (foreign materrial, dirty air cleaner element, etc.).

Is the intake air system clogged or restricted?

YES -

Remove the clog or restriction, then go to step 9.

NO -

Go to step 13.

9. Turn the ignition switch to ON (II).

10. Reset the PCM with the HDS.

11. Do the PCM idle learn procedure PCM Idle Learn Procedure.

12. Check for Pending or Confirmed DTCs with HDS.

Is DTC P2227 indicated?

YES -

Check for poor connections or loose terminals at the PCM, then go to step 1.

NO -

Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.�

13. Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM Initial Inspection and Diagnostic Overview.

14. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.

15. Test-drive under these conditions:

- Engine coolant temperature (ECT SENSOR 1) above 158 °F (70 °C)
- Transmission in D
- REL TP SENSOR between 12 and 26 degrees for 3 seconds

16. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P2227 indicated?

YES -

Check for poor connections or loose terminals at the PCM. If the PCM was updated, substitute a known-good PCM Initial Inspection and Diagnostic Overview, then go to step 14. If the PCM was substituted, go to step 1.

NO -

Go to step 17.

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

Does the screen indicate PASSED?

YES -

If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM Service and Repair. If any other Pending or Confirmed DTCs were indicated in step 16, go to the indicated DTC's troubleshooting.�

NO -

If the screen indicates FAILED, check for poor connections or loose terminals at the PCM. If the PCM was updated, substitute a known-good PCM Initial Inspection and Diagnostic Overview, then go to step 14. If the PCM was substituted, go to step 1. If the screen indicates NOT COMPLETED, go to step 14.