P2227

DTC P2227 BAROMETRIC PRESSURE CIRCUIT RANGE/PERFORMANCE

GENERAL DESCRIPTION
A barometric pressure sensor is installed within the ECM/PCM to permit altitude corrections to be applied to fuel injection quantity calculations.

DTC DESCRIPTION
If the output of ambient pressure sensor is shown abnormal value (refer to DTC Detecting Condition), ECM/PCM sets DTC P2227,

DTC Detecting Condition:

MONITOR SCANTOOL DATA
1. Connect scantool to Data Link Connector (DLC).
2. IG "ON".
3. Select "Diagnostic Trouble Codes (DTCs)" mode, and then Press F4 (DIAL) to check DTC information from the DTCs menu
4. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions noted in the DTC detecting condition.
5. Read "DTC Status" parameter.




6. Is parameter displayed "History (Not Present) fault"??

NOTE:
- History fault: DTC occurred but has been cleared.
- Present fault: DTC is occurring at present time.

YES - The intermittent fault could be caused by
1st. Clog at sensing hole.
2nd. Poor connection of ECM/PCM connector.
3rd. The previous DTC which has not been cleared after repairing.

So, Thoroughly check above items. And, also check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.

NO
- 1st. Check the sensing hole for clog or damage. If there is a problem, repair as necessary.
- 2nd. Substitute with a known-good ECM/PCM and check for proper operation. If the problem is corrected, replace ECM/PCM and then go to "Verification of Vehicle Repair" procedure.

NOTE:
- History fault: DTC occurred but has been cleared.
- Present fault: DTC is occurring at present time.

VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode.
2. Clear the DTCs and Operate the vehicle within DTC Enable conditions in General information.
3. Are any DTCs present?

YES - Go to the applicable troubleshooting procedure.

NO - System is performing to specification at this time.