Engine Controls - MIL ON/DTC's P2135/P0401 Set
01-004/042003 MAZDA6
3.0L MIL ILLUMINATION WITH DTCS P2135 AND/OR P0401
APPLICABLE MODEL(S)/VINS
2003 Mazda6 with 3.0L Engine
DESCRIPTION
Some vehicles may experience MIL illumination with DTCs P2135 and/or P0401 stored in memory.
^ P2135 - Throttle position sensor No.1/No. 2 voltage correlation.
^ P0401 - Exhaust gas recirculation (EGR) flow insufficient detection.
REPAIR PROCEDURE
1. Using WDS B26.9 or later software, reprogram the PCM to the latest calibration (refer to "Calibration Information" table) by following the "Module Reprogramming" procedure.
NOTE:
^ Always update the WDS PTU first, then install the needed calibration file that WDS shows during PCM reprogramming. Go to "WDS Calibration" on ESI and download the "update" file. If the PTU is not updated to the latest WDS calibration level, the calibration file will not install into the PTU.
^ It is not necessary to remove any fuses or relays during PCM reprogramming when the WDS screen prompts you to do so. You may accidentally stop power to one of the PCM terminals and cause the PCM to be blanked, or you may receive error messages during the WDS reprogramming procedure.
^ WDS shows the calibration part numbers after programming the PCM.
^ Please be aware that PCM calibration part numbers and file names listed in any Service Bulletin may change due to future releases of WDS software, and additional revisions made to those calibrations for service related concerns.
^ When reprogramming a PCM, WDS will always display the "latest" calibration P/N available for that vehicle. If any calibration has been revised/updated to contain new information for a new service concern/issue, it will also contain all previously released calibrations.
^ When performing this procedure, if the WDS PTU is not docked and connected to 115V - 120V, we recommend that a battery charger be installed on the vehicle battery and turned ON to a maximum charge of no more than 20 AMPS to keep the vehicle battery up to capacity. If you exceed 20 AMPS, it will damage the WDS PTU.
2. After performing the PCM reprogramming procedure, make sure to perform "Self-Test", ALLCMDTCs and erase any stored DTCs that appear after the reprogramming.
^ If any DTCs should remain after performing DTC erase, diagnose the DTCs according to the appropriate Troubleshooting section of the Workshop Manual.
NOTE:
It is normal for some U**** DTCs and possibly C1119 to be stored after reprogramming modules with WDS. After the DTCs are erased, no DTCs should be present.
3. Place an "Authorized Modification" label (P/N 9999-95-AMDC-97) with the new calibration information on the "A" pillar above the tear tag in the driver doorjamb.
4. Verify repair.
NOTE:
After reprogramming a PCM, it is necessary to road test the vehicle to relearn KAM (Keep Alive Memory) strategy and verify no MIL illumination or DTCs are present.
CALIBRATION INFORMATION
WARRANTY INFORMATION
NOTE:
^ This warranty information applies only to verified customer complaints on vehicles eligible for warranty repair. Refer to the SRT microfiche for warranty term information.
^ Additional diagnostic time cannot be claimed for this repair.