MIL illumination due to DTC P2262 - Revised diagnosis and repair procedures.
This bulletin applies to vehicle equipped with a Cummins 6.7-liter engine (sales code ETJ). The bulletin supersedes technical service bulletin 09-002-09 dated 5/2/09. This bulletin discusses revised diagnostic and repair procedures for DTC P2262 - Turbocharger Boost Pressure Not Detected - Mechanical. Recent PCM calibration updates have improved the robustness to this DTC through updated diagnostic strategies. As a result, many events which have no adverse affects on drivability, emissions, or reliability will no longer set the P2262 fault.
As a result of recent PCM calibration updates, the proper repair for some P2262 faults is merely to update the calibration, while others will require cleaning or replacing the turbocharger. Scan Tool software includes a P2262 diagnosis test for this purpose. The new P2262 diagnosis test must be used prior to performing any of the following:
Clearing codes
Updating the PCM
Beginning the turbocharger repair.
Based on the outcome of the P2262 diagnosis test, the Scan Tool will provide one of the following as the proper direction for the appropriate repair. Service info and complete the repair as directed:
Update PCM flash calibration to the latest calibration. No repair required to the turbocharger.
Clean the turbocharger.
Update PCM flash calibration to the latest calibration and clean the turbocharger.
Replace the turbocharger.
Update PCM flash calibration to the latest calibration and replace the turbocharger.
Topic: TSB 09-002-09 REV A: MIL illumination due to DTC P2262 (Read 4286 times)