OBD II Fault Code

  • OBD II P2BA9

    OBD-II Code Diagonostic Trouble Code is defined as a nox Exceedence - Insufficient Reagent Quality

    The purpose of the reductant system (DEF) is to reduce the amount of NOx released by the diesel engine. The engine computer (PCM) uses multiple NOx sensors to confirm the performance of the reductant system. If excessive emissions are detected, the PCM will deactive other systems to prevent additional component damage. Code P2BA9 will be set.Additional codes will be stored. Those codes will need to be diagnosed and repaired.

    Common Problems That Trigger the P2BA9 Code

    • DEF contamination

    Common Repairs Needed for the P2BA9 Code

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