P0234 CEL | The Focus ST Network Forum

P0234 CEL

Discussion in 'Focus ST Maintenance' started by Blown5Ways, Oct 23, 2013.

  1. Blown5Ways

    Blown5Ways New Member

    Has anyone else had this issue come up?
  2. Steve@Tasca

    [email protected] Team Focus ST Sponsor

    I'd get it in to the dealer right away. This is from an older list of DTCs but seems like it might fit an ST.

    P0234 - Supercharger Overboost Condition The PCM disables (bypasses) the supercharger boost and sets a diagnostic trouble code (DTC) to keep from damaging the powertrain (engine or transmission) during potential harmful operating conditions. Brake torque (brake on and throttle at wide open)
    Transmission oil temperature (TOT) exceeds calibrated threshold
    Engine over temperature
    Ignition misfire exceeds calibrated threshold
    Knock sensor (KS) failure or knock detected
    Low speed fuel pump relay not switching
    Check for other diagnostic trouble codes accompanying the P0234 or check appropriate and available PIDs related to above possible causes.

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