P04A9 - Exhaust Pressure Control Valve 'B' Position Sensor/Switch Circuit High

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Exhaust Pressure Control Valve 'B' Position Sensor/Switch
  • Exhaust Pressure Control Valve 'B' Position Sensor/Switch harness is open or shorted
  • Exhaust Pressure Control Valve 'B' Position Sensor/Switch circuit poor electrical connection

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P04a9 Description

The Powertrain Control Module (PCM) monitors the Exhaust Pressure Control Valve Position Sensor. The PCM sets the OBDII code when the Exhaust Pressure Control Valve Position Sensor is not to factory specifications.
OBDII Code P04a9 - Exhaust Pressure Control Valve 'B' Position Sensor/Switch Circuit High - AutoCodes.com

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P04A9 Comments

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