P04AA Code: Meaning, Causes, and Symptoms | OBD2 Codes

P04AA – Exhaust Pressure Control Valve ‘B’ Position Sensor/Switch Circuit Intermittent/Erratic

 

P04AA Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

P04AA 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

 

P04AA 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.