Exhaust Pressure Control Valve A Position Sensor/Switch Circuit High

Where it lives

For P048E, the sensor sits on the circuit this code reports. The description of P048E reports a fault at the sensor.

Check these first

• Valve A position sensor signal pulled high
• A short to voltage in the valve A position circuit
• An open signal return at the valve A position sensor
• Corrosion or water in the valve A position connector
• A failed position sensor in valve A

What to do next

1. Inspect the valve A position connector for corrosion
2. Test the valve A position signal wire for a short to voltage
3. Check the valve A position signal return for an open
4. Command valve A and watch the position sensor reply
5. Replace the valve A position sensor if the signal stays high
6. Clear the code and retest

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