Exhaust Pressure Control Valve B Range/Performance

Where it lives

For P04A0, start at the valve the description names.

Check these first

• Exhaust pressure control valve B not reaching its commanded position
• A broken or shorted wire in the valve B control circuit
• A clogged exhaust or DPF restricting valve B's range
• A failed valve B actuator motor
• A bad ground or power feed at valve B

What to do next

1. Command exhaust pressure control valve B through its range with a scan tool
2. Inspect the valve B connector for corrosion or water
3. Test the valve B control wires for opens and shorts
4. Check the exhaust and DPF for a restriction
5. Replace exhaust pressure control valve B if it will not move
6. Clear the code and retest

Look up another code