Exhaust Heat Exchanger Exhaust Bypass Valve A Control Circuit Low

Where it lives

For P237D, start at the valve the description names.

Check these first

• A short to ground on the bypass valve A control circuit
• A failed bypass valve A actuator motor
• An open in the valve A control wire
• Carbon buildup binding the valve A actuator

What to do next

1. Command exhaust bypass valve A open and closed with a scan tool
2. Test the valve A control circuit for a short to ground
3. Inspect the valve A actuator for carbon binding
4. Check the valve A connector and wiring
5. Replace the exhaust bypass valve A actuator if the circuit tests good
6. Clear the code and retest

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