Exhaust Heat Exchanger Exhaust Bypass Valve A Control Circuit High

Where it lives

For P237E, the part to look at first is the valve named here.

Check these first

• A short to voltage on the bypass valve A control circuit
• A failed bypass valve A actuator motor
• Mechanical binding holding the valve A actuator
• A broken valve A return spring

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 voltage
3. Inspect the valve A linkage for binding
4. Check the valve A return spring
5. Replace the exhaust bypass valve A actuator if the circuit tests good
6. Clear the code and retest

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