Exhaust Pressure Regulator Vent Solenoid Control Circuit High

Where it lives

For P2171, the solenoid sits on the circuit this code reports. The description of P2171 reports a fault at the solenoid.

Check these first

• A short to voltage in the vent solenoid control circuit
• An open in the vent solenoid control circuit
• A failed exhaust pressure regulator vent solenoid
• A poor connection at the vent solenoid or the ECM
• Damage to the control circuit harness

What to do next

1. Read the vent solenoid control circuit voltage on a scan tool
2. Test the control circuit for a short to voltage
3. Check the vent solenoid connector and the ECM connector
4. Inspect the control circuit harness for damage
5. Replace the exhaust pressure regulator vent solenoid if the circuit tests good
6. Clear the code and retest

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