OBD-II Generic Error Code P0357: How to Fix It

Q: Can I drive with error code P0357?

You can drive short distances, but it may cause engine misfires, reduced power, and potential damage to the catalytic converter. It's best to fix it promptly.

Q: How much does it cost to fix P0357?

DIY cost for a single ignition coil ranges from $30 to $100. If a mechanic replaces it, expect $150–$300 including labor and diagnostic fees.

Q: What other symptoms accompany P0357?

Symptoms include engine misfire, rough idle, hesitation during acceleration, decreased fuel economy, and possibly a flashing check engine light.

Q: Can a bad spark plug cause P0357?

Yes, a faulty spark plug can cause excessive resistance in the secondary circuit, which may trigger a primary circuit code. Always inspect spark plugs when diagnosing ignition coil issues.

Q: What does 'Ignition Coil G Primary Circuit' mean?

It means the ECM has detected an electrical fault in the low-voltage (primary) side of ignition coil G, which controls the spark for one specific cylinder.

Abstract

Error code P0357 indicates a problem with the primary circuit of ignition coil 'G' (the sixth coil in firing order on most vehicles). This means the engine control module (ECM) has detected an electrical fault—such as an open or shorted circuit—in the coil's primary wiring. If left unchecked, it can cause misfires, rough idling, and reduced fuel economy.