OBD-II Generic Error Code P2308: How to Fix It

Q: Can I drive with error code P2308?

Driving with P2308 is not recommended as it can cause engine misfire, reduced power, and damage to the catalytic converter. Have it diagnosed as soon as possible.

Q: What causes P2308?

Common causes include a faulty ignition coil, damaged spark plug, open or shorted wiring in the coil secondary circuit, or a failing ECM.

Q: How much does it cost to fix P2308?

If you DIY, a coil costs $30-$80 and a spark plug $5-$20. Professional repair ranges from $150 to $300 including labor and diagnostics.

Q: Is P2308 the same as a misfire code?

P2308 often triggers a misfire code like P0303 (cylinder 3 misfire). It specifically points to the ignition coil secondary circuit as the root cause.

Q: Do I need to replace all coils if one fails?

It's a good practice to replace all ignition coils at once if they are high-mileage, but not strictly necessary. However, if one coil fails, others may follow soon.

Abstract

Error code P2308 indicates a problem with the secondary circuit of ignition coil 'C' (the coil for cylinder 3 in a typical firing order). This means the coil is not delivering enough voltage to the spark plug, causing a misfire. The issue could be a faulty coil, damaged wiring, a bad spark plug, or an engine control module (ECM) fault.