Ignition Coil D Primary Control Circuit High
What does P2307 mean?
The P2307 code means the vehicle's onboard diagnostic system has detected: Ignition Coil D Primary Control Circuit High. This is a moderate severity code.
Common Symptoms
- Cylinder 4 misfire detected
- Check Engine Light illuminated
- Engine rough at idle and under load
- Poor acceleration response
- Increased tailpipe emissions
Probable Causes (Ranked by Likelihood)
- Short in ignition coil D wiring Very High
- Internally shorted ignition coil D High
- Water or oil in spark plug well causing arcing Moderate
- ECM coil driver output shorted high Low
Step-by-Step Diagnostic Procedure
-
Check spark plug well on cylinder 4 for moisture or oil
-
Swap coil D to another cylinder to confirm it is the coil
-
Inspect wiring to coil D for insulation damage
-
Measure coil D resistance values against specification
-
Check valve cover gasket for leaks into plug wells
Frequently Asked Questions
Can I drive with code P2307?
Short distances only. Continued misfiring will damage the catalytic converter and increase emissions.
What causes P2307?
Commonly a failed coil or fluid in the spark plug well. If oil is found in the well, the valve cover gasket and tube seals need replacement.
Is P2307 expensive to fix?
Usually $50 to $400. The coil itself is cheap. If valve cover gasket work is needed, that adds to the total cost.