P2307
Ignition Coil C Primary Control Circuit High
Ignition system
Generic OBD-II
Medium
What it means
P2307 means the ECM detected high voltage on the primary control circuit for ignition coil C. That coil fires one cylinder, so a circuit fault usually causes a misfire on that cylinder — rough running, lost power, and a lit or flashing check-engine light. The cause is typically the coil itself, its wiring or connector, or the control circuit rather than deeper engine damage.
Medium
Can I keep driving? Driveable but not for long — a dead coil circuit means a misfiring cylinder, which can overheat and damage the catalytic converter.
Common symptoms
What you'll notice
- Check-engine light on (may flash during an active misfire)
- Misfire, rough idle, or shaking
- Hesitation or reduced power on acceleration
- Reduced fuel economy
Common causes
Most likely first
- Ignition coil C primary circuit shorted to voltage or openLikely
- Failed ignition coil CCommon
- Damaged wiring or a corroded connector at the coilCommon
- Poor coil ground or driver-circuit fault in the PCM/ECMLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame and check for companion misfire codes (e.g. P0303) to confirm the cylinder.
- Inspect the coil C connector and wiring for damage, corrosion, or a short to power.
- Swap coil C with a known-good coil and see if the fault follows the coil.
- Test the primary control circuit and ground; replace the coil if it has failed.
- Clear the code and re-test; check the PCM driver only if wiring and coil are good.
FAQ
Quick answers
Is it safe to drive with P2307?+
Only briefly. A misfiring cylinder dumps raw fuel into the exhaust and can ruin the catalytic converter — fix it promptly, especially if the light is flashing.
Can I just clear P2307?+
You can, but it returns quickly until the coil, its wiring, or the control circuit is repaired.
Related codes
Often seen with P2307
Read & clear P2307 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX