P2307

Ignition Coil C Primary Control Circuit High

Q: 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.

Q: Can I just clear P2307?

You can, but it returns quickly until the coil, its wiring, or the control circuit is repaired.

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.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

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.

Read & clear P2307 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX