P2314
Ignition Coil E Secondary Circuit
Ignition
Generic OBD-II
Medium
What it means
P2314 means the ECM has detected a fault in the secondary (high-voltage) circuit of ignition coil E — the side that delivers spark to the plug. This usually causes a misfire on that cylinder, with rough running and reduced power. Common causes are a failed coil, a worn spark plug or boot, or arcing in the secondary path.
Medium
Can I keep driving? Drivable but likely misfiring on one cylinder — avoid extended or hard driving, as a sustained misfire can damage the catalytic converter.
Common symptoms
What you'll notice
- Check-engine light on (may flash during an active misfire)
- Rough idle and engine shake
- Hesitation or stumble on acceleration
- Reduced power and rougher running under load
Common causes
Most likely first
- Failed ignition coil ELikely
- Worn or cracked spark plug, boot, or plug wire on that cylinderCommon
- Carbon tracking or arcing in the coil's secondary pathCommon
- Corroded or loose coil connectorLess often
- Excessive spark-plug gap or a fouled plugLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and note any cylinder-specific misfire codes.
- Inspect the spark plug, boot, and (if fitted) plug wire on coil E's cylinder for wear, cracks, or carbon tracks.
- Swap coil E with a neighbouring coil and see whether the fault follows the coil.
- Check the spark plug gap and condition; replace if fouled or worn.
- Replace the coil if it fails testing; otherwise repair the secondary components. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2314?+
Only briefly. A secondary-circuit fault means one cylinder may not be firing, and unburned fuel can overheat and damage the catalytic converter. Fix it soon, especially if the light is flashing.
Can I just clear P2314?+
It will return quickly if the coil, plug, or boot is faulty. Clearing it does not fix the misfire.
Related codes
Often seen with P2314
Read & clear P2314 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