Ignition Coil L Primary/Secondary Circuit
The P0367 code means the vehicle's onboard diagnostic system has detected: Ignition Coil L Primary/Secondary Circuit. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $80 - $400 (parts and labor)
Best-selling code reader on Amazon. Reads and clears check engine codes on any 1996+ vehicle. Under $30.
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
Essential for diagnosing sensor codes, checking voltage, and testing circuits. Under $15 and pays for itself on the first job.
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
Common Symptoms
- Check Engine Light on
- Misfire on cylinder 12
- Rough running on V12
- Power loss
Probable Causes (Ranked by Likelihood)
- Faulty ignition coil L (cylinder 12) Very High
- Damaged wiring High
- Worn spark plug Moderate
- PCM driver failure Low
Step-by-Step Diagnostic Procedure
-
Check for misfire code on cylinder 12.
-
Swap coil L with adjacent coil.
-
Inspect spark plug.
-
Measure coil resistance.
Frequently Asked Questions
Is coil L the last ignition coil?
Yes, coil L serves cylinder 12 and is the highest-numbered standard OBD-II ignition coil code.
How do I access the last coil on a V12?
On most V12 engines, the rear cylinders require removing engine covers and possibly intake components. Consult a model-specific repair manual.
Are all 12 coils the same part?
Usually yes on most V12 engines, all 12 coils are identical part numbers, which simplifies swapping for diagnosis.
Sources
This page is built from documented references. Verify against your own service info before repair work.
Explore More
Was this helpful?
Share carcodefinder.com with a friend who needs to decode their check engine light.