Ignition Coil J Primary/Secondary Circuit
The P0363 code means the vehicle's onboard diagnostic system has detected: Ignition Coil J Primary/Secondary Circuit. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $50 - $300 (parts and labor)
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Common Symptoms
- Check Engine Light on
- Misfire on cylinder 10
- Rough running
- Loss of power
Probable Causes (Ranked by Likelihood)
- Faulty ignition coil J (cylinder 10) Very High
- Damaged wiring to coil J High
- Worn spark plug on cylinder 10 Moderate
- PCM coil driver failure Low
Step-by-Step Diagnostic Procedure
-
Check for misfire code on cylinder 10.
-
Swap coil J with adjacent coil.
-
Inspect cylinder 10 spark plug.
-
Measure coil resistance.
Frequently Asked Questions
Is coil J the last coil on a V10?
Yes, coil J serves cylinder 10, which is the last cylinder on a V10 engine.
Are V10 coils expensive?
For domestic V10 trucks, coils cost $20-$60 each. For exotic V10 sports cars, coils may cost $80-$200 each.
Can a worn spark plug kill an ignition coil?
Yes, a spark plug with an excessive gap forces the coil to produce higher voltage, which can cause premature coil failure over time.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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