What Does P0360 Mean?
The ECM has detected a primary or secondary circuit malfunction in ignition coil J, which serves cylinder #10 on engines with ten or more cylinders such as V10 configurations found in Dodge Viper, Audi S6/S8, or certain diesel applications. The coil driver monitoring indicates abnormal electrical behavior. Given the rarity of V10+ gasoline engines, this code is seldom encountered and typically requires specialized service procedures.
Common Causes
40%
Failed ignition coil J with internal winding or epoxy insulation failure from high-performance engine heat cycling
25%
Wiring harness or connector damage in the coil J circuit due to tight packaging on high-cylinder-count engines
20%
Worn spark plug on cylinder 10 causing excessive secondary circuit demand
15%
ECM coil driver transistor failure for the cylinder 10 output
Diagnostic Steps
1
Swap coil J with a known-good coil from another cylinder, clear codes, and drive to reproduce. Track the fault to determine if it follows the coil or stays with the cylinder.
2
Measure coil J primary (0.4-1.0 ohms) and secondary (6,000-12,000 ohms) winding resistance. Compare to manufacturer specifications for the specific V10 application.
3
Inspect the coil J connector for heat damage and corrosion. On V10 engines, the rear cylinders are often difficult to access and inspections are frequently deferred.
4
Check the cylinder 10 spark plug for proper gap and condition. V10 engines often require premium spark plugs with specific heat ranges.
5
Verify ECM trigger signal for cylinder 10 during cranking and confirm power supply voltage at the coil connector.
Estimated Repair Cost
$80 - $450
Parts + labor, varies by vehicle and location
The ECM has detected a primary or secondary circuit malfunction in ignition coil J, which serves cylinder #10 on engines with ten or more cylinders such as V10 configurations found in Dodge Viper, Audi S6/S8, or certain diesel applications. The coil driver monitoring indicates abnormal electrical be...
The most common cause of P0360 (Ignition Coil J Primary/Secondary Circuit Malfunction) is: Failed ignition coil J with internal winding or epoxy insulation failure from high-performance engine heat cycling
Typical repair costs for P0360 range from $80 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Cylinder 10 misfire reduces engine power and creates exhaust imbalance. On high-performance V10 engines, sustained misfire risks catalytic converter damage from unburned fuel.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0360 to identify the root cause.
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Quick Info
Category
Powertrain
System
Ignition System
Difficulty
Type
Generic (SAE)
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