What causes fault code P0360?

• Most likely: Defective ignition coil (internal short or open circuit) • Likely: Damaged wiring harness (chafing) or corroded connector at ignition coil J • Possible: Faulty spark plug (excessive resistance taxing the coil) • Rare: Failed ignition driver within the Engine Control Unit (ECU)

How do you fix fault code P0360?

STEP 1: Inspect the connector at ignition coil J. Look for corrosion or bent pins. STEP 2: Test power supply. With ignition ON, check for battery voltage (approx. 12.6V) at the coil harness. Check ground circuit integrity (should be <0.2V drop). STEP 3: Perform a coil swap. Move coil J to another cylinder. If the DTC follows the coil, replace the ignition coil. STEP 4: Inspect spark plug for fouling or excessive gap. STEP 5: If the fault persists, use an oscilloscope to check the trigger signal from the ECU while cranking/running.

Powertrain (Engine & Gearbox)Standard EOBD

P0360 - Ignition Coil J Primary/Secondary Circuit Malfunction

Q: What does fault code P0360 mean?

P0360 is a diagnostic trouble code (DTC) that refers to a malfunction in the ignition coil 'J' primary or secondary circuit. 'J' denotes the 10th cylinder in the firing order. The Engine Control Unit (ECU) monitors the ignition coils by checking for a specific voltage drop or an ignition confirmation signal (IGF) once the coil is fired. If the circuit is open, shorted to ground, or shorted to voltage, the ECU will register P0360. This often leads to a misfire and potential shutdown of the specific fuel injector to protect the catalytic converter.

Q: What are the symptoms of fault code P0360?

• Check Engine Light (MIL) illuminated or flashing • Engine misfire or rough idling • Noticeable loss of engine power • Decreased fuel economy and smell of unburnt fuel • Vehicle may enter 'Limp Mode' to protect the engine

Last updated:1 February 2026

Related:Ignition Coil, Spark Plug, Engine Control Unit (ECU), Kabelstam

System

Powertrain (Engine & Gearbox)

Related Fault Codes

P0300

Random or Multiple Cylinder Misfire Detected

P0301

Cylinder 1 Misfire Detected

P0302

Cylinder 2 Misfire Detected

P0303

Cylinder 3 Misfire Detected

Technical Description

P0360 is a diagnostic trouble code (DTC) that refers to a malfunction in the ignition coil 'J' primary or secondary circuit. 'J' denotes the 10th cylinder in the firing order. The Engine Control Unit (ECU) monitors the ignition coils by checking for a specific voltage drop or an ignition confirmation signal (IGF) once the coil is fired. If the circuit is open, shorted to ground, or shorted to voltage, the ECU will register P0360. This often leads to a misfire and potential shutdown of the specific fuel injector to protect the catalytic converter.

Possible Causes

Defective ignition coil (internal short or open circuit)

Damaged wiring harness (chafing) or corroded connector at ignition coil J

Faulty spark plug (excessive resistance taxing the coil)

Failed ignition driver within the Engine Control Unit (ECU)

Symptoms

Check Engine Light (MIL) illuminated or flashing

Engine misfire or rough idling

Noticeable loss of engine power

Decreased fuel economy and smell of unburnt fuel

Vehicle may enter 'Limp Mode' to protect the engine

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P0360 - Ignition Coil J Primary/Secondary Circuit Malfunction

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P0360 - Ignition Coil J Primary/Secondary Circuit Malfunction

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