What causes fault code P0363?

• Most likely: Faulty ignition coil or spark plug • Likely: Clogged or faulty fuel injector (prior to ECU shut-off) • Possible: Mechanical engine fault (low compression, leaking valves) • Rare: Faulty crankshaft position sensor or damaged tone ring

How do you fix fault code P0363?

STEP 1: Check for other stored codes (e.g., P0301-P0304) to identify the specific cylinder. Visually inspect ignition coils and wiring. STEP 2: Test ignition coil resistance (typically 0.5–2.0 Ohms primary). Perform a compression test if the ignition system checks out. STEP 3: Check fuel injector resistance (approx. 12-16 Ohms at 20°C). Use an oscilloscope to verify the injector pulse signal from the ECU. STEP 4: Replace faulty spark plugs, coils, or injectors as needed. Clear codes and perform a drive cycle to confirm the ECU re-enables fueling.

Powertrain (Engine & Gearbox)Standard EOBD

P0363 - Misfire Detected - Fueling Disabled

Q: What are the symptoms of fault code P0363?

• Check engine light (MIL) flashing or illuminated • Engine running very roughly (vibrations) • Significant loss of power (Limp mode) • Unburned fuel smell (prior to injector cut-off) • Difficulty starting the engine

Last updated:1 February 2026

Related:Spark Plugs, Ignition Coils, Fuel Injectors, Crankshaft Position Sensor, Engine Control Unit (ECU)

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

P0363 is a diagnostic trouble code (DTC) that indicates a misfire has been detected and the Engine Control Unit (ECU) has subsequently disabled the fuel supply to the affected cylinder(s) to prevent catalyst damage. While codes P0300-P0312 identify the misfire itself, P0363 specifically confirms the protective action of 'fuel cut-off'. The ECU monitors crankshaft speed fluctuations to identify precise misfire events and triggers this protective strategy when specific thresholds are exceeded.

Possible Causes

Faulty ignition coil or spark plug

Clogged or faulty fuel injector (prior to ECU shut-off)

Mechanical engine fault (low compression, leaking valves)

Faulty crankshaft position sensor or damaged tone ring

Symptoms

Check engine light (MIL) flashing or illuminated

Engine running very roughly (vibrations)

Significant loss of power (Limp mode)

Unburned fuel smell (prior to injector cut-off)

Difficulty starting the engine

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P0363 - Misfire Detected - Fueling Disabled

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P0363 - Misfire Detected - Fueling Disabled

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