Powertrain, generic · Ignition system or misfire

P0363 Misfire Detected - Fueling Disabled

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0363 is a reaction code: the engine module has detected misfire severe enough to damage the catalyst – through its crankshaft-based misfire monitor – and has therefore shut off injection to the affected cylinder or cylinders. CARB allows exactly this: a vehicle that cuts fuel immediately on catalyst-damaging misfire may turn the check engine light on steadily instead of flashing it, and may switch fuel back on to re-check at most every 30 s. The code names no cylinder; that comes from the accompanying P0301 ff. It is documented by code only at FCA: two reprogramming bulletins for the 2017–2018 Alfa Romeo Giulia 2.0 turbo list P0363 alongside misfire and mixture codes. Ford reacts in the same way without its own code, VW uses a manufacturer code (P130A) for the hidden cylinder, and GM does not list P0363.

Likely causes

Ignition coil or spark plug of the affected cylinder faulty
Injector sticking or leaking, or fuel pressure too low
Engine module software (misfire detection, cold-start mixture)
Mechanical cause: loss of compression, valve or carbon deposits, vacuum leak

Symptoms

  • Check engine light on steadily instead of flashing
  • Clearly rough running, one cylinder without power
  • Loss of power
  • Jerking or stalling, especially when cold

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–800
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

ignition coilspark plugfuel injectorengine control module

Related codes

P0300P0301P0316P0351P0201

References: law.cornell.edu, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.