MasterTuning Fault code dictionary (DTC)

P0300 — Random/multiple cylinder misfire

Severity: Serious Can you drive? With caution: limp mode possible, have it checked soon Make: All makes (OBD-II standard)
MeaningThe engine is misfiring and the ECU cannot attribute it to a single cylinder. Codes P0301 to P0308 point at a specific cylinder instead.
FamilyPowertrain (P)

Typical symptoms

Engine shaking
Flashing engine light (stop as soon as safe)
Power loss
Higher fuel consumption

Common causes

Worn spark plugs or coils (petrol)
Dirty or faulty injectors
Intake air leak
Low compression through wear
Faulty glow plugs or injection (diesel)

What to do

If the engine light is flashing, stop: unburnt fuel destroys the catalyst within a few kilometres. With a steady light you can drive gently to the workshop.

Frequently asked questions

What does code P0300 mean?

Random/multiple cylinder misfire. The engine is misfiring and the ECU cannot attribute it to a single cylinder. Codes P0301 to P0308 point at a specific cylinder instead.

Can I keep driving with code P0300 active?

With caution: limp mode possible, have it checked soon

Common causes — P0300

Worn spark plugs or coils (petrol) Dirty or faulty injectors Intake air leak Low compression through wear Faulty glow plugs or injection (diesel)

How do you fix code P0300?

If the engine light is flashing, stop: unburnt fuel destroys the catalyst within a few kilometres. With a steady light you can drive gently to the workshop.

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Where to get it fixed

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