What does code P0302 mean on a Mazda and is it safe to drive?
P0302: Cylinder 2 Misfire Detected. Here's what it means on your Mazda, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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What this code means
The PCM has detected a misfire on cylinder 2. Same logic as P0301, but for a different cylinder.
Common causes for your Mazda
- Worn or fouled spark plug on cylinder 2
- Failing ignition coil
- Leaking or clogged fuel injector
- Low compression on cylinder 2
Symptoms
- Check Engine Light
- Noticeable shaking, especially at idle
- Loss of power or hesitation
Typical fixes
- Replace spark plug/coil on cylinder 2
- Clean or replace injector
- Address internal engine problems if compression is low
Repair cost range
For a Mazda, repairs for P0302 often fall between $150 and $900, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Mazda
SKYACTIV-G P0302 develops from injector fouling or a failed direct injection injector. Given the high compression, a slightly weaker injector spray on cylinder 2 causes a detectable misfire that worsens under light load. An injector flow test confirms the fault.
Most commonly affected models
Mazda3 SKYACTIV-G 2012–2018CX-5 2.5L 2013–2018Mazda6 2.5L 2014–2018