Cylinder 2 Misfire Detected
The engine computer has detected a misfire in cylinder number 2.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
When the engine runs, fuel needs to explode in each cylinder to make power. If cylinder 2 doesn't explode correctly, it throws off the engine's timing and performance.
What the computer is actually seeing
The engine control module (ECM) monitors the crankshaft position sensor and looks for consistent engine timing. A misfire in cylinder 2 causes irregular timing signals which the ECM detects as a problem.
What a healthy reading looks like
Engine RPM and crankshaft position should show consistent timing. Misfire counts for cylinder 2 will exceed 2 counts during 1000 revolutions at normal operating conditions.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the spark plug for cylinder 2 for wear or damage. If it's fouled or cracked, replace it. If it's fine, go to step 2.
- 22. Test the ignition coil connected to cylinder 2 for functionality. Use an ohmmeter to check resistance; should be between 0.5 and 1.5 ohms. If it's out of range, replace it. If good, go to step 3.
- 33. Perform a compression test on cylinder 2. It should be between 120-180 psi. If it’s low, consider mechanical failure. If normal, go to step 4.
- 44. Check the fuel injector operation by using a noid light or oscilloscope. If no signal, check wiring. If signal is present, but misfire remains, replace the injector.
Common causes
- Faulty spark plug for cylinder 2
- Failing ignition coil for cylinder 2
- Fuel delivery issue to cylinder 2
- Low compression in cylinder 2
- Faulty fuel injector for cylinder 2
Typical repair cost
$$-$$$
Related codes
Frequently asked questions
Is it safe to drive with a P0302 code?
It's not advisable as it can lead to engine damage and reduce performance. Fix soon.
Will this come back after reset?
If the underlying issue isn't fixed, the check engine light will likely return.
Why might this code pair with P0301?
P0301 indicates a misfire in cylinder 1, which may happen if there are shared issues like ignition components or fuel delivery problems.
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