Misfire
Random or cylinder-specific combustion failure. The general code (P0300) plus a cylinder code (P0301-P0312) in the same session usually means one cylinder is dragging the whole engine.
8 documented codes across 108 real diagnostics.
Ranked by how often we actually see them
| Code | What it is | Diagnostics |
|---|---|---|
| P0300 | Random or multiple cylinder misfire detected | 44 |
| P0303 | Cylinder 3 misfire detected | 22 |
| P0301 | Cylinder 1 misfire detected | 22 |
| P0302 | Cylinder 2 misfire detected | 12 |
| P0304 | Cylinder 4 misfire detected | 4 |
| P0305 | Cylinder 5 misfire detected | 2 |
| P0313 | Misfire detected with low fuel | 1 |
| P0306 | Cylinder 6 misfire detected | 1 |
FAQ
Frequently asked questions
How do I run a diagnosis?
Select the vehicle on Start, click the Diagnostic card and choose New diagnostic. Fill in the description, the error codes and the mileage, then click Analyze.
Learn more: Diagnostic (vehicle-first start), Diagnostic form: description, error codes and mileage
Do I have to type the codes from my scan tool?
No. Click the camera button next to Error codes and take or choose a photo (JPEG or PNG) of the scan tool's screen; WrenchLane reads the codes and their descriptions into the form. You can also speak them with the microphone.
Learn more: OBD reader photo scan (fault codes from a photo), Voice input for the problem description
Are the public fault code pages built from my diagnostics?
They are built from anonymised, aggregated diagnostics run in WrenchLane; no workshop, customer or vehicle can be identified. Each fault code page shows how often the code was seen across those diagnostics and in how many separate workshops.
Learn more: Fault code pages on wrenchlane.com (fault-code cluster)
Work a misfire fault on a real car
Enter the codes and the symptoms and get ranked probable causes for that specific vehicle, with the checks in the order worth doing them. Free account, no card.
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