OBD2 fault code
Very highP0301
Cylinder 1 Misfire Detected
The code identifies an implausible condition in the monitored system. The component named in the code is not automatically the defective part.
What does P0301 mean?
Cylinder 1 Misfire Detected. The engine or vehicle control system detected that a measured value, control response, or communication signal was outside the expected range.
Common symptoms
- engine shakes or runs very roughly
- flashing check engine light
- power loss and possible fuel smell
Likely causes
- faulty spark plug, ignition coil, or injector
- fuel, air, or compression problem
- sensor, timing, or engine-control fault
Sensible diagnostic order
- check misfire counters and affected cylinder
- swap or test spark plugs and coils
- check compression, injection, and fuel pressure
Can I continue driving?
Stop if warning lights, power loss, or rough running occur. If the check-engine light flashes, the engine shakes strongly, warning messages increase, or power drops significantly, stop and arrange professional assistance.
This information is a diagnostic aid and does not replace inspection by a qualified workshop. Manufacturer-specific definitions may differ.
FAQ
Can I continue driving with P0301?
Stop if warning lights, power loss, or rough running occur.
Does P0301 always identify a defective part?
No. A fault code identifies a monitored system or implausible condition. Wiring, voltage, leaks, and related components must also be checked.
How can DiagnostiX help with P0301?
DiagnostiX reads the code from the vehicle, assigns it to the vehicle profile, and displays relevant live values and a structured explanation.