Fault-Code Library · Combustion
P0305: Cylinder 5 misfire detected
The ECU detects repeated combustion failure specifically on cylinder 5.
Common symptoms
- •Shaking idle
- •Flashing warning light
- •Poor acceleration
- •Fuel smell
Likely causes
- •Spark plug or coil fault
- •Injector problem
- •Air leak
- •Low compression
First checks
- •Stop heavy driving if the lamp flashes
- •Compare misfire counters
- •Swap-test ignition parts and then verify injection and compression
Important
Active misfire can overheat the catalyst; avoid driving until the source is identified.
A fault code identifies a detected condition, not a failed part. Confirm manufacturer-specific subcodes and live data.
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