P0316: Misfire on startup, first 1,000 revolutions.
Meaning, symptoms, causes and checks
P0316 records misfire during the first 1,000 engine revolutions after startup, not at 1,000 rpm. It does not identify a cylinder or cause by itself. Reproduce the original start and use associated P030x codes to direct testing.
Affected system: Powertrain
Symptoms
- Rough running immediately after starting, sometimes clearing later.
- Steady/flashing engine lamp; possible hard starting or unburned-fuel smell.
Possible causes
- Weak ignition on spark-ignition engines or incorrect injector delivery.
- Fuel supply, mixture or compression problems at startup; position signals can affect monitoring.
What to check
- Record temperature, soak time, freeze-frame and P030x codes before clearing.
- Monitor misfire counters during a comparable start and identify affected cylinders.
- Check battery/cranking speed to specification and address related CKP/CMP/fuel codes.
- On gasoline engines inspect plugs/coils/moisture; test injection and mixture as specified.
- For repeated cold misfire on one cylinder, check sealing/compression; verify with another comparable start.
Also written as: P0316-00, P031600, PO316 (some scan tools add the fault-type byte, e.g. -00).