P0316 Engine Misfire Detected on Startup (First 1000 Revolutions)

P0316 indicates a misfire detected during startup, typically within the first 1000 revolutions. It captures a cold-start or initial-run misfire pattern.

Code details

Generic OBD-II · P0

System: Ignition / Misfire
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not diagnose only after the engine is warm; startup misfires often disappear once heat expansion or enrichment changes the conditions.

Symptoms of P0316

Rough idle, shaking, or a stumble under acceleration.
A flashing check-engine light during an active misfire.
Power loss and higher fuel consumption.

Common causes of P0316

Worn spark plugs, ignition coils, or plug wires.
Fuel-delivery problems — injectors, pressure, or a lean/rich mixture.
Vacuum leaks, low compression, or a mechanical fault in that cylinder.

Useful checks before replacing parts

Review freeze-frame temperature, startup time, fuel trims, and cylinder-specific misfire counters if available.
Check ignition parts, injector leakdown, fuel pressure retention, compression, coolant intrusion, and vacuum leaks that show up cold.
Pair this code with any P030x codes to identify whether the startup misfire is random or cylinder-specific.

Related OBD-II codes

These nearby ignition / misfire entries can help compare wording and pin down the fault area.