P0316Engine Misfire Detected on Startup (First 1000 Revolutions)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0316 concerns misfire within the first 1,000 revolutions after start. CARB requires a pending code here after the first exceedance of the emissions-relevant rate (later in the drive only after the fourth) and the warning light if it recurs at the next start. Ford sets P0316 in addition to the cylinder code; GM evaluates the start within P0300–P0308 without its own code. Typical causes are water in the plug wells (Mazda Tribute bulletin: blocked drain in the valve cover channel), coils that arc when cold and damp, injectors that drip after switch-off and over-rich starting – Ford traced cases on the 2.7 EcoBoost to engine software or leaking direct injectors.
- What you may notice
- Check engine light (usually with P0300/P030x)
- Rough running right after a cold start, then normal
- Delayed start, fuel smell at start
- Likely causes
- LikelyMoisture or water in the plug wells, coils arcing when cold or damp
- PossibleLeaking injectors (fuel drips after switch-off, over-rich start)
- PossibleWorn or sooted spark plugs that only fire cleanly when warm
- RareWrong temperature sensor value or engine software
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.