Powertrain, generic · Ignition system or misfire

P0316 Engine Misfire Detected on Startup (First 1000 Revolutions)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

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.

Likely causes

Moisture or water in the plug wells, coils arcing when cold or damp
Leaking injectors (fuel drips after switch-off, over-rich start)
Worn or sooted spark plugs that only fire cleanly when warm
Wrong temperature sensor value or engine software

Symptoms

  • Check engine light (usually with P0300/P030x)
  • Rough running right after a cold start, then normal
  • Delayed start, fuel smell at start

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–1,200
Time0.3–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

ignition coilsspark plugsfuel injectors

Related codes

P0300P0301P0315P0171P0128

References: law.cornell.edu, newtonnet.co.uk, fordservicecontent.com, static.nhtsa.gov.