P027FCold Start Fuel Injection Quantity A Higher Than Expected
- 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
- P027F is the cold-start counterpart of P026D: during cold start the engine gets more fuel than commanded, for example from a leaking injector or an EGR valve or throttle in the wrong position that reduces fresh air. The check probably works as in warm running, from airflow and lambda against the commanded quantity. The code covers only phases with the cold-start emission strategy active (extra injections to heat the catalyst, raised idle): CARB requires faults of elements also monitored elsewhere to be reported separately during the cold-start strategy. No manufacturer using this code was found; the description follows CARB and the warm-running counterpart.
- What you may notice
- Check engine light on
- White or black smoke after a cold start
- Rough running when cold
- Likely causes
- PossibleInjector leaking or worn
- PossibleEGR valve or intake/exhaust throttle in the wrong position (less fresh air)
- PossibleLambda/NOx sensor or airflow sensor reading wrong
- RareSoftware
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.