P2AB5Cold Start Intake Manifold Runner Control Stuck Closed Bank 1
- 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
- P2AB5 is the opposite of P2AB3: during cold start the runner control on bank 1 remains in its closed position and does not follow a command to open. CARB requires, for 2026 to 2028 phase-in vehicles, that such valves react measurably and in the commanded direction while the cold-start conditions hold, meaning a soak of six hours or more and coolant close to ambient. A flap that stays closed throttles the air path once the engine is asked for more load, so a lack of pull in the first minutes is possible, and the combustion pattern the calibration expects for the cold catalyst is lost. No manufacturer documents P2AB5 publicly. Ford's conventional counterpart outside the cold-start phase is P2006, judged against the commanded plate position. Bank 2 is P2AB6.
- What you may notice
- Check engine light on
- Less power in the first minutes after a cold start
- Higher cold-start emissions
- Likely causes
- LikelyFlaps stuck closed by deposits or condensate freezing at low temperature
- PossibleActuator motor or vacuum valve does not move the shaft
- RareBroken return spring or worn shaft bushing
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.