P2262Turbocharger/Supercharger Boost Pressure A Not Detected - Mechanical
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2262 says boost pressure A does not appear at all although the charging system should be producing it, and the cause appears to be mechanical rather than a sensor fault. The control unit sees the pressure after the compressor stay near ambient or close to manifold pressure. VW's 2014 book for the supercharged Touareg 3.0 TSI uses the ratio of boost to manifold pressure and flags it below a band of 1 to 1.25. Volvo technical journal 31319 (2016 four-cylinder B4204T23) traced P2262 together with P02CD to a fresh-air hose that had slipped off the air filter housing at the MAF; a spring clamp prevents a repeat. Unlike P0299, which measures a shortfall against the target, P2262 stands for boost missing altogether; P2263 rates overall control performance and P226B the opposite extreme. Acceleration feels flat, and many engines limit torque.
- What you may notice
- Clear loss of power, no turbo or supercharger pull
- MIL on, often with a reduced-power mode
- Hissing or whistling from the intake if a hose has come off
- Likely causes
- LikelyIntake or charge-air hose disconnected or split, so the compressor cannot build pressure
- PossibleWastegate or bypass stuck open, corroded or with a broken linkage
- PossibleDamaged turbocharger or supercharger (bearing wear, broken drive, wheel damage)
- RareBoost pressure sensor or its hose blocked or detached
- 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: €20 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.