P0248Turbocharger/Supercharger Wastegate Actuator B Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- The wastegate lets exhaust bypass the turbine to limit boost; actuator B is either a pulse-width-modulated solenoid on a pneumatic wastegate can or an electric actuator with a position sensor. B is the second turbo or actuator, so B codes only exist on engines with two. P0248 is the counterpart of P0244: actuator B does not reach the commanded position, or boost does not respond as expected, although the circuit is electrically sound. Stellantis documents it on the 2025 Ram 1500 with the 3.0 litre Hurricane twin-turbo, often with P2B94 (position sensor B learning limit): incorrectly fitted retaining clips on the wastegate rod caused missing turbo boost. Thresholds are not published; GM and Ford do not use the code, Ford monitors actuator B position under P25B5/P25B6.
- What you may notice
- Check engine light on
- Missing turbo boost, lack of power
- Uneven boost between the turbos
- Limp mode possible
- Likely causes
- LikelyRetaining clip of the wastegate rod missing or fitted wrongly, rod unhooked
- PossibleWastegate flap B coked or sticking
- PossiblePosition sensor learned value outside limits (e.g. not relearned after turbo replacement)
- RarePneumatic wastegate: control hose or can B leaking
- 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: €30 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.