Powertrain, generic · Fuel and air metering (injector circuit)

P0248 Turbocharger/Supercharger Wastegate Actuator B Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Retaining clip of the wastegate rod missing or fitted wrongly, rod unhooked
Wastegate flap B coked or sticking
Position sensor learned value outside limits (e.g. not relearned after turbo replacement)
Pneumatic wastegate: control hose or can B leaking

Symptoms

  • Check engine light on
  • Missing turbo boost, lack of power
  • Uneven boost between the turbos
  • Limp mode possible

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€30–1,800
Time0.3–5 h

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

Parts involved

wastegate actuator bwastegate solenoid valveactuator wiringwastegate linkage

Related codes

P0244P0247P0249P0250P2B94P25B5

References: law.cornell.edu, static.nhtsa.gov, static.nhtsa.gov.