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

P0247 Turbocharger/Supercharger Wastegate Actuator B

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. P0247 is the general circuit fault of actuator B, the counterpart of P0243. On GM's 3.0 litre twin-turbo V6 (LGW) it means an open circuit of more than 200 kΩ with the driver off, 10 of 20 samples, warning light in the first trip. Ford uses it on twin-turbo V6 engines with electric wastegates as the collective code for open and short circuits (0.4 s), together with P2ABE. Boost control on that side is switched off, costing power.

Likely causes

Connector at wastegate valve or actuator B loose or corroded
Coil or motor winding of actuator B open
Broken control or supply wire
Driver stage in the engine module faulty

Symptoms

  • Check engine light on
  • Clearly less power, boost only at base level
  • Uneven boost between the turbos
  • Reduced engine power message possible

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€30–600
Time0.5–3 h

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

Parts involved

wastegate actuator bwastegate solenoid valveactuator wiring

Related codes

P0248P0249P0250P0243P2ABEP25B5

References: law.cornell.edu, gsi.ext.gm.com, gsi.ext.gm.com, fordservicecontent.com.