Fuel and air

P0247 — Turbocharger Wastegate Solenoid B Malfunction

Severity: medium Drive with care, to a shop

What P0247 means

The engine control module regulates boost with a solenoid that controls the vacuum or pressure sent to the wastegate actuator. P0247 is set when the ECM sees an electrical fault in the solenoid B circuit (open, short, or wrong voltage) or the solenoid does not control boost as commanded. Boost is then no longer regulated properly.

Symptoms

  • Check Engine light on
  • Reduced power and sluggish acceleration
  • Poor or delayed turbo response
  • Limp mode
  • Higher fuel consumption
  • Unusual turbo noises
  • Power loss on one turbo bank (twin-turbo engines)

Possible causes

  1. Failed wastegate solenoid B
  2. Damaged or corroded wiring and connectors in the solenoid circuit
  3. Vacuum line leaks or blockages
  4. Stuck wastegate or faulty actuator
  5. Rarely, an ECM output driver fault

How to diagnose

  1. Read codes and freeze-frame data and look for other boost-related codes
  2. Inspect the solenoid connector and harness for corrosion, chafing, and bent pins
  3. Check power and ground at the solenoid connector and test the wires back to the ECM
  4. Measure solenoid coil resistance and compare it with spec
  5. Inspect vacuum hoses and lines for cracks, kinks, and blockage
  6. Command the solenoid with a scan tool and confirm it clicks and the actuator rod moves
  7. Compare specified and actual boost in live data
  8. Check that the wastegate moves freely through its full range

Common fixes

  • Replace wastegate solenoid B
  • Repair or replace damaged wiring and connectors
  • Replace faulty vacuum hoses and fix leaks
  • Repair or replace the wastegate actuator
  • Reprogram or replace the ECM (last resort)

P0247 on different brands

Ford · manuals
On Ford, P0247:16 means the voltage in the wastegate solenoid B circuit is below the threshold; it identifies the monitor condition detected, not necessarily a failed solenoid.

Questions and answers

Can I drive with a P0247 code?

For a short time and carefully, yes, but power will be reduced and the engine may go into limp mode. Because of the risk to the turbo and engine, get it diagnosed soon.

What most often causes P0247?

Most often it's the solenoid itself or damaged wiring or a bad connector. Vacuum lines and the wastegate actuator should also be checked.

Can I just clear the code?

Clearing it only turns the light off temporarily. If the cause isn't fixed, the code will return, and the power loss and turbo risk remain.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.