P0247🔧 Turbo/supercharger boost control (wastegate solenoid)Stop and fix promptly

P0247: Turbocharger/Supercharger Wastegate Solenoid B Circuit (Meaning, Causes, Fixes)

Reviewed 2026-10-26 · Based on 2 cited source(s)

What P0247 means

On a turbocharged or supercharged engine, the powertrain control module (PCM) controls boost pressure through the output circuit to the "B" wastegate/boost pressure control solenoid. OBD-Codes.com says the PCM sets P0247 any time there is an electrical problem with this circuit that it cannot otherwise identify, and that this is an electrical circuit fault only. It notes the code applies to turbocharged and supercharged engines including certain Audi, Ford, GM, Mercedes, Mitsubishi, VW and Volvo models, and that troubleshooting varies by manufacturer, type of boost control and wire colors. RepairPal lists P0247 as "Turbocharger/Supercharger Wastegate Solenoid 'B'" and says the wastegate solenoid lets unneeded boost vent from the system; if the PCM cannot control the solenoid, it sets P0247. The sources disagree on the likely cause: RepairPal lists a PCM failure first, while OBD-Codes.com says a failed PCM is highly unlikely. P0247 is the solenoid B version of P0243 (solenoid A); related codes for solenoid B are P0248 (range/performance), P0249 (low) and P0250 (high).

Severity: can I keep driving?

Stop and fix promptly

Get it checked soon and drive gently until you do. RepairPal rates P0247 Urgent, meaning immediate action is needed, and says the computer may disable the turbo or supercharger to prevent further damage. OBD-Codes.com lists lack of power as a symptom.

Common symptoms

Likely causes

Roughly most to least common, based on the sources below. Your vehicle may differ.

  1. An open in the control (ground) circuit between wastegate solenoid B and the PCM (OBD-Codes.com; RepairPal lists a wiring issue)
  2. An open in the power supply circuit to solenoid B, or a short to ground in that power supply circuit (OBD-Codes.com)
  3. Loose, burned or corroded connector terminals at the solenoid (OBD-Codes.com)
  4. A faulty wastegate/boost pressure control solenoid B (OBD-Codes.com, RepairPal)
  5. A failed PCM (RepairPal lists it first; OBD-Codes.com says this is highly unlikely)

Diagnostic steps you can do

⚠ Before you start

Work on a cool engine, parked on level ground with the parking brake set. Never work under a car supported only by a jack.

  1. Check for technical service bulletins (TSBs) for your vehicle first. OBD-Codes.com says the problem may be a known issue with a known fix.
  2. Find the wastegate/boost control solenoid for the B circuit and inspect its wiring and connector for scraping, rubbing, bare wires, burn spots or melted plastic. Pull the connector apart and look for burned or green, corroded terminals.
  3. Clean corroded terminals with electrical contact cleaner and a plastic brush, let them dry, and apply electrical grease. Then clear the code and see if it returns; if it doesn't, OBD-Codes.com says the connection was most likely the problem.
  4. If it comes back, unplug the solenoid and measure its resistance across the two terminals with a multimeter. It should be neither open nor shorted; check the spec in your service manual. OBD-Codes.com says to replace an open or shorted solenoid.
  5. With the ignition on, check for 12 volts on the solenoid's power supply wire. OBD-Codes.com says no voltage with the key on, or voltage with the key off, points to wiring from the PCM or relay, or possibly the PCM.
  6. If power is good, OBD-Codes.com describes using a test light connected to battery positive on the solenoid's ground wire while a scan tool cycles the solenoid. It should light each time; wiggle the harness to look for a flicker that shows an intermittent connection.

Typical fixes

Repair costs vary widely by vehicle, region, parts brand and shop, so we don't quote prices. Get a written estimate after diagnosis.

🛠 When to call a pro

  • The engine has very low power or goes into limp mode
  • You don't have a multimeter, test light, scan tool that can command the solenoid, or a service manual with the resistance spec
  • The solenoid and wiring test good and the code keeps returning
  • A PCM replacement is suggested, since it must be programmed to the vehicle

Where to buy

Plain search links. Always match parts to your exact year, make, model and engine.

OBD2 scanners on Amazon Parts at Advance Auto Parts catalog at RockAuto

FAQs

Can I drive with a P0247 code?

Only gently and not for long. RepairPal rates it Urgent and says the computer may shut off the turbo or supercharger to prevent damage, so expect low power until it's fixed.

What is the difference between P0243 and P0247?

They describe the same kind of electrical fault on two different wastegate/boost control solenoids. Per OBD-Codes.com, P0243 is for solenoid A and P0247 is for solenoid B. Which physical solenoid is B depends on the vehicle, so check a service manual.

Is P0247 a bad PCM?

The sources disagree. RepairPal lists a PCM failure first, while OBD-Codes.com says a failed PCM is highly unlikely, though it can't be ruled out until the solenoid has been replaced. Check connections, wiring and the solenoid before suspecting the computer.

How much does it cost to fix P0247?

Neither source gives a repair cost. Cleaning a connector or repairing a wire is usually far cheaper than a solenoid or PCM, so get a diagnosis or written estimate before buying parts.

Sources

  1. OBD-Codes.com: P0247 Turbocharger Wastegate Solenoid B Malfunction (Randy Worner, ASE Certified Master Technician)
  2. RepairPal: P0247 Turbocharger/Supercharger Wastegate Solenoid "B" (rated Urgent)

Last reviewed 2026-10-26. Code definitions and repair steps can vary by manufacturer. Confirm with your vehicle's service information.