P0243 OBD-II Trouble Code: Turbocharger Wastegate Solenoid A Malfunction

Check Engine Light

P0243 code definition

Turbocharger Wastegate Solenoid A Malfunction

What the P0243 code means

P0243 is a generic OBD-II code indicating that the Engine Control Module (ECM) detected the turbocharger wastegate solenoid has an open or short circuit.

What causes the P0243 code?

  • The turbocharger wastegate solenoid is shorted or has an open in the solenoid.

  • The solenoid connector is corroded, causing an open circuit.

  • The wiring in the solenoid circuit is shorted to power or ground, or open circuit from a broken wire or connector.

What are the symptoms of the P0243 code?

  • The Check Engine Light is illuminated and the code is set in memory.

  • The engine turbo boost may not be able to be controlled properly and may underboost the engine.

  • The engine may lack power during acceleration if the wastegate solenoid is failing to control the correct amount of boost pressure.

How does a mechanic diagnose the P0243 code?

  • Scans codes and documents the freeze frame data in order to verify the problem
  • Clears the codes to verify whether the concern comes back
  • Checks the operation of the wastegate solenoid
  • Checks the solenoid resistance to see if it is within specifications
  • Checks the solenoid connector for loose or corroded pins
  • Checks the wiring from the solenoid to the ECM for shorts or open circuits

Common mistakes when diagnosing the P0243 code

Follow these simple guidelines to prevent misdiagnosis:

  • Check the wastegate solenoid voltage supply fuse for vehicle battery voltage.
  • Check electrical connections at the solenoid for corrosion on pins.

How serious is the P0243 code?

The turbo boost pressure in the intake is controlled with the wastegate and wastegate solenoid on most vehicles with a turbocharger. If the solenoid is malfunctioning, then the ECM cannot enable and control the turbo boost, often resulting in a lack of power.

What repairs can fix the P0243 code?

  • Replacing a wastegate solenoid with an open circuit
  • Repairing or replacing a solenoid wiring connection with corrosion in the pins

Additional comments for consideration regarding the P0243 code

Code P0243 is triggered by the ECM indicating a malfunction condition in the wastegate solenoid circuit; the ECM sees an open or short in the circuit. The most common failure is the wastegate solenoid itself.

Need help with a P0243 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

More related articles

How Long Does a Fuel Filler Neck Last?
Getting gas from the pump to your gas tank is the only way to keep a car going. The fuel filler neck is a metal tube that is welded to the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
Auto Safety Tips
Driving is more than a way to get from point A to point B. Owning and driving a car can also be a highly enjoyable experience. Whether a person is driving...

Related questions

Q: Check engine light keeps coming back on

Hello. I would need to know the exact codes to be able to give good information about this. If you have a reoccurring misfire code, then a compression test needs to be done to see if there is an internal...

Q: Car starts hard and occasionally stalls out. Smells like gas when running.

Hello. If you have poor connections at the ignition coils then that will cause cylinder misfires. These loose connections can also shorten the life of the ignition coils. The connectors need to be replaced in order to ensure that there...

Q: Engine light on

The Check Engine Light is an indicator that something is wrong. You should have the system scanned to retrieve the stored trouble codes and have them diagnosed. It can be on from something simple like a loose fuel cap to...