P0243 code meaning
Turbocharger/Supercharger Wastegate Actuator A
Powertrain system Generic code P02xx codes Check engine light
What P0243 means
The wastegate lets exhaust bypass the turbine to limit boost; actuator A is either a pulse-width-modulated solenoid on a pneumatic wastegate can or an electric actuator with a position sensor. P0243 is the general circuit fault of actuator A. GM uses it for an open circuit: with the driver off, more than 200 kΩ between output and ground in 10 of 20 samples sets it with the warning light in the first trip (older modules: two trips). Ford uses P0243 on its electric wastegates as the collective code for open and short circuits (0.4 s), together with P2ABD for driver overcurrent or overheating. Boost control is then switched off and only the spring-set base boost remains – less power, but no risk of overboost.
P0243 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0243
- Check engine light on
- Clearly less power, boost only at base level
- Sluggish acceleration, turbo lag
- Reduced engine power message possible
Common causes of P0243
- Most likelyConnector at the wastegate valve or actuator loose, corroded or with spread contacts
- PossibleValve coil or electric actuator winding open
- PossibleSupply voltage to the valve missing (ignition, relay, fuse)
- PossibleBroken control wire between module and valve
- Less likelyDriver stage in the engine module faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Wastegate actuator aWastegate solenoid valveActuator wiring
What each part of P0243 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 2 | Area: fuel and air metering (injector circuit). |
| 43 | The exact fault in that area. |
What to do next
- Note P0243 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0243
What does P0243 mean?
P0243 means "Turbocharger/Supercharger Wastegate Actuator A". The wastegate lets exhaust bypass the turbine to limit boost; actuator A is either a pulse-width-modulated solenoid on a pneumatic wastegate can or an electric actuator with a position sensor. It is a generic code, so it means the same on every make.
Is it safe to drive with P0243?
Drive gently and only to a workshop. With P0243 the car can go into limp mode (reduced power) to protect itself.
Will P0243 fail an emissions test?
Yes, it can. P0243 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0243 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0243 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.