If erasing the code makes it drive OK then I would suspect the wastegate, boost control or the actuator over the turbo. Usually a turbo won't reset when you clear the code. Toss a pressure gauge onto the intake and monitor it as well as the boost on the scan tool. They should be within half a pound of each other if the system is working.
What conditions the test runs under -
Engine speed between 1,600–6,000 RPM.
Engine speed between 2,000–3,500 RPM—open loop boost control
Desired boost pressure between 140–300 kPa (20.03–43.5 PSI) and steady
Ambient pressure between 60–120 kPa (8.70–17.40 PSI)
Coolant temperature between –40 to +130°C (–40 to +266°F)
Intake air temperature between –40 to +80°C (–40 to +176°F)
If the desired boost doesn't equal the reported boost it sets the code.
I've seen stuck wastegates and the bypass solenoids fail and set the code. Both will also drop boost pressures as they dump the turbo boost. If you run the engine as above and don't see the boost numbers on the gauge but not the scan tool look at the boost sensor. If you don't see it but both the gauge and scanner read the same look at the solenoids.
Oct 16, 2026 at 12:15 AM
