P0299 on BMW: Turbocharger / Supercharger Underboost Condition
Diagnostic trouble code P0299 on BMW vehicles — what it means, the common
causes, and how to confirm the real fault before replacing parts.
What does P0299 mean?
P0299 indicates: Turbocharger / Supercharger Underboost Condition.
This relates to the Forced induction / Boost control system.
Common causes of P0299
Boost leak/charge pipe
Diverter/wastegate
Turbo actuator
Restricted intake
What to check (live data)
Commanded vs actual boost (kPa)
Wastegate duty (%)
MAP/MAF correlation
Parts often involved in P0299
diverter valve
charge pipe / boost hose
Don't replace parts until the root cause is confirmed — many of these codes are caused by wiring, a connector or an upstream fault, not the part itself.
Get the confirmed root cause for P0299 — on YOUR vehicle
A code is a symptom, not a diagnosis. AutoDX Pro cross-checks several
independent assessments, pinpoints the actual root cause, gives you the
exact tests to confirm it, and shows the parts — only after the cause is
confirmed. Reads your scan-tool photo and decodes your VIN with open
recalls.
P0299 is a diagnostic trouble code: Turbocharger / Supercharger Underboost Condition.
What are the common causes of P0299 on a BMW?
Common causes include: Boost leak/charge pipe, Diverter/wastegate, Turbo actuator, Restricted intake. The exact cause depends on the vehicle — confirm it before replacing parts.
Can I keep driving a BMW with P0299?
It depends on the fault and your symptoms. Some causes are minor, others can damage components or affect safety. Get the root cause confirmed before deciding.
How do I fix P0299 on a BMW?
Confirm the actual root cause with targeted tests first, then replace only the part that's at fault. AutoDX Pro gives you the root cause, the exact tests, and the parts for P0299 on your specific BMW.