What does code P0299 mean?

P0299 — Turbocharger Underboost Condition. Belongs to the powertrain.turbo system. Severity: warning.

What are the common causes of P0299?

Circuit fault; Faulty wiring or connector; Faulty turbocharger or wastegate

Can I drive with code P0299?

Limited: reaching the nearest workshop is fine, but avoid long trips. May progress into a more serious fault.

How do I diagnose P0299?

Read the code and freeze-frame with a scanner, check related-system errors, inspect the components listed (wiring, connectors, sensors). See the "How to diagnose" section above for the full step-by-step.

How do I clear code P0299?

The code can be cleared via an OBD-II scanner (e.g. ELM327 + the Car Diagnostics app): plug the adapter into the OBD port, go to Errors → Clear. If the underlying cause isn't fixed, the code will return within a few drive cycles.

OBD-II Code P0299 — Car Diagnostics Platform

What it means

Common causes

Circuit fault
Faulty wiring or connector
Faulty turbocharger or wastegate

How to diagnose

01
Read all stored and pending codes with an OBD-II adapter — get the full picture, not just the one code.
02
Capture freeze-frame data (RPM, coolant temperature, engine load) at the exact moment the code triggered.
03
Inspect the named subsystem with our app's AI explanation — get vehicle-specific causes for your make, model and year.

Common patterns on specific vehicles

VW / Audi 1.4/1.8/2.0 TSI

On TSI engines, P0299 (underboost) is a torn wastegate actuator diaphragm (N75) in ~80% of cases. Quick test: live MAP data holds below target.
Ford EcoBoost

On Ford EcoBoost, P0299 is more often a cracked intercooler hose. Hard to see visually — soap-and-water on connections while under boost.

Empirical mechanic observations. Your case may differ — use as a starting hypothesis, not a diagnosis.

Decode P0299 on your actual car

Plug in an OBD-II adapter and get an AI-powered diagnosis tailored to your vehicle make, model and year — in 30 seconds.

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