What does this code mean?
The monitored boost is insufficient for the calibrated operating condition. This describes a control result, not proof of a failed turbocharger. Air-path restriction, control-system behavior and environmental conditions must be evaluated within the vehicle procedure. The cited GM bulletin documents an ice-related case with possible reduced power.
Sources and interpretation [1] [3]
A code identifies a detected condition, not a part that must automatically be replaced.
Before replacing a part
Record whether the fault occurs only in cold weather and compare desired with actual boost. Review the exact engine's air path and boost-control tests. A cold-weather bulletin is not evidence that every P0299 requires a turbocharger or software replacement.
Manufacturer communications
9Original wording in English
BUICK, CHEVROLET
Reported code forms P0299
This Preliminary information communicates to the technician the diagnostic direction necessary to address MIL illumination with DTCs P0121, P0299, P1101 or P00C7.
BUICK, CHEVROLET
Reported code forms P0299
This engineering information (EI) closure ends the need for gathering further information from technicians in regard to the Malfunction Indicator Lamp (MIL) illuminated on Driver Information Center (DIC), DTC P0299 Set.
BUICK, CHEVROLET
Reported code forms P0299
This technical bulletin provides repair information to correct a customer concern of Poor Engine Performance in Extremely Cold Weather Conditions, Charge Air Cooler Icing - Malfunction Indicator Lamp (MIL) Illuminated,…
BUICK, CHEVROLET
Reported code forms p0299
This Preliminary information communicates the possibility of dtc p0299 setting as a result of the vacuum supply line from the vacuum pump to the wastegate solenoid being restricted with adhesive bonding material.
BUICK, CHEVROLET
Reported code forms P0299
This technical bulletin provides repair information to correct a customer concern of Poor Engine Performance in Extremely Cold Weather Conditions, Charge Air Cooler Icing - Malfunction Indicator Lamp (MIL) Illuminated,…
BUICK, CHEVROLET
Reported code forms P0299
This Preliminary information communicates to the dealers information related to updating the Engine Control Module Calibrations for a DTC P0299.
Check vehicle applicability
7A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Sources and interpretation
These explanations are editorial summaries of the linked manufacturer material. PDF page numbers count from the first file page. Original publications are in English; translations are reference aids. A cited edition is not a claim that it is the manufacturer's latest instruction.
- Audi TT Quick Reference Specification Book · October 2013 ↗
Audi of America · PDF page(s) 137 ·
- 22-NA-002 · P0299/P0234 during cold or freezing temperatures ↗
General Motors · PDF page(s) 1 ·
- 2024–2025 MY OBD System Operation Summary for Gasoline Engines ↗
Ford Motor Company · PDF page(s) 86, 87 ·
Source check date · 2026-10-27
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.