P0299

Turbocharger/Supercharger Underboost Condition

Q: What does fault code P0299 mean?

Turbocharger/Supercharger Underboost Condition. The ECM has detected that the actual boost pressure is significantly below the target boost pressure.

Q: What are the possible causes of P0299?

Turbocharger performance degraded; Intake piping or intercooler leak; Wastegate stuck in the open position; Boost pressure sensor failure; Air filter severely clogged.

Severity: Medium Fuel & Air Metering Generic Code

Detailed Description

The ECM has detected that the actual boost pressure is significantly below the target boost pressure.

Possible Causes

Turbocharger performance degraded

Intake piping or intercooler leak

Wastegate stuck in the open position

Boost pressure sensor failure

Air filter severely clogged.

Solutions & Repair Guide

Check intake piping and intercooler for sealing (smoke test recommended); Check wastegate condition; Verify boost pressure sensor; Check that the turbocharger spins freely without excessive play.

Disclaimer: The information above is for reference only and does not constitute professional repair advice. Actual causes may vary depending on vehicle make, model, year, and configuration. Always consult a qualified technician for accurate diagnosis.