VOLVO
ECM-0299 - Turbocharger (TC) control. Pressure too low
System
Engine Control Module (ECM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
4 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (6)
- Volvo C30 (2007–2013)2007–2010Engine D4204T only
- Volvo C70 (2006–2013)2008–2010Engine D4204T only
- Volvo S40 (2004–2013)2004–2006Engine D4204T, D4204T2 only
- Volvo S40 (2004–2013)2007–2010Engine D4204T only
- Volvo V50 (2004–2013)2004–2006Engine D4204T, D4204T2 only
- Volvo V50 (2004–2013)2007–2010Engine D4204T only
What does this fault code mean?
The control module compares the actual boost pressure with the calculated value and logs a fault when boost is too low. Causes can be leaks or blockages in the intake system and hoses, or faults in the control of the turbo control valve. The fault can make the car perform worse, and the warning lamp may behave abnormally.
Possible causes
- Loose, oxidized or worn connections in the wiring harness
- Air leak in the intake system
- Blocked intake system
- Leaking or blocked hoses to the turbocharger and the control valve
- Damaged turbocharger control valve
- Pinched or damaged vacuum hose
What you can do
- 1Read the fault code, clear it and road test to see whether it returns
- 2Check that the intake system is free from blockages and that the hoses are neither pinched nor cracked
- 3With the engine running, listen for air leaks at the hoses and joints
- 4Check that the connector at the turbo control valve is fully engaged and free from oxidation
- 5If you have a diagnostic tool, read boost pressure in live data as the accelerator is pressed and see whether it rises
- 6If the fault remains, have a workshop with a vacuum pump check the vacuum regulator and the turbo control valve
Symptoms you may notice2
- Check engine light comes on or behaves abnormally
- Car drives poorly and lacks power
General guidance for car owners. Diagnosis on the car can point to a different cause.