Measure the Boost Pressure
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
Drive at approx. 1800 r/min in 2nd gear.
Fully depress the accelerator pedal.
Apply the brakes while depressing the accelerator pedal at an engine speed of max. 5500 r/min so that full boost is obtained.
Full boost should be between 1800-5500 r/min.
Important: Do not brake for longer than 5 seconds, otherwise serious damage may be caused to the braking system.
Check the boost pressure and basic boost pressure values at full load.
| Measured at full load | Turbo control valve connector connected: Boost Pressure | Turbo control valve connector disconnected: Basic Boost Pressure |
| B4194T2 HP manual (kPa) | 90 - 100 | 40 - 60 |
| B4194T2 HP automatic (kPa) | 50 - 60 | 20 - 30 |
| B4204T2 LP automatic/manual (kPa) | 50 - 60 | 20 - 30 |
If the test values differ from the above values, adjust the boost pressure control (BPC) valve see Checking And Adjusting the Boost Pressure Control (BPC) Valve On the Turbocharger (TC)