What does fault code ECM-P259900 mean?

Diagnostic fault code details for ECM-P259900 (Volvo C30 (2007–2013), Volvo S40 (2004–2013), Volvo S60 (2011–)). Repair service at OBD Tuning.

VOLVO

ECM-P259900 - Turbocharger Boost Control Position Sensor "A" Performance - Stuck High. General Failure Information. No sub type information

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

9 models

C30 (2007–2013), S40 (2004–2013), S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V50 (2004–2013), V60 (2011–), V70 (2008–)

Show models by year and engine (9)

What does this fault code mean?

The engine control module (ECM) sends a signal to the turbo control valve that sets the guide vane position, and the position sensor reads back where the vanes are. The code is set when the two positions disagree. The name refers to a stuck high reading, but the code covers any mismatch between requested and measured position.

Possible causes

Blocked hoses to the turbocharger and turbo control valve
Faulty vacuum pressure sensor
Faulty turbocharger

What you can do

1Check the hoses to the turbocharger and turbo control valve, since blocked hoses can give this fault
2Look along the hoses for pinching, kinks and loose connections
3With a diagnostic tool, compare the requested and measured guide vane position in live data with the engine running
4If the fault remains after the hoses are checked, have a workshop check the vacuum pressure sensor and the turbocharger

Symptoms you may notice3

Check engine light indicates a fault or behaves abnormally
Text and warning symbol in the display
Driving feels poor or power is lacking

What the fault can affect2

Engine power and speed are restricted
Exhaust gas recirculation (EGR) is not controlled

General guidance for car owners. Diagnosis on the car can point to a different cause.