What does fault code ECM-0047 mean?

Diagnostic fault code details for ECM-0047 (Volvo C30 (2007–2013), Volvo C30 (2007–2013), Volvo C70 (2006–2013)). Repair service at OBD Tuning.

VOLVO

ECM-0047 - Turbocharger (TC) control valve. Signal too low

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

4 models

C30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)

Show models by year and engine (10)

What does this fault code mean?

The engine control module has registered a signal that is too low from the turbocharger control valve circuit. This is usually due to contact problems, or a break or short to ground in the wiring to the valve. The valve controls boost pressure, so the fault is often noticed in how the car drives.

Possible causes

Contact resistance or oxidation in the terminals
Open circuit or short to ground in the signal cable
Open circuit or short to ground in the power supply to the control valve
Damaged turbocharger control valve

What you can do

1With the ignition off, check the turbo control valve connector for contact resistance and oxidation
2Use a multimeter to check that the signal wire to the valve has no short to ground (the body), with the connector unplugged
3Use a multimeter to check that the power supply to the valve has no break and no short to ground
4Have a workshop check the valve and replace it if needed, once the wiring is confirmed sound

Symptoms you may notice2

Check engine lamp lights up or behaves abnormally
Car has poor performance or lacks power

What the fault can affect1

Engine torque is limited

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