What does fault code CEM-4F43 mean?

Diagnostic fault code details for CEM-4F43 (Volvo S60 (2001–2009), Volvo S80 (1999–2006), Volvo V70 (2000–2008)). Repair service at OBD Tuning.

VOLVO

CEM-4F43 - Light emitting diode, left camera module. Signal too high

System

Central Electronic Module (CEM)

Volvo models this fault code applies to

Applies to the following models:

5 models

S60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)

Show models by year and engine (5)

What does this fault code mean?

The CEM monitors communication between the blind spot system (BLIS) LEDs and the camera modules. If the signal from the left LED is too high, the code is set. The LED may then stay on all the time.

Possible causes

The left LED wire has a short to supply voltage

What you can do

1With the ignition on, check that the LED goes out when the system is not active
2With the ignition off, unplug the left LED plug and make sure the LED is undamaged
3Use a multimeter to check that the signal wire to the LED has no short to supply voltage
4After the work, clear the code and check that the LED works

Symptoms you may notice2

The LED does not come on
The LED is always on

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