What does fault code CEM-8E02 mean?

Diagnostic fault code details for CEM-8E02 (Volvo C30 (2007–2013), Volvo C30 Electric (2011–2013), Volvo C70 (2006–2013)). Repair service at OBD Tuning.

VOLVO

CEM-8E02 - Relay, back-up (reversing) lamp. Internal fault

System

Central Electronic Module (CEM)

Volvo models this fault code applies to

Applies to the following models:

5 models

C30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)

Show models by year and engine (5)

What does this fault code mean?

The code is set when the CEM registers an internal fault while the reversing light relay is activated. The reversing light then stays on constantly. The fault lies in the module itself, so the wiring is not the first suspect.

Possible causes

Internal fault in the module

What you can do

1Switch the ignition off and on and check whether the reversing light goes out as it should
2Clear the code and see whether it returns after a test drive
3Have a workshop replace the module if the fault is permanent. If it comes and goes, it may have started when the module started up

Symptoms you may notice1

The reversing light stays on constantly

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