What does fault code CEM-1F00 mean?

Diagnostic fault code details for CEM-1F00 (Volvo S60 (2001–2009), Volvo S80 (1999–2006), Volvo V70 (2000–2008)). Repair service at OBD Tuning.

VOLVO

CEM-1F00 - ECM, software. Faulty signal

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 has registered faulty or altered engine control software (ECM). New software must be downloaded into the ECM, which a workshop does. There are no known symptoms for the driver.

Possible causes

Faulty or modified software in the ECM

What you can do

1Has the owner changed the engine software? Discuss it with the owner first, since a change that did not cause the fault should not be corrected
2Check that the battery terminals and cable connections are clean and tight, so the download is not interrupted
3Software is downloaded with diagnostic equipment and can only be done by a workshop
4After the download, clear the code and check that it does not return

Symptoms you may notice1

No noticeable symptoms for the driver

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