What does fault code ECM-U010182 mean?

Diagnostic fault code details for ECM-U010182 (Volvo S60 (2011–), Volvo S60 (2011–), Volvo S80 (2007–)). Repair service at OBD Tuning.

VOLVO

ECM-U010182 - Lost communication with Transmission Control Module (TCM). Bus Signal / Message Failures. Alive / sequence counter incorrect / not updated

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

5 models

S60 (2011–), S80 (2007–), V60 (2011–), V70 (2008–), XC60 (2009–)

Show models by year and engine (12)

What does this fault code mean?

The ECM checks the P and N signals from the gear position sensor, which reach it over the CAN network from the transmission control module (TCM). Even though the code is named sequence counter, it concerns the P and N signals. The code is set when they are missing or incorrect, and then auto start does not work.

Possible causes

Faulty CAN communication
Damaged transmission control module (TCM)

What you can do

1Read the code with a diagnostic tool and check whether it is active or only stored
2If the engine control module has other CAN-related codes stored, fault-trace those first
3This code points to a transmission control module (TCM) fault, so read the codes there
4With a diagnostic tool, read the selector position in live data while you select P and N, and check that it shows correctly
5Have a workshop check the transmission control module and the CAN communication if the fault remains

Symptoms you may notice1

Auto start does not work

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