What does fault code TCM-P0B0B68 mean?

Diagnostic fault code details for TCM-P0B0B68 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo V40 (2013–)). Repair service at OBD Tuning.

VOLVO

TCM-P0B0B68 - Electromagnetic Oil Pump "EMOP" Supply Voltage Circuit High. Algorithm Based Failures. Event information

System

Transmission Control Module (TCM)

Volvo models this fault code applies to

Applies to the following models:

9 models

S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)

Show models by year and engine (9)

What does this fault code mean?

This fault code is event controlled and does not indicate a fault in the control module; it is designed as information. It shows that the voltage to the electromagnetic oil pump (EMOP) in the transmission has been too high. The pump supplies the gearbox with the right pressure and flow while automatic engine start/stop is active.

Possible causes

Voltage too high
Contact resistance, oxidation or a loose connection in the connector
The connector or cable is damaged
Damaged system relay
Damaged battery

What you can do

1The code is informative and does not indicate a fault in the control module. Read and note it if you wish
2Check that the battery is in good condition and that no charger giving the wrong voltage has been connected
3Check that the connectors to the oil pump and system relay are seated firmly and free from oxidation, and that the cables are undamaged
4Have a workshop check the system relay if the code keeps appearing

Symptoms you may notice2

Automatic engine start/stop does not work while driving
Automatic engine start/stop does not work at idle

What the fault can affect1

The function for automatic engine start/stop is switched off

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