What does fault code ECM-U041541 mean?

Diagnostic fault code details for ECM-U041541 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo S80 (2007–)). Repair service at OBD Tuning.

VOLVO

ECM-U041541 - Brake Pedal Switch Circuit. Bus Signal / Message Failures. Value of signal protection calculation incorrect

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

3 models

S60 (2011–), S80 (2007–), V70 (2008–)

Show models by year and engine (9)

What does this fault code mean?

The engine control module (ECM) receives brake pedal status from the brake control module (BCM) over CAN, including from a cancel switch fitted to cars with adaptive cruise control. The code is set when the signal from that cancel switch is judged to be faulty. The code can also be set during a CAN communication fault, in which case it appears together with other codes. Although the code is titled brake pedal switch circuit, it concerns the cancel switch.

Possible causes

Fault in the brake control module (BCM), which should be checked first
Fault on the CAN network

What you can do

1Read the codes in the brake control module and the engine control module. Troubleshoot the CAN-related codes first
2Check that the fuses are intact
3Check the CAN connectors between the engine control module and the brake control module for oxidation and loose contacts
4Use a multimeter to check that the CAN wires have no break or short to ground or supply voltage
5Do not work on the braking system yourself. If it returns: have a workshop check the brake module and the cancel switch

Symptoms you may notice1

The cruise control does not engage

What the fault can affect1

The cruise control is switched off while the fault is active

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