NetworkU35774B

Serious

Severity: Serious - have it checked soon

Sensor module C of the hybrid/high-voltage battery module has a malfunction. Over Temperature.

1 brand affected · Description from Mercedes-Benz data.

Key terms: Control module: a small computer that runs one part of the car

Safety: This code relates to battery, high-voltage or charger overheating. An overheating battery can catch fire.

1What it means in plain English

Control modules in the car cannot communicate with each other over the vehicle network.

2Common causes

Wiring or connector fault on the communication bus
Faulty control module
Low battery voltage or poor ground
Water ingress in a connector or module
Aftermarket device interfering with the bus

3Can I drive?

Serious · drive with care

Stop safely away from buildings and people - battery overheating can lead to fire. Do not charge or drive. Have the vehicle recovered.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 1

Brand	Code	Description	System
Mercedes-Benz	U35774B	Sensor module C of the hybrid/high-voltage battery module has a malfunction. Over Temperature. Brand	Network

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Related codes

Browse Uxxx codes or U357xx codes.