NetworkU0698

Serious

Severity: Serious - have it checked soon

Engine Coolant Temperature Sensor. (Main Radiator.)

8 brands affected · Description from Ashok Leyland CV data.

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

Safety: This code relates to engine cooling or temperature. Overheating can damage the engine.

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

The car may run normally or may not run at all. If the module that has lost communication controls steering, brakes, park brake, charging or engine cooling, drive only if those systems feel normal; stop safely if the steering becomes heavy, a brake warning appears, or the engine temperature climbs. If the car will not start or runs badly, have it towed.

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 8

Brand	Code	Description	System
Ashok Leyland CV	U0698	Engine Coolant Temperature Sensor. (Main Radiator.) Brand	Network
Daewoo	U0698	No description available	Network
EOBD	U0698	Förlorad kommunikation med kylpump 'E' Brand	Network
GM	U0698	No description available	Network
Holden	U0698	No description available	Network
Opel	U0698	No description available	Network
Peugeot	U0698	No description available	Network
Saab	U0698	No description available	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.

5Extended variant codes 2

These 7-character codes are manufacturer-specific variants of U0698 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	U069887	Communication with coolant pump 2 of the low-temperature circuit has a malfunction. The message is missing. Brand	Network
Mercedes-Benz	U0698E0	Communication with coolant pump 2 of the low-temperature circuit has a malfunction. Brand	Network

6Related codes

Browse Uxxx codes or U069xx codes.