NetworkU05A3

Serious

Severity: Serious - have it checked soon

Invalid data received from reductant quality module

3 brands affected · Description from EOBD data.

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

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 3

Brand	Code	Description	System
Ashok Leyland CV	U05A3	No description available	Network
EOBD	U05A3	Invalid data received from reductant quality module Brand	Network
Tata	U05A3	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 26

These 7-character codes are manufacturer-specific variants of U05A3 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	U05A308	53724,509,S_COM_SENS_SENT_UREA_TANK: Es liegt ein Signalfehler vor oder die Botschaft ist fehlerhaft. Symptom-Name: COM_SENS_SENT_UREA_TANK Brand	Network
Sprinter	U05A308	53724,509,S_COM_SENS_SENT_UREA_TANK: Es liegt ein Signalfehler vor oder die Botschaft ist fehlerhaft. Symptom-Name: COM_SENS_SENT_UREA_TANK Brand	Network
Mercedes-Benz	U05A329	53724,535,S_DATA_SIG_SENS_SENT_1_UREA_TANK: Es liegt ein ungültiges Signal vor. Symptom-Name: DATA_SIG_SENS_SENT_1_UREA_TANK Brand	Network
Sprinter	U05A329	53724,535,S_DATA_SIG_SENS_SENT_1_UREA_TANK: Es liegt ein ungültiges Signal vor. Symptom-Name: DATA_SIG_SENS_SENT_1_UREA_TANK Brand	Network
Mercedes-Benz	U05A341	53724,544,S_DATA_CHK_SENS_SENT_UREA_TANK: Es liegt ein allgemeiner Prüfsummenfehler vor. Symptom-Name: DATA_CHK_SENS_SENT_UREA_TANK Brand	Network
Sprinter	U05A341	53724,544,S_DATA_CHK_SENS_SENT_UREA_TANK: Es liegt ein allgemeiner Prüfsummenfehler vor. Symptom-Name: DATA_CHK_SENS_SENT_UREA_TANK Brand	Network
Mercedes-Benz	U05A381	53724,573,S_INI_SENS_SENT_UREA_TANK: Falsche Daten wurden empfangen. Symptom-Name: INI_SENS_SENT_UREA_TANK Brand	Network
Sprinter	U05A381	53724,573,S_INI_SENS_SENT_UREA_TANK: Falsche Daten wurden empfangen. Symptom-Name: INI_SENS_SENT_UREA_TANK Brand	Network
Mercedes-Benz	U05A383	53724,23597,S_UCLS_NOT_VLD_3: Symptom-Name: UCLS_NOT_VLD Brand	Network
Sprinter	U05A383	53724,23597,S_UCLS_NOT_VLD_3: Symptom-Name: UCLS_NOT_VLD Brand	Network
Mercedes-Benz	U05A386	53724,576,S_UCLS_NOT_VLD_3: Symptom-Name: UCLS_NOT_VLD Brand	Network
Sprinter	U05A386	53724,576,S_UCLS_NOT_VLD_3: Symptom-Name: UCLS_NOT_VLD Brand	Network
Mercedes-Benz	U05A387	53724,577,S_UCLS_NOT_VLD_3: Symptom-Name: UCLS_NOT_VLD Brand	Network
Sprinter	U05A387	53724,577,S_UCLS_NOT_VLD_3: Symptom-Name: UCLS_NOT_VLD Brand	Network
Mercedes-Benz	U05A38F	53724,578,S_UCLS_NOT_VLD_3: Symptom-Name: UCLS_NOT_VLD Brand	Network
Sprinter	U05A38F	53724,578,S_UCLS_NOT_VLD_3: Symptom-Name: UCLS_NOT_VLD Brand	Network
Mercedes-Benz	U05A393	53724,1441,S_UCLS_NOT_VLD_3: Symptom-Name: UCLS_NOT_VLD Brand	Network
Sprinter	U05A393	53724,1441,S_UCLS_NOT_VLD_3: Symptom-Name: UCLS_NOT_VLD Brand	Network
Mercedes-Benz	U05A3FA	53724,1439,S_UCLS_NOT_VLD_0: Symptom-Name: UCLS_NOT_VLD Brand	Network
Sprinter	U05A3FA	53724,1439,S_UCLS_NOT_VLD_0: Symptom-Name: UCLS_NOT_VLD Brand	Network
Mercedes-Benz	U05A3FB	53724,501,S_UCLS_NOT_VLD_1: Symptom-Name: UCLS_NOT_VLD Brand	Network
Sprinter	U05A3FB	53724,501,S_UCLS_NOT_VLD_1: Symptom-Name: UCLS_NOT_VLD Brand	Network
Mercedes-Benz	U05A3FC	53724,501,S_UCLS_NOT_VLD_2: Symptom-Name: UCLS_NOT_VLD Brand	Network
Sprinter	U05A3FC	53724,501,S_UCLS_NOT_VLD_2: Symptom-Name: UCLS_NOT_VLD Brand	Network
Mercedes-Benz	U05A3FD	53724,501,S_UCLS_NOT_VLD_3: Symptom-Name: UCLS_NOT_VLD Brand	Network
Sprinter	U05A3FD	53724,501,S_UCLS_NOT_VLD_3: Symptom-Name: UCLS_NOT_VLD Brand	Network

6Related codes

Browse Uxxx codes or U05Axx codes.