Is it safe to drive with this code?

The vehicle may remain drivable in many cases, but the AWD system will likely be impaired or completely disabled, reducing traction and stability in challenging conditions such as rain, snow, or off-road surfaces—see our site disclaimer for safety guidance.

The code itself does not constitute an automatic failure, though if the malfunction indicator lamp is illuminated at the time of test, this may affect the outcome—see our MOT disclaimer for full details.

Roughly how much does it cost to fix?

Costs vary considerably depending on the root cause: a simple wiring repair may fall in the low two-figure range, whilst diagnostic scans and software updates typically sit in the low three-figure band; if the AWD control module requires replacement and reprogramming, expect mid to high three-figure costs, potentially reaching four-figure territory at main dealers due to parts, labour, and specialist programming.

Can a weak battery cause this code?

Yes, low battery voltage or unstable power supply can disrupt communication between control modules and may trigger network communication codes such as U041E, so checking the battery and charging system is often a sensible first step.

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← All fault codes | ECU

U041E

Network

Invalid Data Received From All Wheel Drive (AWD) Control Module

The vehicle's onboard computer has detected that the All Wheel Drive (AWD) control module is sending or receiving corrupted or inconsistent data over the network.

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ⓘ Information only. This page provides general educational information about fault code U041E. We do not assess the urgency or safety implications of any specific fault. That requires in-person diagnosis by a qualified mechanic. Full terms.

Recommended next steps

Whether a fault is urgent, drivable, or routine depends entirely on the cause on a specific vehicle, and that can only be determined by a qualified mechanic with diagnostic equipment. If a warning light is illuminated, the most reliable next step is professional diagnosis.

What does U041E mean?

U041E is a Network (CAN bus, module communications) fault code. It indicates: Invalid Data Received From All Wheel Drive (AWD) Control Module.

This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.

About ECU codes

Engine control unit (ECU) codes relate to the main engine computer itself, its memory, internal processors, supply voltage, or its ability to communicate with sensors and actuators. These are often electrical or wiring-related rather than mechanical faults.

U041E is one of 1,108 codes in this category. Browse all ECU codes →

What we know about U041E specifically

We record the SAE J2012 standardised definition and the system this code belongs to, but we have not yet published detailed driver-reported symptoms, common causes, or step-by-step diagnostic guidance for U041E.

Rather than invent that information by generating generic content from a template, we leave it out. For specific guidance, the most reliable sources are:

•your vehicle's own service manual or manufacturer-specific technical bulletins
•a qualified mechanic with a manufacturer-level diagnostic tool
•a marque specialist familiar with your make and model

Codes nearby

Codes adjacent to U041E in the U-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

U041B Invalid Data Received From Exhaust Gas Sensor Module

U041C Invalid Data Received From Rocker Arm Control Module "A"

U041D Invalid Data Received From Rocker Arm Control Module "B"

U0420 Invalid Data Received From Power Steering Control Module

U0421 Invalid Data Received From Suspension Control Module "A"

U0422 Invalid Data Received From Body Control Module (BCM)

Other ECU codes

Other fault codes in the same system as U041E. The ones with detailed guides have plain-English explanations, symptoms, causes, and diagnostic steps.

B1049

Passenger-Side Pre-Tensioner Seat Belt And Other Air Bag Module Circuits Short Detailed guide

P0606

ECM/PCM Processor Fault Detailed guide

U0001

High Speed CAN Communication Bus Detailed guide

U0100

Lost Communication With ECM/PCM Detailed guide

B1000

A/C Switch Request Input Circuit/Performance

B1001

Multiplex Integrated Control Unit (MICU) Internal Error

Spotted an issue or have something to add? Mechanics, technicians, and drivers who have first-hand experience with U041E can submit a correction or expansion. We review every submission before publishing, mechanic submissions are prioritised.

Information only, not professional advice

The information on this page is provided for general guidance and educational purposes only. It is not a substitute for diagnosis or repair advice from a qualified mechanic. Always verify any fault before paying for repairs. carfaultcodes.co.uk accepts no liability for decisions made based on this information. Full terms →

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