Is it safe to drive with this code?

Driving is generally not recommended—whilst basic braking may still function, safety systems like ABS and electronic stability control may be disabled or unreliable, potentially increasing stopping distances and reducing vehicle stability in emergency situations (see our disclaimer).

It may affect your MOT result—what matters is whether the ABS or brake warning lamp is illuminated at the time of the test; an active warning light can lead to a fail, though the code itself isn't directly tested (see our disclaimer).

Roughly how much does it cost to fix?

Costs vary widely depending on the root cause. Simple connector cleaning or wiring repairs may fall in the low to mid three-figure range, whilst module reprogramming or software updates typically sit in the low to mid three-figure bracket. If a complete brake control module replacement is needed, costs can reach high three-figure to low four-figure sums, with variation driven by parts pricing, labour rates, and whether you use an independent garage or main dealer.

Can this code clear itself or recur intermittently?

Yes—intermittent wiring faults, loose connectors, or temporary voltage drops can cause the code to appear and disappear across driving cycles. If the underlying issue isn't resolved, the fault commonly returns, so professional diagnosis is advisable even if symptoms seem to vanish.

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← All fault codes | ABS / ESP

U0418

Network

Invalid Data Received From Brake System Control Module

The brake system control module is transmitting data that other vehicle systems cannot interpret correctly, typically indicating a communication fault on the vehicle network.

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ⓘ Information only. This page provides general educational information about fault code U0418. 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 U0418 mean?

U0418 is a Network (CAN bus, module communications) fault code. It indicates: Invalid Data Received From Brake System 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 ABS / ESP codes

Codes in this category relate to the anti-lock braking system (ABS) and electronic stability control (ESP/ESC). These systems share wheel speed sensors, hydraulic modulators, and a common control module. Faults here usually disable ABS pulse braking and stability control assistance, but standard hydraulic brakes continue working normally.

U0418 is one of 429 codes in this category. Browse all ABS / ESP codes →

What we know about U0418 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 U0418.

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 U0418 in the U-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

U0415 Invalid Data Received From Anti-Lock Brake System (ABS) Control Module

U0416 Invalid Data Received From Vehicle Dynamics Control Module

U0417 Invalid Data Received From Park Brake Control Module

U0419 Invalid Data Received From Steering Effort Control Module

U041B Invalid Data Received From Exhaust Gas Sensor Module

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

Other ABS / ESP codes

Other fault codes in the same system as U0418. The ones with detailed guides have plain-English explanations, symptoms, causes, and diagnostic steps.

B1106

Shift Lock Circuit Failure Detailed guide

C0021

Left Front Wheel Speed Sensor Circuit Detailed guide

C0035

Left Front Wheel Speed Sensor Circuit Range/Performance Detailed guide

C1000

Abnormality in Stoplight Switch Circuit Detailed guide

C1602

Manufacturer-Specific Chassis/ABS Fault Detailed guide

B1082

ORC-Occupant Restraint Control-Fps-Fire Protection Strategy-Activated

Spotted an issue or have something to add? Mechanics, technicians, and drivers who have first-hand experience with U0418 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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