Is it safe to drive with this code?

The vehicle typically remains mechanically safe to drive—engine, brakes, and steering are unaffected—but adaptive cruise control and certain collision-avoidance features may be disabled or unreliable. Maintain a safe following distance manually and avoid relying on driver-assist systems until the fault is resolved. See our disclaimer for further guidance.

U043C itself may not trigger an automatic MOT failure, but what matters is whether the malfunction indicator lamp (MIL) remains illuminated at the time of test. If the dashboard warning light is on during the MOT, the vehicle may be refused. Refer to our site disclaimer for full details.

Roughly how much does it cost to fix?

Diagnosis often runs to low three-figure sums at an independent garage. If only cleaning or connector repair is needed, costs remain low two-figure. Sensor replacement typically falls into the mid three-figure bracket (parts and labour), though dealer pricing may reach high three-figure territory. Variation depends on whether the sensor requires recalibration and whether you use an independent workshop or franchised dealer.

Can I just clear the code and ignore it?

Clearing the code without addressing the underlying cause may temporarily extinguish the warning lamp, but the fault will commonly return once the system self-checks again. Persistent invalid data signals suggest a genuine hardware or wiring issue that requires physical inspection and repair.

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U043C

Network

Invalid Data Received From Cruise Control Front Distance Range Sensor

The vehicle's control network has detected that the data signal from the right-hand cruise control distance-ranging sensor is inconsistent or corrupted, typically affecting adaptive cruise control operation.

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ⓘ Information only. This page provides general educational information about fault code U043C. 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 U043C mean?

U043C is a Network (CAN bus, module communications) fault code. It indicates: Invalid Data Received From Cruise Control Front Distance Range Sensor.

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 Gearbox codes

Gearbox (transmission) codes report faults from the transmission control module: solenoid issues, fluid pressure problems, slipping clutches on dual-clutch boxes, and torque converter faults. Many trigger limp mode that locks the gearbox into a single forward gear.

U043C is one of 643 codes in this category. Browse all Gearbox codes →

What we know about U043C 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 U043C.

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 U043C in the U-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

U0439 Invalid Data Received From All Terrain Control Module

U043A Invalid Data Received From Suspension Control Module "B"

U043B Invalid Data Received From Cruise Control Front Distance Range Sensor

U0441 Invalid Data Received From Emissions Critical Control Information

U0443 Invalid Data Received From Body Control Module (BCM) "B"

U0444 Invalid Data Received From Body Control Module (BCM) "C"

Other Gearbox codes

Other fault codes in the same system as U043C. The ones with detailed guides have plain-English explanations, symptoms, causes, and diagnostic steps.

P0700

Transmission Control System Malfunction Detailed guide

P0701

Transmission Control System Range/Performance

P0702

Transmission Control System Electrical

P0703

Torque Converter/Brake Switch B Circuit

P0704

Clutch Switch Input Circuit Malfunction

P0705

Transmission Range Sensor Circuit Malfunction (PRNDL Input)

Spotted an issue or have something to add? Mechanics, technicians, and drivers who have first-hand experience with U043C 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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