Is it safe to drive with this code?

Conventional braking typically remains functional, but ABS assistance on the left front wheel may be compromised or disabled entirely. Stopping distances can increase on wet or slippery surfaces, and handling during emergency braking may be unpredictable. Continued driving is possible for short distances at reduced speeds, but repairs should be arranged promptly—see our disclaimer for further guidance.

It may affect the MOT outcome if the ABS warning lamp is illuminated at the time of the test, as this is assessed under the braking-system checks. Whether the vehicle fails depends on the tester's findings during the brake-performance test and lamp inspection—refer to our MOT disclaimer for full details.

Roughly how much does it cost to fix?

Costs vary widely depending on the root cause. Wiring repairs or cleaning corroded connectors may fall into the low two-figure range, whilst ABS module reconditioning by a specialist often runs into the low to mid three-figure bracket (commonly £150–£350). Full module replacement at a main dealer, including coding and calibration, can reach the high three-figure to low four-figure range. Independent specialists and mail-order remanufacturers usually offer better value than main-dealer parts.

Can I just clear the code and keep driving?

Clearing the code without addressing the underlying fault will typically result in the warning lamp returning shortly after the engine is restarted or during the next drive cycle. The ABS system runs self-checks continuously, so a genuine relay fault will be re-detected. Proper diagnosis and repair are needed for a lasting solution.

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← All fault codes | ABS / ESP

C0145

Chassis

Left Front ABS Solenoid Valve Relay Circuit Stuck Closed

The ABS control module has detected that the relay circuit powering the left front wheel's solenoid valve appears to be stuck in the closed position, which may affect anti-lock braking performance on that wheel.

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ⓘ Information only. This page provides general educational information about fault code C0145. 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 C0145 mean?

C0145 is a Chassis (ABS, traction control, steering) fault code. It indicates: Left Front ABS Solenoid Valve Relay Circuit Stuck Closed.

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.

C0145 is one of 429 codes in this category. Browse all ABS / ESP codes →

What we know about C0145 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 C0145.

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 C0145 in the C-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

C0142 Right Front ABS Solenoid Valve Relay Circuit

C0143 Left Rear ABS Solenoid Valve Relay Circuit

C0144 Right Rear ABS Solenoid Valve Relay Circuit

C0146 Right Front ABS Solenoid Valve Relay Circuit Stuck Closed

C0147 Left Rear ABS Solenoid Valve Relay Circuit Stuck Closed

C0148 Right Rear ABS Solenoid Valve Relay Circuit Stuck Closed

Other ABS / ESP codes

Other fault codes in the same system as C0145. 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 C0145 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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