Is it safe to drive with this code?

Driving is possible as conventional braking typically remains operational, but ABS and traction control functions may be disabled, which can compromise emergency stopping and stability on slippery surfaces; extended driving is not recommended, particularly in adverse weather—see our site disclaimer for further guidance.

The MOT may be affected if the ABS warning lamp is illuminated at the time of test, as this constitutes a fault in a safety-critical system; what matters is the presence of the warning light during inspection—refer to our disclaimer for MOT-related queries.

Roughly how much does it cost to fix?

If the cause is simply a faulty brake switch, repairs often fall into the low two-figure to low three-figure range including parts and labour; however, if damaged wiring requires extensive repair or the ABS module itself needs replacement, costs can reach mid to high three-figure sums or even four-figure territory at main dealers—variation depends on the specific fault, vehicle make, and whether you use an independent garage or franchised workshop.

Can this code affect my cruise control?

Yes, many vehicles disable cruise control when the brake switch circuit malfunctions, as the system relies on an accurate brake-pedal signal to disengage safely; restoring proper brake switch operation commonly resolves cruise control faults that appear alongside C0161.

Professional mechanic working in workshop

← All fault codes | ABS / ESP

C0161

Chassis

ABS/TCS Brake Switch Circuit

The ABS control module has detected an implausible signal from the brake switch circuit, which may affect the proper operation of the anti-lock braking and traction control systems.

garage.co.uk

Need a garage?

Compare quotes from verified UK garages near you.

→

car.co.uk

Sell your car

We specialise in problem cars: warning lights, faults, high mileage. Fair instant offer.

→

trader.co.uk

List your car

Free private listing. Reach thousands of UK buyers, no fees.

→

ⓘ Information only. This page provides general educational information about fault code C0161. 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 C0161 mean?

C0161 is a Chassis (ABS, traction control, steering) fault code. It indicates: ABS/TCS Brake Switch Circuit.

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.

C0161 is one of 429 codes in this category. Browse all ABS / ESP codes →

What we know about C0161 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 C0161.

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 C0161 in the C-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

C0150 Right Front ABS Solenoid Valve Relay Circuit Stuck Open

C0151 Left Rear ABS Solenoid Valve Relay Circuit Stuck Open

C0152 Right Rear ABS Solenoid Valve Relay Circuit Stuck Open

C0162 ABS/TCS Brake Switch Circuit Range/Performance

C0163 ABS/TCS Brake Switch Circuit Low

C0164 ABS/TCS Brake Switch Circuit High

Other ABS / ESP codes

Other fault codes in the same system as C0161. 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 C0161 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 →

✎

Help us improve the C0161 page

Spotted an error, missing detail, or have first-hand experience to add? Tell us, we review every submission.