C0141 – Meaning, Symptoms, Causes & How to Fix It

C0141 is an ABS/traction control related trouble code that can be a bit confusing when it pops up on your scan tool. You might notice the ABS light, traction control light, or stability control light on, and maybe some changes in braking behavior. This code usually points to a problem with the brake pedal switch circuit or a related ABS control circuit. The good news is that with some basic tools and a logical approach, you can narrow down the cause and decide whether it’s a DIY fix or a job for a professional.

What Does C0141 Mean?

C0141 is a chassis (C) diagnostic trouble code commonly defined as “Brake Switch Circuit Malfunction” or “Brake Switch Circuit Failure” in many ABS and stability control systems. On some makes, it may be described as a “Brake Control Circuit” or “ABS Control Circuit” fault, but it almost always involves the brake pedal switch signal not matching what the ABS/ESC module expects.

In plain terms, the ABS module is not seeing the correct on/off signal from the brake pedal switch, or the voltage in that circuit is out of range. When that happens, the system may disable ABS, traction control, or stability control and turn on warning lights.

Quick Reference

Code: C0141
System: ABS / Traction Control / Stability Control
Typical Meaning: Brake switch circuit malfunction
Severity: Moderate – affects ABS/ESC, base brakes usually still work
Common Fixes: Brake pedal switch replacement, wiring repair, connector cleaning

Real-World Example / Field Notes

In the shop, C0141 often shows up on vehicles where the owner noticed the ABS and traction control lights come on after a few minutes of driving. A common pattern is that the brake lights work intermittently or stay on after you release the pedal. On a late-model SUV I worked on, the owner had already replaced pads and rotors, thinking it was a brake issue, but the real culprit was a worn-out brake pedal switch that was sending a weak signal to the ABS module. A quick test with a multimeter and a new switch solved the code and restored ABS and stability control.

Symptoms of C0141

ABS warning light on – The ABS indicator stays illuminated on the dash.
Traction control or ESC light on – Stability or traction control lamp may also turn on.
Brake warning light – In some vehicles, the red brake warning light can illuminate.
Loss of ABS function – Wheels may lock during hard braking on slippery surfaces.
Traction control disabled – Reduced traction assistance during acceleration on low-grip roads.
Intermittent brake lights – Brake lamps may stay on, not come on, or flicker.
Harsh or inconsistent shifting – On some models, the transmission logic is affected by incorrect brake switch input.

Common Causes of C0141

Most Common Causes

Faulty brake pedal switch: The internal contacts wear out, stick, or fail, causing incorrect voltage or no signal to the ABS/ESC module.
Misadjusted brake switch: The switch is not positioned correctly on the pedal, so it does not fully open or close when you press or release the brake.
Damaged wiring at the pedal area: Wires can get pulled, pinched, or broken around the steering column or pedal bracket.
Corroded connectors: Moisture or spilled drinks can cause corrosion in the brake switch or ABS harness connectors, increasing resistance.
Low system voltage or weak battery: On some models, low voltage can trigger C0141 when the ABS module sees erratic brake switch readings.

Less Common Causes

Faulty ABS/ESC control module: Internal failure in the module’s input circuitry can misread a good brake switch signal.
Aftermarket electrical accessories: Poorly installed remote starters, alarms, or LED brake lights can interfere with the brake switch circuit.
Incorrect replacement switch: Using the wrong type of brake switch (wrong pin count or logic) can cause a mismatch with the ABS module.
Ground issues: Loose or corroded chassis grounds affecting the ABS module or brake light circuit.

Diagnosis: Step-by-Step Guide

To diagnose C0141 properly, you should have a basic scan tool capable of reading ABS codes, a digital multimeter (DMM), and ideally a wiring diagram for your specific vehicle. A test light and a back-probing kit are also very helpful. If you have access to a more advanced scan tool that can read live data and Mode $06, you can confirm the brake switch signal in real time.

Confirm the code and record data: Use a scan tool to read all stored and pending codes. Note freeze-frame data such as vehicle speed, brake status, and voltage when C0141 set.
Check warning lights and basic operation: Turn the key on and verify which lights are on (ABS, traction, brake). Confirm whether the brake lights work normally when you press and release the pedal.
Inspect the brake pedal switch: Locate the switch at the top of the brake pedal arm. Look for physical damage, loose mounting, or signs of fluid or drink spills around the area.
Verify switch adjustment: Make sure the switch plunger contacts the pedal properly. If it is too far away or too tight, adjust it per the service manual so it fully changes state when you press the pedal.
Electrical test of the brake switch: Unplug the connector and use a multimeter to check continuity across the correct terminals with the pedal released and pressed. You should see a clear open/closed change. If not, the switch is likely bad.
Check power and ground at the switch: With the key on, verify you have proper battery voltage on the feed wire and a good ground or reference on the other side, according to the wiring diagram.
Inspect wiring and connectors: Follow the harness from the brake switch to the ABS/ESC module as far as you can. Look for chafed insulation, pinched wires, or green/white corrosion at connectors. Repair any damaged sections.
Use scan tool live data: In the ABS or powertrain data list, look for “Brake Switch,” “Brake Pedal Position,” or similar PIDs. Press and release the pedal and confirm the ECU sees a clean on/off change without flickering.
Clear codes and road test: After repairs or adjustments, clear C0141 and perform a road test. Accelerate and brake several times at different speeds. Re-scan to confirm the code does not return.
Evaluate ABS module only after basics: If the switch, wiring, and power/grounds are all good but C0141 keeps returning, then consider ABS/ESC module testing or replacement, ideally with professional help.

Pro tip: When testing the brake switch, gently wiggle the harness while watching live data or meter readings. If the signal cuts in and out as you move the wires, you likely have an intermittent wiring or connector issue rather than a bad switch.

Possible Fixes & Repair Costs

The exact repair for C0141 depends on what you find in diagnosis, but most fixes are straightforward. Common repairs include replacing the brake pedal switch, adjusting the switch position, cleaning or repairing connectors, and fixing damaged wiring. In rare cases, the ABS/ESC module may need replacement and programming.

Brake pedal switch replacement: Often a quick job; many vehicles take 15–30 minutes.
Brake switch adjustment: Simple adjustment with basic tools, sometimes no parts needed.
Wiring or connector repair: Splicing in new wire, cleaning corrosion, or replacing a pigtail connector.
ABS/ESC module replacement: More involved; may require programming with factory-level equipment.

Typical repair costs for C0141 range from about $75–$200 for a brake switch replacement at an independent shop, including parts and labor. Wiring repairs can run $100–$300 depending on how deep the harness damage is. If the ABS module is faulty, you may be looking at $600–$1,200 or more, especially at a dealership. Costs vary with vehicle make, parts availability, and labor rates in your area.

Can I Still Drive With C0141?

In most cases, you can still drive with C0141, but you need to understand the risk. Your standard hydraulic brakes should still work, so the car will stop. However, ABS, traction control, and stability control may be disabled or limited. That means on wet, icy, or loose surfaces, your stopping distance can increase and the vehicle may be more likely to skid or lose traction. Short trips to a repair shop are usually fine if you drive cautiously, but you should avoid aggressive driving and high-speed highway use until the issue is fixed.

What Happens If You Ignore C0141?

If you ignore C0141, you are essentially driving without the safety net of ABS and stability control. Over time, an intermittent brake switch or wiring issue can worsen, potentially affecting your brake lights or transmission logic as well. In an emergency stop or on a slippery road, the lack of ABS/ESC can be the difference between a controlled stop and a loss of control or collision. It is best to address the code sooner rather than later.

Last updated: March 1, 2026

Key Takeaways

C0141 usually means the ABS/ESC system is not seeing a proper brake pedal switch signal.
Common causes include a bad or misadjusted brake switch, wiring problems, or corroded connectors.
Symptoms often include ABS, traction control, or brake lights on, and loss of ABS/ESC functions.
Diagnosis focuses on checking the switch, wiring, and live data from the ABS module.
Most fixes are affordable, but ignoring the code can compromise your safety in emergency situations.

Vehicles Commonly Affected by C0141

C0141 is especially common on many GM vehicles, including Chevrolet, GMC, Buick, and Cadillac SUVs and trucks, where the brake pedal switch and ABS wiring see a lot of use. It also appears on various Toyota and Lexus models with advanced stability control systems, as well as some Hyundai, Kia, and Nissan vehicles. You will see it more frequently on cars and SUVs equipped with traction control and ESC, since those systems rely heavily on accurate brake switch input.

FAQ

Is C0141 a serious problem?

C0141 is serious in the sense that it can disable ABS and stability control, which are important safety systems. Your basic brakes still work, but your ability to stop quickly and maintain control on slippery roads is reduced, so you should repair it as soon as possible.

Can I fix C0141 myself at home?

If you are comfortable with basic tools and electrical checks, you can often fix C0141 yourself, especially if the issue is just a faulty brake pedal switch or a simple adjustment. More complex wiring or ABS module problems are better left to a professional with proper diagnostic equipment.

What is the most common cause of C0141?

The most common cause is a worn or failing brake pedal switch. Over time, the internal contacts can stick or lose tension, causing an unreliable signal to the ABS/ESC module and triggering the code.

Can a weak battery or charging problem cause C0141?

Yes, on some vehicles low system voltage can contribute to C0141 by making the ABS module see erratic brake switch readings. If you also notice slow cranking, dim lights, or charging system warnings, it is worth checking the battery and alternator.

Is it safe to clear C0141 and keep driving if it does not come back immediately?

You can clear the code after checking the basics, but if the underlying problem is still there, C0141 will usually return. If it does not come back after a proper road test, it may have been intermittent. Still, keep an eye on your warning lights and address the issue if the code or symptoms reappear.

C0141 – Lateral Acceleration Sensor Circuit Low