Chevrolet Sonic Brake Pedal Position Sensor Guide (2012-2020)
Understanding the symptoms and replacement of a faulty brake pedal position sensor in your 2012-2020 Chevrolet Sonic.
- A faulty sensor is a critical safety issue as it can cause your brake lights to fail.
- Symptoms are not just limited to brake lights; it can also disable cruise control, trigger ABS/Traction lights, and even prevent the car from starting.
- Replacement is a simple, DIY-friendly job, but the new sensor must be calibrated with a scan tool to function correctly.
- ACDelco and Standard Ignition are both reliable aftermarket choices for this part.
Is Your Chevrolet Sonic Showing Signs of a Bad Brake Pedal Position Sensor?
A failing brake pedal position sensor on a 2012-2020 Chevrolet Sonic can cause a number of confusing electrical issues. Because this one sensor communicates with multiple systems, its failure can trigger warning lights and problems that don't seem related to the brakes at first. Understanding these symptoms is the first step to a correct diagnosis.
Common Failure Symptoms
- Brake Lights Not Working or Stuck On: The most direct symptom is your brake lights failing to illuminate when you press the pedal, or staying on even when your foot is off the brake. This is a major safety hazard.
- Cruise Control Won't Engage: The cruise control system relies on the sensor to know when to disengage. If the sensor is faulty, the system may think the brakes are being applied and will prevent cruise control from turning on.
- ABS and Traction Control Lights: A bad sensor can send faulty data to the ABS and traction control modules, causing their warning lights to appear on your dashboard.
- Car Won't Start: On models with a push-button start, you must press the brake pedal to start the engine. If the sensor fails, the car won't get the signal that the brake is pressed, and the engine will not start.
- Check Engine Light: A fault in the sensor's circuit can trigger a Check Engine Light. The most common trouble code associated with this failure is P057C 🎬 Watch: How to fix the P057C code on your Sonic (Brake Pedal Position Sensor Circuit Low Voltage).
Choosing the Right Aftermarket Sensor for Your Sonic
For a part like this, you don't necessarily need to go to the dealer. Quality aftermarket brands offer reliable replacements. There have been no major safety recalls for this specific sensor on the Sonic, which means the original design is sound and well-replicated by aftermarket manufacturers.
Brand Quality Tiers
- Tier 1 (OEM Equivalent): ACDelco
ACDelco is General Motors' own parts brand. Choosing an ACDelco sensor is the closest you can get to buying the original part your Sonic was built with. They offer different product lines, with "GM Original Equipment" being identical to the factory part and their "Professional" series offering high-quality aftermarket alternatives. For an electronic sensor critical to safety systems, ACDelco is a trusted choice. - Tier 2 (Quality Aftermarket): Standard Ignition (SMP)
Standard Motor Products is a well-respected name in the aftermarket industry, known for producing reliable electronic components. For many professional mechanics, Standard is a go-to brand when an OEM part isn't necessary. Their sensors are engineered to meet or exceed original specifications and provide a dependable, cost-effective repair.
Cost of Replacing a Chevrolet Sonic Brake Pedal Position Sensor
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Part | $23 - $74 |
| New OEM Part (Dealer) | $45 - $90 |
| Shop Labor | $50 - $100 |
| Total Professional Repair | $73 - $190 |
Cost estimates are for parts and labor and may vary by location and repair shop.
Frequently Asked Questions (FAQ)
Is a brake light switch the same as a brake pedal position sensor?
Yes, for the Chevrolet Sonic, these terms are often used for the same part. It serves both functions: switching the brake lights on and sensing the pedal's position for other computer systems.
Can I replace this sensor myself?
Yes, this is a DIY-friendly job for most people. It involves removing a lower trim panel under the steering wheel, disconnecting the electrical plug, and removing one bolt. The most difficult 🎬 See this step-by-step sensor removal and replacement walkthrough part is working in a tight space. Remember that a calibration procedure is needed after installation.
Why did my traction control and brake warning lights come on at the same time?
This is a common symptom of a failing brake pedal position sensor. The traction control system needs to know if you are braking. When the sensor provides an incorrect or no signal, the system flags an error and illuminates the warning light as a precaution.
Will a bad sensor always cause a Check Engine Light?
Not always. Sometimes the only symptoms are malfunctioning brake lights or cruise control without any warning lights on the dash. However, if the sensor's electrical circuit fails, it will likely store a fault code like P057C and turn on the Check Engine Light.
Helpful Videos
Technical Specifications
OEM Part Numbers: 13597429 13583311 25912943
Located on the brake pedal bracket, this sensor is a switch-type sensor that communicates pedal position to the BCM and ECM. It typically has a single bolt for mounting and an electrical connector. A calibration is required after installation.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Chevrolet Sonic:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Chevrolet Sonic Showing Signs of a Bad Brake Pedal Position Sensor?
- Common Failure Symptoms
- Choosing the Right Aftermarket Sensor for Your Sonic
- Brand Quality Tiers
- Cost of Replacing a Chevrolet Sonic Brake Pedal Position Sensor
- Frequently Asked Questions (FAQ)
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