In most cases, you should not rely on or drive with a faulty electronic parking brake. If the system won’t release, drags, or shows a fault, arrange service or towing. You may be able to move short distances using conventional brakes, but do not rely on the EPB to secure the vehicle when parked and have the system diagnosed promptly.
Understanding the risk and how it happens
The electronic parking brake (EPB) uses an electric motor or actuator to apply and release the brakes that normally hold the car in place when parked. Failures can stem from wiring, sensors, a faulty control unit, or issues within the caliper mechanism. When the EPB malfunctions, the car may not stay parked, may fail to release, or could engage unexpectedly, posing a roll-away risk or brake overheating if the system drags while driving.
Can you drive with an EPB malfunction?
When the EPB system shows a fault, the safest approach depends on the symptom and your vehicle. The guidance below offers practical steps for typical scenarios. Always consult your owner’s manual for model-specific instructions, as some cars provide temporary workarounds or require towing for safety.
Before you proceed with any steps, assess the situation: is the warning light on, or is the brake physically dragging? If the brake is stuck or you cannot release it, do not continue driving—seek roadside assistance.
- Safely slow down and pull over to a safe location as soon as you can, using normal braking. Turn on hazard lights to alert other drivers.
- Check your owner’s manual for any emergency or temporary override procedures the manufacturer may provide. Do not force components or employ unverified methods.
- If the car can be moved without excessive resistance, proceed at very low speeds and limit the distance to the nearest service center or dealership. Do not rely on the EPB to hold the vehicle when parked.
- Have the vehicle towed if you cannot confidently release the brake or if the system remains Faulty after attempting basic procedures.
These steps are intended to minimize risk and guide you toward professional service. Do not drive long distances or on busy roads if the EPB fault persists or the brakes behave abnormally.
What to do if the parking brake is stuck or will not release
If the parking brake is physically stuck on or refuses to release, treat it as a brake system fault that requires inspection by a technician. The following actions are commonly advised, but always prioritize the manual for your specific vehicle.
- Safely stop and avoid further use of the brake until you can get a professional assessment.
- Follow the vehicle’s emergency release procedure if the owner’s manual provides one. Some systems offer a way to override the EPB release, but this should only be done per manufacturer instructions.
- Do not attempt to drive long distances with the brake engaged, as this can overheat brake components, wear pads and rotors, or cause a dangerous loss of braking efficiency.
- Call roadside assistance or have the vehicle towed to a dealership or qualified repair shop for diagnosis and repair.
Use caution: attempting unapproved manual overrides or forcing components can create safety risks or further damage.
What to expect at a repair shop
When you bring a vehicle with an EPB fault to a service center, technicians typically follow a structured diagnostic approach to identify the cause and the best fix. The usual steps include:
- Diagnostic scan of the EPB control unit to read fault codes and history.
- Inspection of electrical connections, wiring harnesses, and the parking brake actuator/caliper for corrosion or damage.
- Assessment of the brake-fluid system and hydraulic lines if the EPB interacts with hydraulic components.
- Calibration or re-initialization of the EPB system after any component replacement or software updates.
- Repair or replacement of defective parts, followed by a test to confirm proper engagement and release of the parking brake.
Expect potential software updates or recalibration to ensure the EPB communicates correctly with other vehicle systems. The exact steps may vary by make and model.
Summary
Electronic parking brake malfunctions create safety considerations that differ from traditional brakes. If the EPB warning is present, do not rely on the system to hold the vehicle or to release during driving. Safely park, consult the owner’s manual for any approved emergency procedures, and seek professional service promptly. In most cases, you can resume normal driving with the standard braking system, but a qualified technician should diagnose and repair the EPB to ensure reliable parking and braking in the future. If the brake is stuck or cannot be released, avoid driving and arrange towing to a dealership for repair.