B1431: Wiper Brake/Run Relay Circuit Failure
CriticalBodyWipers & Washers
What does B1431 mean?
B1431 is a diagnostic trouble code indicating "Wiper Brake/Run Relay Circuit Failure". This code relates to your vehicle's wipers & washers and should be diagnosed to determine the root cause. The severity level helps indicate how urgently this should be addressed.
Symptoms you may notice
- Check engine light (MIL) illuminated on dashboard
- ABS warning light on
- Brake pedal feels different
- Unusual braking behaviour
- Intermittent warning lights
Estimated repair cost
Typical range in Australia (parts + labour)
$200 – $1000 AUD
Common causes
- Faulty wipers & washers component
- Wiring or connector issue in the related circuit
- Failed sensor providing incorrect readings
- Software/calibration issue requiring ECU update
- Related component causing secondary fault
What should you do?
This is a critical issue. Stop driving as soon as it is safe to do so and have the vehicle inspected immediately. Continuing to drive could cause further damage or pose a safety risk.
Get a diagnosis for YOUR car
Code B1431 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.