Brake System TPM Failure
There’s a problem with the brake system's traction/abs module.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The brake control module is detecting a fault that may prevent it from controlling the brakes properly, which can affect ABS and traction control operations.
What the computer is actually seeing
The ABS/traction control module monitors inputs from various wheel speed sensors and system status indicators. When it sees irregular data or loss of communication from these sensors, it sets code C1289.
What a healthy reading looks like
Expected voltages from wheel speed sensors are typically 0-12 volts AC depending on wheel speed. If signal drops below 0.5 volts or is inconsistent, it may trigger a fault.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Inspect the brake fluid level and top-off if low. Check for leaks that may cause low fluid.
- 2Visually inspect wiring and connections related to wheel speed sensors for damage or corrosion.
- 3Using a multimeter, check the wheel speed sensor output voltages while spinning the wheels. Expected output should be above 0.5 volts AC.
- 4Test the ABS module for proper communication with the vehicle's OBD system. Use a scanner to read live data and look for sensor performance.
Common causes
- Faulty wheel speed sensors
- Damaged wiring or connectors in brake system
- Malfunctioning ABS module
- Low brake fluid level
- Corrosion in brake system electronics
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to get this fixed soon. Braking performance might be compromised.
Will this code come back?
If the underlying issue isn't fixed, yes, the code will likely return.
Why does this code pair with C1288?
Both codes relate to issues in the brake system's traction control and ABS functionality, indicating sensor problems.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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