Is it safe to drive with C0245?

Your everyday brakes still work, so you can stop normally. But ABS, traction control, and stability control are usually disabled while this code is active, so you lose that help in hard or slippery stops. It's fine to drive gently to get it fixed, but don't count on anti-lock or traction assistance until it's repaired.

How is a frequency/plausibility code different from an open-circuit code?

An open- or short-circuit code means the signal is missing or electrically broken. C0245 means the signal is present but implausible — one wheel's reading deviates too much from the others. That points less at a dead sensor and more at things that distort the signal: a damaged tone ring, a bad air gap, bearing play, or intermittent wiring.

Which wheel is at fault?

C0245 flags the condition rather than always naming a corner, so watch live wheel-speed data while driving to see which wheel reads erratically or disagrees with the rest. Companion corner-specific codes (like C0035, C0040, C0045, or C0050) can also point you to the wheel. Confirm the exact interpretation in service data for your make.

Can a wheel bearing cause this code?

Yes. Too much play in a wheel bearing lets the sensor and tone ring move relative to each other, which changes the air gap and distorts the frequency the module reads. On vehicles where the tone ring is built into the bearing/hub, a worn hub can both cause the code and require replacing the sensor ring at the same time.

OBD-II trouble code

C0245: Wheel Speed Sensor Frequency Malfunction

The ABS module detected an illogical or inconsistent wheel speed signal — one wheel's reading disagrees with the others. ABS and traction/stability control may be disabled, but your normal brakes still work.

Quick facts

System: Chassis
Category: ABS / Wheel Speed
Severity: Medium severity
Drivable: Usually safe to drive short-term
Repair cost range: $100 – $500
DIY difficulty: Intermediate DIY

What does C0245 mean?

Each wheel has a speed sensor that feeds the electronic brake control module (EBCM) an alternating-current square-wave signal as the wheel turns; the module uses the frequency of that signal (how many pulses per second) to calculate each wheel's speed. C0245 sets when the module sees a signal that is present but doesn't make sense — one wheel's frequency deviates from the average of the others by more than an allowed threshold, or the signal is erratic and implausible. Unlike a simple open- or short-circuit code, this is a range/plausibility fault: the sensor is reporting, but the number it reports is wrong.

Because anti-lock braking, traction control, and stability control all depend on trustworthy wheel-speed data, the module responds to an implausible reading by disabling those functions and turning on the ABS and traction/stability warning lights. Your ordinary hydraulic brakes are unaffected — the pedal stops the car normally — but the electronic assistance is switched off until the fault clears.

The most common cause is a failing wheel speed sensor, but the signal can also be corrupted by a damaged tone/reluctor ring, an incorrect air gap between the sensor and ring, debris or rust on the ring, a wheel bearing with too much play (which lets the sensor and ring move relative to each other), or intermittent wiring. Because the fault is about the quality of the signal rather than its presence, it often shows up intermittently or only at certain speeds. C0245 is common on GM vehicles but the definition and which wheel is implicated can vary by manufacturer and system, so confirm in service data for your specific vehicle.

Common causes

Failing wheel speed sensor producing an erratic or weak signal
Damaged, cracked, or contaminated tone/reluctor ring
Incorrect sensor-to-ring air gap or a loose sensor
Excessive wheel bearing play allowing sensor/ring movement
Debris, rust, or metal filings on the tone ring
Chafed, corroded, or intermittent wiring or connector in the sensor circuit

Symptoms

ABS warning light on
Traction control and stability control warning lights on
ABS, traction, and stability features disabled
Normal (base) braking still works
Symptoms may come and go or appear only at certain speeds

Diagnostic steps

1.Scan the ABS module and record C0245 plus any specific wheel-speed codes (C0035/C0040/C0045/C0050) that identify a corner.
2.View live wheel-speed data with a scan tool and drive the vehicle; watch for one wheel reading erratically or disagreeing with the others.
3.Raise the vehicle and inspect the suspect sensor, its wiring, and connector for damage, corrosion, or looseness.
4.Inspect the tone/reluctor ring for cracks, missing teeth, rust, or debris, and check the sensor-to-ring air gap.
5.Check for wheel bearing play, which can let the sensor and ring shift and corrupt the signal.
6.Compare the sensor's output against specification (or swap-test with a known-good sensor where practical), then replace the faulty component and clear the code.

Repair cost

$100 – $500

A wheel speed sensor commonly runs $30-$200 in parts with about $80-$200 labor per wheel, so a typical replacement lands around $150-$350. If the tone/reluctor ring is damaged it may be integrated with the wheel bearing/hub, which pushes the job toward a $250-$500+ hub-and-bearing replacement. A wiring or connector repair can be much cheaper — confirm the exact cause before buying parts.

Estimate your repair

Run the numbers for your vehicle

Open the Repair Cost Estimator with wheel speed sensor replacement preselected. Adjust labor rate and vehicle category to fit your situation.

Estimate your repair cost

DIY vs shop

This is an intermediate DIY job. It usually involves diagnostic steps, specialty parts, and some careful work in tight spaces. If you have the tools and a service manual or trustworthy video for your specific vehicle, it is achievable in a weekend. Otherwise, a competent independent shop will be faster.

Related codes

C0035 C0040 C0045 C0050