By Core Brake Parts Tech Team — Circleville, OH warehouse
An ABS light on a 2011-2019 Chevrolet Cruze means the electronic brake control module (EBCM) has found a fault and has switched antilock braking off. If the red brake warning light is not also on, the car still has normal brakes, just not ABS. On this car the most common cause is a wheel speed sensor signal problem, and GM documented a specific one: metal debris stuck to the magnetic encoder ring on the wheel bearing hub.
What the ABS Light Means on a Cruze
The Cruze owner's manual is clear on how to read the dash. The ABS light should come on briefly at start-up and then go out. If it comes on and stays on while driving, GM says to stop when it is safe, turn the ignition off, and restart to reset the system. If the light stays on after driving above 13 mph (20 km/h), the car needs service.
The key detail is which other lights are lit:
- ABS light only: the manual states the vehicle still has brakes, but not antilock brakes. You can drive carefully, but hard stops on wet or loose surfaces can lock a wheel.
- ABS light plus the red brake system warning light: the manual states there is also a problem with the regular brakes. Treat this as a do-not-drive condition until it is checked. Low brake fluid is one thing that turns the red light on.
- ABS plus Traction Control/StabiliTrak lights or "Service StabiliTrak" messages: this is typical of a wheel speed fault. Traction control and stability control use the same wheel speed data, so when the EBCM loses a sensor it shuts all three down together.
The manual also notes that a brief motor or clicking noise and a small pedal movement when you first pull away is the ABS self-test, and is normal.
Cause 1: Debris on the Wheel Speed Encoder Ring (GM Bulletin PIC5428D)
GM issued Preliminary Information bulletin PIC5428D covering the 2011-2013 Cruze (along with many other GM models) for exactly this complaint: ABS, Service Traction Control and Service StabiliTrak lights on, sometimes with a brief click, ratchet or ABS pump noise at parking-lot speeds, or a traction light that flashes at low speed.
The reason is how the Cruze reads wheel speed. Instead of a steel toothed tone ring, the bearing hub carries a magnetized rubber encoder ring (typically brown) with alternating north and south poles. The sensor reads those poles as the wheel turns. Because the ring is a magnet, it collects ferrous metal debris, and a chip stuck to it can distort the signal.
The bulletin lists the codes and the corner each one points to:
| ABS code | Wheel |
|---|---|
| C0035 | Left front |
| C0040 | Right front |
| C0045 | Left rear |
| C0050 | Right rear |
GM's fix for these codes (with symptom bytes 18, 5A or 0F) is to inspect that corner's encoder ring and clean off the debris with a dry, soft nylon brush, then mild soap and water if needed. GM notes that most repairs need no new bearing hub or sensor. Two cautions from the bulletin matter for DIYers: do not damage the bearing's outer seal while cleaning, and never use a magnetic tool to pick debris off, because an external magnet can damage the encoder. On some applications the hub has to come off to reach the ring properly.
Cause 2: Sensor, Wiring or Connector Faults
If the encoder ring is clean, look at the circuit. The Cruze uses an active magnetic encoder system, and Brake and Front End magazine explains that active (magnetoresistive) sensors are powered, produce a square-wave signal, and can read wheel speed right down to zero. Common trouble spots are:
- Broken or chafed sensor wiring, especially where the harness flexes with the suspension or runs near the brake line.
- Corroded or loose connectors. A low-amplitude or dropping signal can come from high resistance at a connector.
- Rust or dirt under the sensor head changing the gap between the sensor and the encoder.
- A damaged encoder ring, which on this car is part of the bearing hub.
Because the wheel speed data is shared across the network with traction and stability control, one bad sensor can set codes that look unrelated. Always start with the stored codes rather than guessing.
Cause 3: Brake Fluid and Recent Brake Work
A low brake fluid level turns on the red brake warning light, and the manual explains the two reasons the level drops: normal pad wear, or a leak. Do not simply top off. If the pads are worn, the level comes back up when new pads are installed. If there is a leak, adding fluid hides it. The Cruze calls for DOT 3 brake fluid from a sealed container, as marked on the reservoir cap, and GM warns that even a few drops of mineral oil such as engine oil can ruin hydraulic parts.
ABS lights also show up right after brake work. Hanging a knuckle by the sensor wire, pinching the harness, or knocking the sensor connector loose can set a speed sensor code. If the light came on after a pad or rotor job, check the wiring and connector at the wheel that was serviced first.
How to Diagnose It Step by Step
- Note which lights are on. ABS only, or ABS plus the red brake light. The second one needs attention before you drive.
- Check the brake fluid level against the MIN and MAX marks on the reservoir.
- Read the codes with a scan tool that reads ABS/EBCM codes. A basic engine code reader often cannot see ABS codes. C0035-C0050 point to a specific wheel.
- Inspect that corner: sensor connector, harness routing, and the encoder ring for metal debris per GM's bulletin.
- Clear the codes and road test. If the code returns at the same wheel after cleaning and wiring checks, the sensor or the bearing hub (with its encoder) is the next suspect. A worn hub with play can also upset the signal.
What to Replace, and What to Do at the Same Time
Many Cruze ABS lights are fixed by cleaning and a connector repair, with no parts. When the code points to a failed sensor or damaged encoder, the repair is a sensor or a bearing hub assembly for that corner. Since the front brakes come apart to reach the hub, it is a good time to check pad thickness and rotor condition. If the pads are close to the wear limit, fit new Bendix front ceramic brake pads for the 2011-2019 Cruze, and look at our brake rotors if the rotors are scored or below minimum thickness. Browse all brake pads or the full brake parts catalog for the rest of the job.
Difficulty: reading codes and checking connectors is easy. Cleaning the encoder ring is moderate, since it may mean pulling the hub. GM's own warranty labor time in the bulletin is longer for the Cruze front corner than the rear. Torque the hub, caliper and wheel fasteners to the values in the factory service manual.
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Shop Brake Parts →Frequently Asked Questions
Is it safe to drive a Cruze with the ABS light on?
If only the ABS light is on, the owner's manual says the car still has normal brakes but no antilock function. Drive gently and get it checked. If the red brake warning light is on too, the regular brakes have a problem and the car should be inspected before driving.
Why are the ABS, traction control and StabiliTrak lights all on at once?
All three systems use the same wheel speed sensor data. When the brake control module loses a reliable wheel speed signal, it turns off ABS, traction control and StabiliTrak together.
Will new brake pads turn off the ABS light?
Not by themselves. Worn pads can lower the fluid level and trigger the red brake light, but the amber ABS light points to the ABS system, usually a wheel speed signal. Find the code first.
Can a regular OBD2 scanner read Cruze ABS codes?
Many basic readers only see engine codes. You need a scan tool that can read the ABS/EBCM module to see codes like C0035 through C0050.
Do I have to replace the wheel bearing to fix the ABS light?
Often not. GM's bulletin PIC5428D says most encoder-ring debris cases are fixed by cleaning, without replacing the bearing hub or sensor. Replace the hub only if the encoder is damaged or the bearing is worn.
What brake fluid does the Chevy Cruze use?
The Cruze owner's manuals specify DOT 3 brake fluid from a sealed container, as marked on the reservoir cap.
Sources
- GM Bulletin PIC5428D via NHTSA - 2011-2013 Cruze coverage, ABS/StabiliTrak symptoms, codes C0035-C0050 by corner, encoder ring cleaning procedure and cautions
- 2013 Chevrolet Cruze Owner Manual - ABS light behavior, 13 mph reset guidance, brakes-without-ABS statement, DOT 3 fluid, fluid level causes, ABS self-test noise
- 2017 Chevrolet Cruze Owner's Manual - same ABS light guidance and DOT 3 fluid on the second-generation car, Service StabiliTrak message
- Brake and Front End: Wheel Speed Sensors, ABS and TCS Signal Use - how active magnetoresistive sensors work, low-signal and connector faults, shared data with traction and stability control
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