C0010 on 2018-2022 Buick Envision: ABS Light Causes and Fixes

What's Unique About the 2018-2022 Buick ENVISION

What's unique to the Envision and other GM platforms of this era is the high likelihood of this code being a 'ghost' code. GM identified that maneuvers like a quick three-point turn, where the driver shifts from Drive to Reverse (or vice-versa) before the vehicle comes to a complete stop, can confuse the brake control module. Specifically, TSB 20-NA-118 states the code can be falsely set if the driver is coasting in one direction (above 10 KPH / 6 MPH), moves the shift selector to the opposite direction for more than one second, and does not press the accelerator. The module sees wheel speed when it expects none during a gear change and incorrectly logs a fault with the wheel speed sensor circuit. This is so common that GM issued specific Technical Service Bulletins (TSBs) to address it.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Generation note: The 2018-2022 range covers two generations: the first generation (2016-2020) and the second generation (2021-present). The TSBs specifically mentioning the false code issue cover model years 2018-2022 for the Envision. The issue is also documented on many other GM vehicles, including the Chevy Equinox and GMC Terrain, for model years up to 2024.

Symptoms You May Notice

• ABS warning light is on
• Traction Control System (TCS) or StabiliTrak warning light is on
• Possible notification from the OnStar system about a stability system issue
• Service 'Brake Assist' message may appear on the driver information center

Most Likely Causes

1. Driver-Induced False Code 🔴 High Probability The EBCM logic is sensitive to wheel movement during gear shifts, a characteristic documented by GM in service bulletins PIT5696 and 20-NA-118. The diagnostic relies on the gear selector's position, not the actual transmission gear, making it possible to trigger the fault by shifting while coasting.
   How to confirm: Check if the code is C0010 with a 5A symptom byte (C0010 5A) and if it is the only code stored. If so, clear the code and see if it returns under normal driving. If it only returns after a quick direction-change maneuver (like a 3-point turn), this is the cause.
   Typical fix: Clear the diagnostic trouble code. Advise the driver to always bring the vehicle to a complete stop before shifting between forward and reverse gears. GM explicitly states "DO NOT re-flash the EBCM software. This will not correct the issue." No parts are required for this repair.
   Est. part cost: $0
2. Faulty Left Front Wheel Speed Sensor 🟡 Medium Probability Wheel speed sensors are exposed to harsh conditions (water, dirt, vibration, road salt) and their electrical connections can fail over time.
   How to confirm: If the code returns without the specific shifting maneuver, use a scan tool to monitor live data from the left front wheel speed sensor while driving. If the signal is erratic, drops out, or doesn't match the other wheels, the sensor is likely bad. Resistance and voltage checks can also be performed.
   Typical fix: Replace the left front wheel speed sensor/hub bearing assembly. The sensor is often integrated into the wheel hub on the Envision.
   Est. part cost: $100-$250
3. Wiring Harness or Connector Issue ⚪ Low Probability
   How to confirm: Visually inspect the wiring running to the left front wheel speed sensor for any signs of damage, chafing, or corrosion at the connector. Perform a continuity and resistance test on the wiring between the sensor and the EBCM.
   Typical fix: Repair the damaged section of wire or clean/replace the corroded connector.
   Est. part cost: $10-$50

Rare But Worth Checking

• Damaged Tone Ring: The tone ring (or reluctor ring), which the sensor reads, can be damaged by debris or during other repairs (like axle work). A visual inspection is necessary if a new sensor doesn't fix the issue.
• Faulty Electronic Brake Control Module (EBCM): This is rare and should only be considered after all other possibilities (sensor, wiring, tone ring) have been exhaustively ruled out.

Diagnosis Steps

1. Use an advanced scan tool to confirm the code is C0010 and check for the '5A' symptom byte.
2. Check if any other DTCs are present. If other codes exist, diagnose them first as per GM guidance.
3. If C0010 5A is the only code, clear it.
4. Road test the vehicle, making sure to come to a complete stop before shifting between Drive and Reverse. If the code does not return, the issue was driver-induced and the repair is complete after advising the driver.
5. If the code returns during normal driving, use the scan tool to monitor the live data from all four wheel speed sensors. Compare the reading from the left front sensor to the others. Look for dropouts or erratic behavior.
6. If the signal is faulty, inspect the left front wheel speed sensor wiring and connector for visible damage, corrosion, or looseness.
7. If wiring is okay, the next step is to replace the left front wheel speed sensor. On the Envision, this is typically integrated into the wheel hub bearing assembly and is replaced as one unit.
8. If the problem persists, inspect the tone ring on the axle for damage or debris.
9. As a final step, if all other components are verified to be good, the EBCM may be at fault.

Parts You'll Likely Need

• Front Wheel Hub Bearing Assembly (OEM #13526966 (for 2018-2020 models), 13544843 (for 2021-2022 models)) — If the code is not a false flag, the sensor itself is the most common hardware failure. On the Buick Envision, the sensor is integrated into the wheel hub and replaced as a single unit.
  Trusted brands: ACDelco (OEM), Timken, MOOG, SKF, Duralast
  OEM price range: $170-$300
  Aftermarket price range: $100-$200

Technical Service Bulletins (TSBs) & Recalls

• PIT5696H: The latest version of the Preliminary Information bulletin, updated as recently as late 2024, which covers Envision models from 2018-2022. It confirms the cause is often a '3 point turn kind of maneuver' and the fix is to clear the code and advise the driver.
• 20-NA-118: A technical bulletin that provides a more detailed explanation of the cause, stating the driver must be coasting above 10 KPH, shift to the opposite direction for over a second without accelerating to set the code. It explicitly says not to re-flash the EBCM and provides a specific labor operation code for the warranty fix.
• PIT5696D/C/B/A: Earlier versions of the same bulletin that identify the cause as shifting while the vehicle is moving, affecting 2018-2020 Envision models and other GM vehicles. These show the history of GM tracking this issue.

Platform-Specific Known Issues

• Owner Experience with False Code: A user on buickforums.com with a 2019 Envision reported the ABS and Stabilitrak lights coming on. The dealer found code C0010 5A, referenced the TSB regarding shifting while moving, cleared the code, and the issue was resolved. This is a real-world example of the 'driver-induced' cause.

Mechanic-Grade Diagnostic Values

• Active Wheel Speed Sensor Power Pulse — expected: A brief 12V pulse from the EBCM upon key-on.. Failure: No voltage pulse indicates a problem with the EBCM or the wiring between the module and the sensor connector.
• Active Wheel Speed Sensor Signal — expected: A DC square wave signal that changes in frequency with wheel speed.. Failure: A missing, erratic, or non-square wave signal when viewed on an oscilloscope or graphing scan tool indicates a faulty sensor.

Hidden / Shadow Codes Worth Checking

• C0010 5A: This specific symptom byte indicates the code was set due to 'Implausible Data' from the sensor. For this vehicle, GM has identified this is almost always triggered by a specific driving maneuver (shifting while coasting) rather than a true part failure. (see via An advanced scan tool capable of reading manufacturer-specific codes and symptom bytes, such as the GM GDS2/Tech2 or equivalent professional-grade scanner.)

Scan Tool Commands That Help

• GM GDS2 or equivalent: Live Data Monitoring for all wheel speed sensors — This is the primary diagnostic step after checking for the 5A symptom byte. By graphing all four wheel speed sensors on one screen and driving the vehicle, a technician can instantly spot if the left front sensor's reading drops out, is erratic, or does not match the other three sensors during straight-line driving, confirming a hardware or wiring issue.
• GM GDS2 or equivalent: Clear EBCM DTCs — This is the specified repair for a C0010 5A code when it is the only code stored. After clearing, a road test should be performed to confirm the code does not return under normal driving conditions.

Wiring & Ground Locations

• Electronic Brake Control Module (EBCM) — In the engine bay, typically located on or near the brake master cylinder and booster. It is identifiable as a metal block (the hydraulic modulator) with multiple brake lines running into it, and a black plastic control module attached.. This module is the computer that receives the signal from the left front wheel speed sensor. All wiring for the sensor ultimately terminates at this module, making its connector a key testing point for diagnosing a persistent C0010 code.
• Wheel Speed Sensor Harness Connector — The sensor plugs into the vehicle's main harness inside the engine bay, near the strut tower. The harness is routed from the wheel hub up through the wheel well.. This connector is a common point of failure due to exposure and vibration. It is the first place to test for power from the EBCM and signal from the sensor.

OEM Part Supersession History

• 13500572, 13502829, 13507016, 13580686, 13583479, 13585466, 13590795 → 13526966 — Standard part consolidation and revision over multiple model years and platforms.
  Heads up: Part 13526966 is specified for 2018-2020 Envision models. It was later superseded by 13546938.
• 13508376, 13535012 → 13544843 — Part consolidation for the updated platform.
  Heads up: Part 13544843 is specified for the second-generation Envision (2021-2022) and is not interchangeable with the first-generation part.

Model Year Variations Within This Range

• 2018-2020 vs 2021-2022: The front wheel hub bearing assembly, which contains the wheel speed sensor, is different between the first generation (ending in 2020) and the second generation (starting in 2021). The part number for 2018-2020 models is 13526966 (or its successors), while the part for 2021-2022 models is 13544843.