Which cars report code C0031?

Code C0031 is named in 4 US owner complaints. Models: 4, model years 2016–2020. Ford Fusion, Honda Insight, Lincoln MKZ, RAM 2500.

C0031 code: Left Front Wheel Speed Sensor

Q: What does code C0031 mean?

Left Front Wheel Speed Sensor. How to read C0031: the letter C means chassis (brakes, ABS, steering, suspension); the second digit 0 marks a generic SAE code shared by all makes; the last three characters 031 identify the specific fault.

Code C0031 is named in 4 US owner complaints. Models: 4, model years 2016–2020.

What the code means

Left Front Wheel Speed Sensor. Generic meaning per SAE J2012 (the same for all makes).

How to read C0031: the letter C means chassis (brakes, ABS, steering, suspension); the second digit 0 marks a generic SAE code shared by all makes; the last three characters 031 identify the specific fault.

ABS/ESC codes: wheel speed sensors, the ABS hydraulic unit and pump, brake booster, pressure and yaw sensors. A hit to a wheel or suspension often damages the wheel speed sensor or its wiring, so on a damaged car this code is a reason to inspect the hub, knuckle and control arms, not just swap the sensor.

Key figures

Complaints with this code: 4
Models: 4
Model years: 2016–2020

Which models and years

Models whose owners name this code (4). Years link to the model year problems page.

Model	Years	Complaints
Ford Fusion	2016	1
Honda Insight	2020	1
Lincoln MKZ	2017	1
RAM 2500	2018	1

Components named together with the code

Component as the owner filed it (one complaint can list several).

Electrical system 2
Powertrain 2
Vehicle speed control 2
Air bags 1
Electronic stability control 1
Engine 1
Service brakes 1
Steering 1

Complaints by model year

2016 1
2017 1
2018 1
2020 1

What to do if an auction car has this code

Inspect the wheel and suspension on the impact side: the wheel speed sensor is often damaged together with the hub or knuckle.
Check whether the ABS and ESC lights stay on after start-up.
After replacing sensors or the hydraulic unit, bleeding and scan tool adaptation may be required.

What owners report

Excerpts of owner complaints in the original wording. Owner statements not verified by the regulator; personal data removed.

ABS, Traction controle and 4 wheel drive system shut down. the truck is sending code- C0031-1D directly related to C4B recall. The dealerships have no fix and offered no support or guidance but did agree that the truck is unsafe to drive as is.
RAM 2500 2018 · 2026-08
The ABS/stability control system had been damaged during the service visit. Diagnostic codes C0031:07 and C0031:15 (left front wheel speed sensor circuit fault) were confirmed in writing by the dealership service manager on 06/09/2026. The dealership denied responsibility.
Lincoln MKZ 2017 · 2026-06
I have contacted with a ford dealer to diagnose the problem. Error codes they got from the car were C0031 and U0401. The first one is related to a short wire in the abs wheel speed sensor at the driver side front wheel and this part was replaced at the dealer.
Ford Fusion 2016 · 2018-02

Related codes

Sources: public official US data (owner complaints) and the SAE J2012 standard. Complaints are owner statements not verified by the regulator. A code from a complaint does not replace a scan tool diagnosis. Data updated 2026-11-10.