Which cars report code C0034?

Code C0034 is named in 3 US owner complaints. Models: 3, model years 2009–2020. Honda Insight, Mazda Mazda6, RAM 2500.

C0034 code: Right Front Wheel Speed Sensor

Q: What does code C0034 mean?

Right Front Wheel Speed Sensor. How to read C0034: 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 034 identify the specific fault.

Code C0034 is named in 3 US owner complaints. Models: 3, model years 2009–2020.

What the code means

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

How to read C0034: 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 034 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: 3
Models: 3
Model years: 2009–2020

Which models and years

Models whose owners name this code (3). Years link to the model year problems page.

Model	Years	Complaints
Honda Insight	2020	1
Mazda Mazda6	2009	1
RAM 2500	2018	1

Components named together with the code

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

Electrical system 3
Service brakes 2
Engine 1
Powertrain 1
Other 1

Complaints by model year

2009 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.

The tcs/dsc light would stay lit for 10-15 mins after I started my car and sometimes would just randomly come on while driving. The dealership did test & found "code C0034 - right front wheel speed sensor signal rate out of range & C0027, C0048 - right front wheel speed sensor circuit open, tech monitored sensor &…
Mazda Mazda6 2009 · 2015-05

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.