C0501 code meaning
Left Front Wheel Speed Sensor A Range/Performance
Chassis system Generic code C05xx codes Check engine light
What C0501 means
C0501 means the left front speed signal is present but does not fit the situation. GM shows how differently this is judged: its 2016 hybrid tables flag the code when that wheel reads 0 mph while the other three exceed 7.45 mph at a vehicle speed above 11.8 mph (Type A), whereas the 2023 tables test the air gap and set it when magnetic flux stays below 2.2 mT for at least five wheel turns, as Type B with two trips. Mitsubishi derives C1061-92, its C0501, from a speed gap to the other wheels between 10 and 60 km/h and names wrong tire sizes and the sensor rotor. Stellantis reprogrammed engine controllers of the 2017 Cherokee 3.2 because C0501 was being stored falsely there, adding that on that model it does not light the MIL.
C0501 at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2.5 hours
- Clears after repairAfter a drive cycle
Symptoms of C0501
- ABS and stability warning lamps on after driving, not at key-on
- Unexpected ABS or traction control intervention at low speed
- Code stored in the engine controller without MIL (Stellantis)
Common causes of C0501
- Most likelySensor not fully seated or air gap to the tone ring too large
- PossibleTire on the left front differs in size from the specified one
- PossibleTone ring or magnetic encoder damaged or dirty
- Less likelyControl module software sets the code falsely (Stellantis reflash)
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Wss lfTone ring lfTires
What each part of C0501 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 01 | The exact fault in that area. |
What to do next
- Note C0501 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about C0501
What does C0501 mean?
C0501 means "Left Front Wheel Speed Sensor A Range/Performance". C0501 means the left front speed signal is present but does not fit the situation. It is a generic code, so it means the same on every make.
Is it safe to drive with C0501?
Drive gently and only to a workshop. With C0501 the car can go into limp mode (reduced power) to protect itself.
Will C0501 fail an emissions test?
C0501 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is C0501 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will C0501 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.