C0036 code meaning
Left Rear Tone Wheel
What C0036 means
Covers the left rear tone wheel (reluctor or encoder ring) read by the left rear wheel speed sensor, the rear-axle counterpart of C0030 and C0033. It is a signal-plausibility code set when the module sees an erratic, noisy or intermittent rear speed signal consistent with a damaged, contaminated or loose tone ring rather than a sensor circuit failure. Ford documents C0036 with C0037 and C003A on 2021 Bronco and Ranger vehicles with an illuminated ABS warning. A fault disables ABS, traction and stability control and lights the ABS warning lamp while base braking remains; on vehicles that use the rear sensors for electronic brake-force distribution that function is affected too.
C0036 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.8 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C0036
- ABS warning lamp on
- ABS and stability control disabled
- Grinding noise from wheel hub
Common causes of C0036
- Most likelyDamaged or contaminated tone ring
- PossibleLoose or displaced hub bearing
- Less likelyExcessive sensor-to-ring air gap
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Lr tone wheel
What each part of C0036 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 36 | The exact fault in that area. |
What to do next
- Note C0036 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 C0036
What does C0036 mean?
C0036 means "Left Rear Tone Wheel". Covers the left rear tone wheel (reluctor or encoder ring) read by the left rear wheel speed sensor, the rear-axle counterpart of C0030 and C0033. It is a generic code, so it means the same on every make.
Is it safe to drive with C0036?
Drive gently and only to a workshop. With C0036 the car can go into limp mode (reduced power) to protect itself.
Will C0036 fail an emissions test?
C0036 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 C0036 to fix?
Difficulty: medium. A typical repair takes 0.8 to 2.5 hours of work. This is a job for a workshop.
Will C0036 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.