C0512 code meaning
Right Rear Wheel Speed Sensor A Circuit/Open
Chassis system Generic code C05xx codes Check engine light
What C0512 means
C0512 is the open-circuit code for the right rear wheel. GM's 2016 hybrid tables run the check only after the sensor self-test has finished and system voltage is above 6.9 V; then 0.12 s with less than 3.8 mA flowing in the signal wire is enough for a Type A entry. The XT4 section of GM's 2019 tables words the same test as a ground short or interruption and monitors the supply line separately. Mitsubishi assigns C1067-13 to C0512 with a delay of at most one second and lists harness, sensor and the brake unit's power feed as suspects. Because an active sensor modulates a two-wire current, as Bosch describes it, a reading near zero cannot be a slow wheel; it points to a broken lead, an unplugged connector or a dead sensor.
C0512 at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C0512
- ABS and stability lamps on at key-on, sometimes the MIL
- Right rear wheel speed reads zero in live data
- ABS and traction control unavailable
Common causes of C0512
- Most likelyBroken lead or unplugged connector at the right rear
- PossibleRight rear sensor open internally
- Less likelyFuse or power feed of the brake module (Mitsubishi lists it)
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Wss rrSensor wiring
What each part of C0512 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 12 | The exact fault in that area. |
What to do next
- Note C0512 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 C0512
What does C0512 mean?
C0512 means "Right Rear Wheel Speed Sensor A Circuit/Open". C0512 is the open-circuit code for the right rear wheel. It is a generic code, so it means the same on every make.
Is it safe to drive with C0512?
Drive gently and only to a workshop. With C0512 the car can go into limp mode (reduced power) to protect itself.
Will C0512 fail an emissions test?
C0512 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 C0512 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will C0512 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.