C0556 code meaning
Right Front Wheel Speed Sensor A Incorrect Component Installed
Chassis system Generic code C05xx codes Check engine light
What C0556 means
Mirror of C0555 for the right front wheel: the sensor delivers pulses, yet the ABS module rejects it as the wrong component. Mitsubishi lists its code C1063-4A on the 2023 Outlander PHEV as C0556, with the same rule (fitted at the wrong position, at most 3 s, two trips to MIL plus ASC and ABS lamps). Worth noting from that procedure: a code that is only stored, not active, may simply mean the car was not driven after the last repair, and the ABS unit should not be replaced for it; the check needs about 2 minutes at 50 km/h or more. HELLA notes that powered (active) and self-generating (passive) sensors are often hard to tell apart by eye and that carmakers have mostly fitted active ones since 1998, which makes a mixed-up spare part a realistic cause. Circuit faults on this wheel show up as C0506 or C0034 instead.
C0556 at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairAfter a drive cycle
Symptoms of C0556
- ABS and stability warning lamps on, MIL on some models
- No ABS or ESC intervention on slippery roads
Common causes of C0556
- Most likelyReplacement sensor of the wrong type (passive instead of active, other side)
- PossibleStored code left over because no test drive followed the repair
- Less likelyABS control unit fault
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Wss rf
What each part of C0556 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 56 | The exact fault in that area. |
What to do next
- Note C0556 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 C0556
What does C0556 mean?
C0556 means "Right Front Wheel Speed Sensor A Incorrect Component Installed". Mirror of C0555 for the right front wheel: the sensor delivers pulses, yet the ABS module rejects it as the wrong component. It is a generic code, so it means the same on every make.
Is it safe to drive with C0556?
Drive gently and only to a workshop. With C0556 the car can go into limp mode (reduced power) to protect itself.
Will C0556 fail an emissions test?
C0556 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 C0556 to fix?
Difficulty: easy. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will C0556 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.