C0051 code meaning
Steering Wheel Position Sensor
What C0051 means
Covers the steering wheel position (steering angle) sensor and its circuit. The sensor reports absolute steering-wheel angle and rate to the ESC module, which combines it with yaw rate, lateral acceleration and wheel speeds to decide when the car is understeering or oversteering. The module sets this code for an out-of-range signal, an open or short, or a neutral/centre position that is not learned or is implausible. Honda documents DTC C0051-54, set when the steering-angle centre position has not finished its learn routine, which can occur after a battery disconnect and usually self-clears after a short straight drive; Mazda logs C0051:62 when the learned steering-angle value differs too far from the initial value. A fault disables stability control and sets the ABS/ESC warning lamp while base braking remains.
C0051 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairAfter a drive cycle
Symptoms of C0051
- Stability control disabled
- ABS/ESC warning lamp on
- Sets after battery disconnect
Common causes of C0051
- Most likelyNeutral position not learned after service
- PossibleSteering angle sensor failed
- Less likelyHarness or connector fault
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Steering angle sensor
What each part of C0051 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 51 | The exact fault in that area. |
What to do next
- Note C0051 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 C0051
What does C0051 mean?
C0051 means "Steering Wheel Position Sensor". Covers the steering wheel position (steering angle) sensor and its circuit. It is a generic code, so it means the same on every make.
Is it safe to drive with C0051?
Drive gently and only to a workshop. With C0051 the car can go into limp mode (reduced power) to protect itself.
Will C0051 fail an emissions test?
C0051 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 C0051 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will C0051 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.