C0525 code meaning
Multi-axis Acceleration Sensor Module B
What C0525 means
General fault of module B, without stating whether range, calibration, signal stability or correlation is at fault. No manufacturer publishes C0525, and the location of module B is not documented. According to Bosch, one inertial unit can feed stability control as well as the airbag electronics, and an integrated version exists; the 2013 Buick Regal, for example, carries its multi-axis sensor in a module of its own at GM. FCA files a comparable internal failure as C006A-49 on Ram pickups and says that replacing the ABS or occupant restraint module is unnecessary if the code clears after a software update. Whether module B means a second IMU or a sensor in another controller therefore depends on the make.
C0525 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C0525
- ESC, airbag-related or assistance warning depending on host module
- Stability or assistance functions unavailable
Common causes of C0525
- PossibleSoftware fault, fixed by an update of the host module
- PossibleInternal electronic failure of module B
- Less likelySupply or ground fault at module B
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Multi axis accel module b
What each part of C0525 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 25 | The exact fault in that area. |
What to do next
- Note C0525 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 C0525
What does C0525 mean?
C0525 means "Multi-axis Acceleration Sensor Module B". General fault of module B, without stating whether range, calibration, signal stability or correlation is at fault. It is a generic code, so it means the same on every make.
Is it safe to drive with C0525?
Drive gently and only to a workshop. With C0525 the car can go into limp mode (reduced power) to protect itself.
Will C0525 fail an emissions test?
C0525 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 C0525 to fix?
Difficulty: hard. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will C0525 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.