C0521
Multi-axis Acceleration Sensor Module B Range/Performance
C0521 is an OBD-II diagnostic trouble code meaning: Multi-axis Acceleration Sensor Module B Range/Performance. Common causes: multi-axis acceleration sensor module b malfunction, open or short circuit in wiring harness. Estimated repair cost: $56–222.
Symptoms
- Check Engine Light Is On
- Disabling the stabilization system (ESP)
- Incorrect operation of the passive safety system
- Problems with the anti-lock braking system (ABS)
Causes
- Multi-axis acceleration sensor module B malfunction
- Open or short circuit in wiring harness
- Corrosion or oxidation of contacts
- Sensor power problems
- ECU software error
How to Fix
- Check the integrity of the wiring harness and sensor contacts
- Check the sensor supply voltage
- Check resistance and output signals of the sensor
- Replace the sensor if it is faulty
- Update ECU firmware if required
Related codes
Error C0521 by Vehicle Brand
FAQ
What does the C0521 code mean?
C0521 is an OBD-II diagnostic trouble code that indicates: Multi-axis Acceleration Sensor Module B Range/Performance
What causes a C0521 error code?
The most common causes of C0521 include: Multi-axis acceleration sensor module B malfunction; Open or short circuit in wiring harness; Corrosion or oxidation of contacts; Sensor power problems.
How do I fix a C0521 diagnostic trouble code?
To fix C0521: Check the integrity of the wiring harness and sensor contacts. Check the sensor supply voltage. Check resistance and output signals of the sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0521?
Do not drive — repair immediately
How much does it cost to fix C0521?
The estimated repair cost for C0521 is $56–222. Actual cost depends on your vehicle, location, and labor rates.
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