C0521

Multi-axis Acceleration Sensor Module B Range/Performance

Severity

⚠️ Medium

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–222 (est.)

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

C0520 C0522 C0035 C0036