VOLVO
BCM-C102A62 - Brake Secondary Circuit Pressure Mismatch Between Wheels. Algorithm Based Failures. Signal compare failure
System
Brake Control Module (BCM)
Volvo models this fault code applies to
Applies to the following models:
1 modelV60 (2011–)
Show models by year and engine (2)
What does this fault code mean?
On the V60, the brake control module (BCM) has compared the readings of the two secondary circuit pressure sensors and found that they differ. The cause may be a leak, air or damage in the hydraulic system, or a damaged sensor.
Possible causes
- Leak in the hydraulic system
- Air in the hydraulic system
- Damage in the hydraulic system
- Damaged pressure sensor
What you can do
- 1Read and note the code, clear it and road test the car to see whether it returns
- 2Look for leaks and make sure there are no air bubbles in the brake fluid
- 3Have a workshop look for damage in the hydraulic system and replace the pressure sensor if it is damaged
- 4If the fault returns, the brake control module needs replacing by a workshop, and the acceleration sensor and internal sensors must then be calibrated
- 5The braking system is safety critical: do not work on the hydraulic system or pressure sensors yourself; leave this to a workshop
Symptoms you may notice4
- Hill descent assist does not work
- Hill start assist does not work
- Anti-spin function does not work
- ABS does not work or activates suddenly
General guidance for car owners. Diagnosis on the car can point to a different cause.