Fault Description: Vauxhall Corsa Bosch 8 ABS Pump Hydraulic Unit Failure
Fault Codes: The following fault codes may be logged in the ABS system:
1. C0035 – Left Front Wheel Speed Sensor Circuit
2. C0040 – Right Front Wheel Speed Sensor Circuit
3. C0045 – Left Rear Wheel Speed Sensor Circuit
4. C0050 – Right Rear Wheel Speed Sensor Circuit
5. C0121 – Valve Relay Circuit Malfunction
6. C0131 – ABS Pump Motor Circuit Malfunction
Affected Vehicles and Production Years: The Vauxhall Corsa Bosch 8 ABS pump is commonly fitted to various Vauxhall Corsa models, including:
1. Vauxhall Corsa D (Model years: 2006-2014)
2. Vauxhall Corsa E (Model years: 2014-2019)
Description:
The Vauxhall Corsa Bosch 8 ABS pump is an integral part of the Anti-Lock Braking System (ABS), responsible for preventing wheel lock-up during sudden braking or on slippery surfaces. The ABS pump includes a hydraulic unit with valves, solenoids, and a pump motor, which work together to control brake fluid pressure to each wheel.
One common fault that can occur with the Bosch 8 ABS pump is a failure in the hydraulic unit. Internal hydraulic unit faults can lead to issues with the operation of the calipers, causing reduced or uneven braking performance.
When the ABS system detects a fault within the hydraulic unit, it may log one or more of the above-mentioned fault codes to indicate the specific issue. The fault codes “C0035,” “C0040,” “C0045,” and “C0050” pertain to wheel speed sensor circuit malfunctions, which can lead to erratic or incorrect wheel speed readings. The codes “C0121” and “C0131” are related to ABS valve relay and pump motor circuit malfunctions, respectively, indicating problems with the hydraulic unit’s components.
The lack of caliper operation due to internal hydraulic unit faults can cause issues such as reduced brake force to one or more wheels, leading to longer braking distances and potential loss of control in emergency braking situations. The ABS warning light may illuminate on the dashboard to indicate a fault with the ABS system.
Part numbers of affected ABS pumps include:
0265800422 / 0265231537 / 0265232238 / 0265800579 / 0265800443 / 0265800770 / 0265800771 / 0265800796 / 0265800872 / 0265800953