Bosch 8 ABS/EPS Pump Module Fault Repair
The Bosch 8 ABS is an evolved version of the Bosch 5.7 unit. Car makes such as Alfa Romeo, BMW, Citroën, Suzuki and VW use this ABS part. The pressure sensors are known to fail as is the pump motor.
Possible Problems
- Communications With ABS Impossible
- Pump Malfunctions
- No Brake Pressure
- Wheel Sensor Faults
Possible Problems
- Communications with the ABS isn’t possible
- Pump motors malfunction
- Brake pressure for at least one of the wheels fails
Error Code Examples (Other makes also possible)
CITROËN / PEUGEOT
- C1301 – Inconsistency Between The Brake Light Switch And The Pressure Sensor
- C1381 – Recirculation Pump Supply
- C1385 – Electrovalves Supply Voltage Fault
FIAT
- C1115 – Solenoid Supply Valve
NISSAN
- C1110 – Controller Failure
- C1111 – ABS Pump Motor
SUZUKI
- C1028 – Brake Pressure Sensor Defective
VAG (AUDI / SEAT / ŠKODA / VOLKSWAGEN)
- 01276 – ABS Hydraulic Pump (V64)
Introduction: The Bosch 8 ABS, the successor to the widely-used Bosch 5.7, is integral to various car manufacturers, including Alfa Romeo, Citroën, BMW, Suzuki, and Volkswagen. This advanced ABS unit comprises three essential components: the pump-motor, the Hydraulic Control Unit (HCU), and the Electronic Control Unit (ECU). These components work together to ensure optimal performance. When issues arise, it’s crucial to address them comprehensively, as other components within the unit can also develop faults. At AutoTronics, we exclusively accept full ABS-Units for remanufacturing, based on our extensive experience.
Common Defects and Fault Codes in Bosch 8 ABS: The Bosch 8 ABS unit is susceptible to specific defects, often leading to fault codes. The pressure sensors and hybrid connections in the HCU are prone to issues, affecting various car makes and models. Another prevalent problem is a malfunctioning pump-motor. A seized pump-motor can damage the printed circuit board (PCB), necessitating a more extensive remanufacture process. Replacement of the pump-motor and PCB connections is vital for the proper operation of the ABS-ECU.
It’s worth noting that ABS issues aren’t always rooted in the ABS unit itself. Wheel sensors, magnetic rings, or the ABS-ECU connectors can also be problematic. Therefore, it’s essential to verify the condition of these components before sending in the ABS-Unit for repair.
Common Faults in Bosch 8 ABS: The Bosch 8 ABS may exhibit various faults, including:
- Loss of communication with the ABS unit.
- Multiple wheel sensor faults.
- Pump-motor malfunction.
- Insufficient brake pressure on one or more wheels.
Conclusion: Understanding the common defects and fault codes in the Bosch 8 ABS unit is essential for effective repair and remanufacture. AutoTronics recommends addressing the entire ABS-Unit due to the potential for multiple component faults. To learn more about the operation, defects, or the remanufacture process, refer to our comprehensive Bosch 8 ABS Knowledge article.
Can be remanufactured
DACIA / RENAULT
Item no. | Error code | Description |
Various numbers | 20675 | Valve relay internal fault |
50C3 | ||
C10C3 | ||
DF017 |
NISSAN
Item no. | Error code | Description |
0 265 950 616 | C1110 | Controller failure |
0 265 950 674 | C1111 | Pump motor failure |
0 265 951 223 | ||
0 265 951 224 | ||
0 265 951 528 | ||
0 265 951 743 |
VAUXHALL
Item no. | Error code | Description |
0 265 950 402 | ||
0 265 950 460 | ||
0 265 950 475 | ||
0 265 950 820 | ||
0 265 951 015 | ||
0 265 951 440 | ||
0 265 951 597 | ||
0 265 951 752 |
One or more wheels are permanently locked or there is no brake pressure at one of the wheels. This is an issue in the HCU.
VAG (AUDI / SEAT / ŠKODA / VOLKSWAGEN)
Item no. | Error code | Description |
0 265 950 429 | 01418 | Solenoid valve 1 N225 failure |
0 265 950 430 | 01421 | Solenoid valve 2 N228 failure |
0 265 950 506 | 01435 | |
P059B | Pressure sensor G201 Failure |
Remanufacture may be possible
In principle, we can remanufacture all types of the Bosch 8 Premium system, but the problems associated with these types differ significantly from the normal Bosch 8 ABS/ESP system. So please always contact our Customer Service department first.
Cannot be remanufactured
BMW
Item no. | Error code | Description |
Various numbers | 5D95 | Valve relay |
Tip: check the power supply, ground and fuses.
CITROËN / PEUGEOT
Item no. | Error code | Description |
0 265 950 330 | C1301 | Error codes indicating some kind of connection between |
0 265 950 407 | 4040 | the brake pedal switch and the pressure sensor. |
0 265 950 560 | 5301 | |
0 265 951 178 | ||
0 265 951 245 | ||
0 265 951 325 | ||
0 265 951 326 | ||
0 265 951 829 |
Tip: This is often caused by an incorrectly adjusted or defective brake light switch.
0 265 950 636 | C1381 | Return pump |
0 265 950 963 | 5381 | |
0 265 951 134 | ||
0 265 951 178 | ||
0 265 951 186 | ||
0 265 951 218 | ||
0 265 951 325 |
Tip: check the power supply, ground and fuses.
0 265 950 370 | C1385 | Supply relay solenoid valves, permanent failure |
0 265 950 464 | 5385 | |
0 265 950 560 | ||
0 265 950 962 | ||
0 265 951 104 | ||
0 265 951 134 | ||
0 265 951 178 | ||
0 265 951 326 | ||
0 265 951 422 | ||
0 265 951 434 | ||
0 265 951 475 | ||
0 265 952 294 |
Tip: check the power supply, ground and fuses. The external relay also often causes problems.
FIAT
Item no. | Error code | Description |
Various numbers | C1115 | Solenoid valve supply fault |
Tip: check the power supply, ground and fuses.
0 265 950 461 | Various pressure sensor problems | |
0 265 950 815 | C1121 | Valve relay |
Tip: check the power supply, ground and fuses.
MERCEDES-BENZ
Item no. | Error code | Description |
0 265 950 884 | C03C0 | Pump motor voltage |
0 265 951 520 | 43C0 | Pump motor voltage |
0 265 951 521 | ||
0 265 951 522 |
Tip: often caused by the fuse
0 265 951 106 | 4260 | Valve relay |
Tip: check the power supply, ground and fuses.
VAUXHALL
Item no. | Error code | Description |
0 265 950 820 | ||
0 265 951 597 | ||
0 265 951 793 | ||
0 265 951 794 | ||
0 265 952 104 |
Wheel sensor errors such as C0040 due to coolant leakage cannot be repaired.
SUZUKI
Item no. | Error code | Description |
0 265 950 462 | C1028 | Pressure sensor fault |
0 265 951 309 | ||
0 265 951 311 |
VAG (AUDI / SEAT / ŠKODA / VOLKSWAGEN)
Item no. | Error code | Description |
Various numbers | 01276 | ABS hydraulic pump |
Tip: check the bolt-down fuses on the battery.
0 265 950 353 | C03C0 | Pump motor voltage |
0 265 951 520 | 43C0 | Pump motor voltage |
Tip: often caused by the fuse
0 265 950 689 | 00301 | Return pump V39 |
1201 | Pump motor voltage |
Tip: check the power supply, ground and fuses.
0 265 955 000 | 1200 | |
0 265 955 025 | 4B0 | Solenoid valve supply failure |
0 265 955 347 |
Tip: check the power supply, ground and fuses.
If you are having issues with your Bosch 8 ABS unit, then we can help with a quick and cost-efficient repair. Just book online here, or give us a call on 0116 276 7054, email us at [email protected] or if you are local to us come into our shop in Leicester and talk to one of our experienced engineers.
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