C0088
Brake Fluid Level Sensor Circuit
1999-2000 BMW 323i E46 2.5L I6 🇩🇪
Moderate SeverityChassis
Description
Malfunction in the brake fluid level sensor circuit in the master cylinder reservoir.
Symptoms
- Brake warning light on
- Low brake fluid warning
- ABS may be disabled
- Stability control may be disabled
Common Causes
- Low brake fluid level
- Faulty float sensor in reservoir
- Wiring to sensor damaged
- Sensor connector corroded
Diagnostic Steps
- Check brake fluid level first
- Inspect sensor connector
- Test sensor circuit continuity
- Add brake fluid and verify warning clears
- Check for brake fluid leaks
Repair Notes
Fill brake fluid to proper level. If fluid is low, inspect for leaks at calipers, hoses, and wheel cylinders. Replace sensor if faulty.
Related Codes
Other Chassis Codes
- C0021LF Wheel Speed Sensor Range/Performance
- C0022RF Wheel Speed Sensor Range/Performance
- C0023LR Wheel Speed Sensor Range/Performance
- C0024RR Wheel Speed Sensor Range/Performance
- C0025LF Wheel Speed Sensor Circuit Intermittent
- C0026RF Wheel Speed Sensor Circuit Intermittent
- C0027LR Wheel Speed Sensor Circuit Intermittent
- C0028RR Wheel Speed Sensor Circuit Intermittent
- C0035Left Front Wheel Speed Sensor Circuit
- C0036Left Front Wheel Speed Signal Erratic
C0088 on Other Vehicles
Common Questions
What does code C0088 mean on a 1999-2000 BMW 323i E46?
C0088 stands for "Brake Fluid Level Sensor Circuit". Malfunction in the brake fluid level sensor circuit in the master cylinder reservoir.
What are the symptoms of C0088 on a BMW 323i E46?
Common symptoms of C0088 include: Brake warning light on, Low brake fluid warning, ABS may be disabled, Stability control may be disabled.
What causes C0088 on a 1999-2000 BMW 323i E46?
Common causes of C0088 include: Low brake fluid level, Faulty float sensor in reservoir, Wiring to sensor damaged, Sensor connector corroded.