0134
Moderate0134 — Brake Pressure Sensor: Incorrect Zero Offset
Description
What the Code Means
Code 0134 flags an incorrect zero offset of the brake pressure sensor. The sensor is built into the ABS pump and reports brake system pressure to the DSC module.
When working correctly, DSC relies on this sensor's readings to calculate its interventions. If the signal offset drifts outside the allowed range, the control module gets distorted pressure data and the system's control logic is compromised.
Symptoms
Symptoms
- ABS and DSC warning lights on the instrument cluster.
- Brake pressure readings show an offset during diagnostics.
Causes and fixes
Diagnosis and Repair
- Read fault codes with a diagnostic scanner (ISTA/INPA).
- Check brake pressure live data and assess the offset in the readings.
- Based on the results, replace or rebuild the ABS pump, since the sensor is built into it.
- Bleed the brake system after working on the ABS pump.
- Clear the fault codes and check whether the error returns.
Possible secondary damage
Secondary Problems
- Incorrect DSC intervention: the system may trigger falsely or late because of distorted pressure data.
- Potential loss of control in an emergency when DSC operation is critical.