C0139

Base Brake System Pressure Circuit/Sensor High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

ABS/ESP indicator is on
Disabling the stabilization system
Hard or uneven brake application
Errors in related systems

Causes

Brake pressure sensor malfunction
Short circuit in the sensor circuit
Broken or damaged wiring harness
Problems with the ABS/ESP control unit
Contact corrosion

How to Fix

Check the integrity of the wiring harness to the sensor
Measure the resistance and voltage in the sensor circuit
Check the sensor readings with a scanner
Replace pressure sensor if necessary
Clean contacts and connectors
Flash the control unit if you suspect a software error

Related codes

C0121 C0123 C0135