BCM-0139

BCM-0139: Pressure Build Up Valve, Power Brake Booster. Signal Outside Its Permitted Range
Condition





Note! This Diagnostic Trouble Code (DTC) applies only to brake systems with Dynamic Stability And Traction Control (DSTC).

During stability control the Brake Control Module (BCM) transmits a signal to the pressure build-up valve. The valve opens and releases atmospheric pressure into the brake power booster. This increases the brake pressure in the brake system automatically. The function is used for traction control and in active brake assistance.
Diagnostic Trouble Code (DTC) BCM-0139 is stored if the control module registers an implausible signal from the pressure build-up valve.

Substitute value
- Traction control is blocked
- Stability control is blocked
- Active yaw control is blocked
- Brake assistance is blocked.

Hint: For information about abbreviations, Refer to Description and Operation.

Possible source
- Contact resistance or oxidation in the terminals or connections
- Short-circuit to ground or supply voltage in the wiring
- Incorrectly installed sensor
- Defective pressure build-up valve
- Internal fault in the control module.

Fault symptom[s]
- General warning lamp lit
- The anti-spin warning lamp is lit (up to and including 2002 model year)
- Anti-spin does not function
- The stability control system does not function
- The traction control system does not function.