Brake Pressure Switch Input Circuit Failure
Table of contents
C1939 MERCURY Possible Causes
- Faulty Brake Pressure Switch (BPS)
- Brake Pressure Switch (BPS) harness is open or shorted
- Brake Pressure Switch (BPS) circuit poor electrical connection
How do I fix code C1939 MERCURY?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the C1939 MERCURY code
The cost of diagnosing the C1939 MERCURY code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Anti-Lock Brake System (ABS) Warning Light ON
- Engine Light ON (or Service Engine Soon Warning Light)
C1939 MERCURY Description
The Anti-Lock Brake System (ABS) Module monitors the Brake Pressure Switch (BPS). The ABS Module sets the OBDII code when the Brake Pressure Switch is not to factory specifications.