B1939
Air Bag Passenger Pressure Switch Circuit Short To Ground Fault
B1939 is an OBD-II diagnostic trouble code meaning: Air Bag Passenger Pressure Switch Circuit Short To Ground Fault. Common causes: damage to the pressure sensor wiring harness, short circuit to ground in the sensor circuit. Estimated repair cost: $56–167.
Symptoms
- Airbag light (SRS) is on
- Security error message on dashboard
- The passenger airbag may not deploy in a crash.
Causes
- Damage to the pressure sensor wiring harness
- Short circuit to ground in the sensor circuit
- Corrosion of sensor contacts or connectors
- Pressure sensor malfunction
How to Fix
- Visually inspect the sensor wiring harness for damage.
- Check the continuity of the sensor circuit using a multimeter
- Clean connector contacts from corrosion
- Replace pressure sensor if necessary
- Reset the error code and check the system
Related codes
FAQ
What does the B1939 code mean?
B1939 is an OBD-II diagnostic trouble code that indicates: Air Bag Passenger Pressure Switch Circuit Short To Ground Fault
What causes a B1939 error code?
The most common causes of B1939 include: Damage to the pressure sensor wiring harness; Short circuit to ground in the sensor circuit; Corrosion of sensor contacts or connectors; Pressure sensor malfunction.
How do I fix a B1939 diagnostic trouble code?
To fix B1939: Visually inspect the sensor wiring harness for damage.. Check the continuity of the sensor circuit using a multimeter. Clean connector contacts from corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1939?
Do not drive — repair immediately
How much does it cost to fix B1939?
The estimated repair cost for B1939 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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