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AutoCodes - Generic - B1939

B1939 Code - Air Bag Passenger Pressure Switch Circuit Short To Ground Fault

- Code Popularity: 3,619 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
By AutoCodes.com - Updated Jul 29, 2019
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|Code B1939 Possible Causes

  • Faulty Air Bag Passenger Pressure Switch
  • Air Bag Passenger Pressure Switch harness is open or shorted
  • Air Bag Passenger Pressure Switch circuit poor electrical connection
  • Faulty Restraint Control Module (RCM)

|How do I Fix the Code B1939?

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.

Does your Car have Safety Recalls? → Check here

|What is the Cost to Diagnose the Code B1939?

Labor: 1.0

The cost of diagnosing the B1939 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.

|What are Code B1939 Possible Symptoms?

  • Air Bag Warning Light ON

|Code B1939 Description

The Restraints Control Module (RCM) monitors the Air Bag Passenger Pressure Switch. The RCM sets the OBDII code when the Air Bag Passenger Pressure Switch is not to factory specifications.

OBDII Code B1939 - Air Bag Passenger Pressure Switch Circuit Short To Ground Fault - AutoCodes.com
B1939 Code - Air Bag Passenger Pressure Switch Circuit Short To Ground Fault

|Need More Information on the B1939 Code?

Need more information on how to fix the B1939 code? Get Access to Factory Service Manuals

|Information for Specific Makes

  • B1939 Ford Air Bag Passenger Pressure Switch Circuit Short To Ground Fault
  • B1939 Lincoln Air Bag Passenger Pressure Switch Circuit Short To Ground Fault
  • B1939 Mercury Air Bag Passenger Pressure Switch Circuit Short To Ground Fault

|Need Help with the B1939 Code?

Get the B1939 code diagnosed by a professional: Find a repair shop in your area

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

|Code B1939 comments

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