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AutoCodes - Generic - B1938

B1938 Code - Air Bag Passenger Circuit Short To Ground Fault

- Code Popularity: 4,146 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 B1938 Possible Causes

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

|How do I Fix the Code B1938?

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 B1938?

Labor: 1.0

The cost of diagnosing the B1938 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 B1938 Possible Symptoms?

  • Air Bag Warning Light ON

|Code B1938 Description

The Restraints Control Module (RCM) checks all of the Passenger Air Bag Circuits for faults. If the RCM detects a short to ground on any of the Passenger Air Bag Module Squib 1 Circuits, it will store Diagnostic Trouble Code (DTC) B1938 in memory and illuminate the air bag indicator.

OBDII Code B1938 - Air Bag Passenger Circuit Short To Ground Fault - AutoCodes.com
B1938 Code - Air Bag Passenger Circuit Short To Ground Fault

|Need More Information on the B1938 Code?

Need more information on how to fix the B1938 code? Get Access to Factory Service Manuals

|Information for Specific Makes

  • B1938 Ford Air Bag Passenger Circuit Short To Ground Fault
  • B1938 Lincoln Air Bag Passenger Circuit Short To Ground Fault
  • B1938 Mercury Air Bag Passenger Circuit Short To Ground Fault

|Need Help with the B1938 Code?

Get the B1938 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 B1938 comments

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