Skip the auto shop - Our mechanics make house calls

B1941 OBD-II Trouble Code: Airbag Crash Sensor #1 Feed/Return Circuit Open

diagnostic check engine light

B1941 code definition

A B1941 code means that the vehicle’s onboard diagnostic system has detected a discrepancy in the voltages to two terminals in the airbag circuit, and has registered a trouble code.

### What the B1941 code means Air bag systems are designed to perform self-diagnostics. Voltage at terminal #17 of the diagnostic monitor connector is supposed to stay at 9-11 volts. Circuit #617 is connected to Circuit #624, at the right front impact sensor. If voltage at terminal #2 drops below the voltage at terminal #17 , a B1941 code will be set.

What causes the B1941 code?

  • Open circuit at terminal #617 or #624
  • Open circuit in right front impact sensor

What are the symptoms of the B1941 code?

How does a mechanic diagnose the B1941 code?

  • Using a good quality code reader/scanner, check for any airbag-related trouble codes. B1942. B1943, B1944 and B1945 may accompany this trouble code.
  • A factory wiring diagram will also be necessary for this diagnosis and repair.
  • With the ignition in ON position and headlamp switch OFF, connect the scanner and check for trouble codes.
  • Locate right front impact sensor. Check connectors, wiring and crimps for an intermittent problem. Perform a wiggle test.
  • Disconnect air bag diagnostic monitor. Measure resistance between terminals #2 and #17 of diagnostic monitor connector. NOTE: disconnecting the diagnostic monitor deactivates the entire airbag system.
  • If resistance is less than 2 ohms, replace diagnostic monitor.
  • If resistance is greater than 2 ohms, disconnect right front impact sensor from harness.
  • Measure resistance between the sensor connector’s pink/orange and yellow/white wires.
  • Resistance should be less than 2 ohms. Locate and repair any open circuits found in #617 or #624.
  • If resistance is greater than 2 ohms, replace entire right front impact sensor.
  • Clear diagnostic codes and test drive vehicle to see if codes return.

Common mistakes when diagnosing the B1941 code

As with many codes, technicians often jump ahead on a B1941 code without doing a proper process of elimination and end up replacing parts unnecessarily.

How serious is the B1941 code?

A B1941 code can result in the airbag not deploying in a collision.

What repairs can fix the B1941 code?

Additional comments for consideration regarding the B1941 code

Any airbag-related work might be best left up to a professional. Accidental deployment of the airbag can result in serious injury.

Need help with a B1941 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

How Long Does a Throttle Return Spring Last?
Not all vehicles on the road feature an electronic throttle control (ETC), which is also called drive-by-wire. For vehicles that don't offer this system, they have a throttle cable instead that...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...


Related questions

Q: Computer reads an issue with the oxygen sensor on a Subaru Forester 1999 2.0 Turbo. What is the problem?

Your 1999 Subaru Forester has pre and post catalytic converter oxygen sensors. The pre-converter sensor optimizes fuel trim while the post converter sensor monitors the efficiency of the catalytic converter. A failing pre-converter sensor will degrade vehicle MPG performance. Although...

Q: OBD-II scanner read code P0108

Hello. The MAP sensor reading on a scanner should read about 1.0 to 1.5 volts at idle and 4.5 to 4.8 volts at wide open throttle. The MAP should read 4.8 volts or more when you have the key on...

Q: P0443

Hi. There are evaporative hoses that run from the purge valve to the charcoal canister that could also have a leak in them causing the code p0443 to still be there. There also could be a problem with the charcoal...