B1943 OBD-II Trouble Code: Airbag Crash Sensor #1 Short to Ground

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the B1943 code

B1943 is a diagnostic trouble code (DTC) for "Airbag Crash Sensor #1 Short to Ground". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE B1943 DIAGNOSTIC Get a fair and transparent estimate upfront

B1943 code definition

A B1943 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 B1943 code means

Air bag systems are designed to perform self-diagnostics. In the event of a B1943 code, voltages are off spec at certain terminals in the system, registering a trouble code as part of the self-diagnostic process.

What causes the B1943 code?

  • Short circuit in #1 crash sensor
  • Open circuit in left front impact sensor

What are the symptoms of the B1943 code?

How does a mechanic diagnose the B1943 code?

  • Using a good quality code reader/scanner, check for any airbag-related trouble codes. B1942. B1941, 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. Check for any dirt, corrosion, damage or other physical problems with sensor, wiring, terminals and connectors.
  • Disconnect air bag diagnostic monitor and check resistance on terminals. NOTE: disconnecting the diagnostic monitor disables 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 B1943 code

As with many codes, technicians often jump ahead on a B1943 code without doing a proper process of elimination and end up replacing parts unnecessarily.

How serious is the B1943 code?

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

What repairs can fix the B1943 code?

Additional comments for consideration regarding the B1943 code

On many Ford vehicles, the air bag warning light will flash to alert the driver to a problem. The light will flash an indication of the code itself. In this case, it would flash four times, followed by a pause, followed by three flashes to denote 43.

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

Need help with a B1943 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.

OBD-II
trouble codes
B1943

No more waiting rooms! Our mechanics will come to you to diagnose and fix the B1943 code.

SCHEDULE B1943 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P0927 OBD-II Trouble Code: Gear Shift Reverse Actuator Circuit High
P0927 code means the ECM detected a higher than normal voltage within the gear shift reverse actuator often due too mechanical issues.
P2314 OBD-II Trouble Code: Ignition Coil Secondary Number 5 Circuit Condition
P2314 means the secondary ignition burn time is either too short, incorrectly timed, or not present. This is usually due to a bad circuit issue.
B1968 OBD-II Trouble Code: AC Water Pump Detection Circuit Failure
B1968 means the air conditioner water pump is not working properly. This is likely due to damaged electrical components in the AC system

Related questions

Saturn Ion wont change to 4th gear, its an automatic. The P0700 code comes up saying transaxal module. What does this means?
Hello. The code means there is either an electrical or mechanical (hydraulic) fault in the transmission, or the transmission "controls" and in your case that fault is causing your transmission not to shift. The fault itself can range from the...
Brake problems
Although I'm not there to inspect your Ford Super Duty, it would seem logical to inspect your Electronic Brake Control Module (EBCM) (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-electronic-brake-control-module-ebcm). This component reads all of the braking system’s sensors and activates the ABS or traction control system...
My car is a Nissan Navara. My Check Engine Light is on and my acceleration is not well.
Hi there. It seems that the engine you have is a diesel engine. The code P2002 (https://www.yourmechanic.com/article/p2002-obd-ii-trouble-code-diesel-particulate-filter-efficiency-below-threshold-bank-1-by-logan-utsman) is coming up for the particulate filter and it has an efficiency issue. The only thing to do with this is replace the...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com