B1944 OBD-II Trouble Code: Airbag Crash Sensor #1 Ground Circuit Open

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the B1944 code

B1944 is a diagnostic trouble code (DTC) for "Airbag Crash Sensor #1 Ground Circuit Open". 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. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 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$20.00
Toyota$20.00
BMW$20.00
SCHEDULE B1944 DIAGNOSTIC Get a fair and transparent estimate upfront

B1944 code definition

A B1944 code means that the vehicle’s onboard diagnostic system has detected a discrepancy in the airbag circuit that is consistent with a poor ground on the #1 sensor, and has registered a trouble code.

What the B1944 code means

Airbag systems are designed to perform self-diagnostics. In the event of a B1944 code, voltages are off spec and indicate a poor ground in the system, registering a trouble code as part of the self-diagnostic process.

What causes the B1944 code?

  • Open ground circuit in #1 crash sensor

What are the symptoms of the B1944 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, B1943 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 left 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. Measure resistance of Pin C2-21, Circuit 6/18 (p/lg) to ground. NOTE: disconnecting the diagnostic monitor disables the entire airbag system.
  • If resistance is less than 3 ohms, remove the sensor’s mounting screws. Clean the mounting surface of sensor and chassis, reinstall sensor and tighten screws to spec.
  • If resistance is greater than 3 ohms, look for open circuit or high resistance in Circuit 618 (p/lg) and inspect all interconnections, including wire crimps.
  • Measure resistance between the sensor connector’s pink/orange and yellow/white wires.
  • Resistance should be less than 3 ohms. Locate and repair any open circuits found in #617 or #624.
  • If resistance is greater than 2 ohms, replace entire left front impact sensor.
  • Clear diagnostic codes and test drive vehicle to see if codes return.

Common mistakes when diagnosing the B1944 code

As with many codes, technicians often jump ahead on a B1944 code without doing a proper process of elimination and end up replacing parts unnecessarily. A poor reference ground can lead to a false B1944 reading, prompting unnecessary repairs.

How serious is the B1944 code?

A B1944 code can result in the airbag not deploying in the event of a collision.

What repairs can fix the B1944 code?

Additional comments for consideration regarding the B1944 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 four flashes to denote 44.

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 B1944 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.

trouble codes
OBD-II
B1944

No more waiting rooms! Our mechanics will come to you to diagnose and fix the B1944 code.

SCHEDULE B1944 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,064

Rating Summary
4,665
194
48
27
130
4,665
194
48
27
130

Mario

8 years of experience
22 reviews
Mario
8 years of experience
Chrysler PT Cruiser - Check Engine Light is on - Los Angeles, California
He was very courteous and knowledgeable. You can tell he knows his trade. Satisfied with his service.

Yoel

8 years of experience
91 reviews
Yoel
8 years of experience
Nissan Versa Note - Check Engine Light is on - Upper Darby, Pennsylvania
Yoel is very competent and provides great customer service. He took the time to explain and show me exactly what was going with my car. I will definitely use him again and recommend him to others.

Jason

31 years of experience
148 reviews
Jason
31 years of experience
Ford Explorer - Check Engine Light is on - Phoenix, Arizona
Jason was on time, friendly, explained everything he was doing and let me know the other services available, so when Jason comes back to install the new part I am having the oil changed too.

DeVaughn

25 years of experience
1 reviews
DeVaughn
25 years of experience
BMW X3 - Check Engine Light is on - Moreno Valley, California
The mechanic arrived on time, completed the work, which was replacement of an oxygen sensor, in a timely and professional manner.


More related articles

P0348 OBD-II Trouble Code: Camshaft Position Sensor A Circuit High Input (Bank 2)
Trouble code P0348 means the voltage reading from the camshaft position sensor circuit for camshaft sensor A in engine bank 2 is too high.
P2182 OBD-II Trouble Code: Engine Coolant Temperature Sensor 2 Circuit
What What the P2182 code means? P2182 is an OBD-II generic code for the engine control module (ECM) detecting the engine coolant temperature sensor (ECT) #2 does not correlate with ECT sensor #1 at cold engine start up. What...
P2407 OBD-II Trouble Code: Evap Leak Detection Pump Sense Circuit Intermittent/Erratic
P2407 P2407 code definition Evap leak detection pump sense circuit intermittent/erratic What the P2407 code means This trouble code indicates that the powertrain control module has detected a malfunction with the leak sensing portion of the emissions control system. What...

Related questions

The truck cut out suddenly

Code P0722 is an output shaft sensor code for the transmission. While that may be an indication of an issue, it would not cause the truck to just quit. A catastrophic failure of the fuel pump, ignition system, or engine...

How can I reset the computer

Unhooking the battery and jumping the positive and negative terminals should clear any trouble codes. Be sure to unhook both as this can be very dangerous if not done properly. If not experienced in doing this, I would recommend...

I scanned my mercedes ML 250 CDI 4Matic W166 with icarsoft MB 2 scanner. Its showing trouble code U144f00. What does it mean ?

The fault being reported is within a Controller Area Network (CAN) function (wiring or device) but the code itself is generic. According to MB, the particular scanner that you are using will have an accompanying description of the code as...

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.

1-800-701-6230 · hi@yourmechanic.com