B1920 OBD-II Trouble Code: Air Bag Passenger Circuit Failure

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the B1920 code

B1920 is a diagnostic trouble code (DTC) for "Air Bag Passenger Circuit Failure". 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 B1920 DIAGNOSTIC Get a fair and transparent estimate upfront

B1920 code definition

A B1920 trouble code indicates that a circuit failure has been detected relating to the airbag deployment system on the passenger's side.

What the B1920 code means

In the case of B1920 trouble code, the vehicle's Engine Control Unit (ECU) has registered a general failure of the passenger side airbag's circuit. If the passenger airbag's circuit isn't functioning properly, this will have the likely effect of disabling the airbag from deploying when it is triggered by the crash sensor.

What causes the B1920 code?

Disconnected, broken, damaged and otherwise faulty wiring may be to blame for a B1920 trouble code. In some cases, the airbag module itself may be faulty; if this is the case, it will need to be replaced. In rarer instances, the ECU may be reporting the issue falsely. If this has been verified, the ECU will have to be replaced independently on other issues related to the airbag system.

What are the symptoms of the B1920 code?

If a B1920 trouble code has been registered, the passenger side airbag should be considered disabled and cannot be relied upon to function in the event of a crash impact. In addition, a stored B1920 trouble code and illuminated check engine lamp will be activated for the sake of diagnosing the issue.

How does a mechanic diagnose the B1920 code?

A mechanic can diagnose the B1920 trouble code by inputting the vehicle computer with an OBD-II code reader. A voltmeter or Autohex scanner can be used to pinpoint the source of the short damage along the circuit. Any wiring related to the passenger airbag circuit should be tested for signs of fault, including damage, disconnection and/or corrosion.

Common mistakes when diagnosing the B1920 code

Trouble codes relating to the body of a vehicle (also known as "B-class" trouble codes) sometimes describe different issues depending on the particular type of vehicle in question. Your OBD-II scanner may specify the code description for you. Refer to the vehicle's user manual or contact the manufacturer if you're uncertain.

How serious is the B1920 code?

Although a B1920 trouble code will not affect a vehicle's drivability, the lack of a proper passenger side airbag feature may pose safety concerns for any passengers. If the vehicle isn't used by passengers, a lack of passenger airbag may be disregarded for the time being.

What repairs can fix the B1920 code?

Any disconnected, corroded, broken or damaged wiring should be repaired or replaced accordingly. If the ECU and/or airbag module have been cited as faulty, they will require reprogramming or replacement. Following any repairs made for a B1920 code, the vehicle should be retested to help ensure the fix has been successful.

Additional comments for consideration regarding the B1920 code

Make sure the ignition has been turned off for at least five minutes before moving on to repair anything associated with the airbag system. Accidentally triggering the airbag during repair can result in severe injury or death.

Need help with a B1920 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.

B1920
trouble codes
OBD-II

No more waiting rooms! Our mechanics will come to you to diagnose and fix the B1920 code.

SCHEDULE B1920 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

P0425 OBD-II Trouble Code: Catalyst Temperature Sensor (Bank 1)
Trouble code P0425 means the PCM detects a lack of catalyst efficiency in the catalytic converter for engine bank 1.
P2189 OBD-II Trouble Code: Sys Too Lean at Idle Bank 2
P2189 P2189 trouble code definition The most environmentally friendly and power efficient air-fuel ratio for gasoline engines that we modernly know is 14.7:1. The engine control module (ECM) is programmed to adjust things like fuel delivery and ignition timing if...
P0878 OBD-II Trouble Code: Transmission Fluid Pressure Sensor/Switch D Circuit High
P0878 means the PCM has detected an abnormal pressure within the transmission fluid sensor/switch often due too low fluid levels or malfunction.

Related questions

Multiple trouble codes, no spark, no start.

You are getting codes to each and every major sensor on the engine that is needed to run your motor. You either have a major malfunction with the ECU or a problem with the harness not being wired correctly. You...

Good morning Patrick, I have a 2007 Pontiac torrent. It refuses to accelerate and when u try to give full acceleration, it starts

Your computer is trying to protest the motor by going into failure mode and limiting the throttle opening. The overheating is the cause of the problem. You need to have the cooling system checked to see if there are any...

1999 firebird every now and then dies while driving and low engine power light comes on

A bad mass airflow (MAF) sensor can cause loss of power, no starts, and lean or rich conditions. If cleaning the sensor did not get rid of the P0102 trouble code, then replace the MAF sensor and clear 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.

1-800-701-6230 · hi@yourmechanic.com