Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. B1997 OBD-II Trouble Code: Passenger Side Side-Mount Air Bag Circuit Short to Ground

B1997 OBD-II Trouble Code: Passenger Side Side-Mount Air Bag Circuit Short to Ground

check engine light

B1997 code definition

The B1997 trouble code detects an air bag circuit malfunction from the side mount air bag on the passenger side.

What the B1997 code means

The B1997 code is a standard OBD-II trouble code that signals a circuit error in the side mount air bag system for the front passenger seat. The side mount air bag is located on the passenger side B-pillar, and, when the vehicle is in an accident, is deployed into the side of the front seat passenger for added protection. If the air bag control module, body control module, or powertrain control module (PCM) detect a circuit problem from the side mount air bag on the passenger side, then the B1997 trouble code is likely to be stored.

What causes the B1997 code?

The B1997 trouble code is usually caused by damaged electrical components, such as open connectors, blown fuses, or, most likely, shorted wires. These defective electrical parts may be in the passenger side mount air bag circuit, the clockspring, or even in the air bag control module. Other common causes are a failed side mount air bag system, and a damaged clockspring. An air bag control module failure can also cause the B1997 code to be stored, though this is fairly rare. In extremely rare cases, the code may be triggered by a PCM or body control module failure.

What are the symptoms of the B1997 code?

If the B1997 trouble code has been detected, then the check engine soon Warning Light may illuminate on the instrument panel, along with the air bag Warning Light. More importantly, the side mount air bag on the passenger side is unlikely to deploy in the event of an accident. It is also possible that other air bags in the system will be inoperable as well.

How does a mechanic diagnose the B1997 code?

The B1997 trouble code will be diagnosed using a standard OBD-II trouble code scanner. A trustworthy mechanic will use the scanner to look at the freeze frame data and assess the code, while also checking to see if there are any additional trouble codes present. If numerous codes are detected, then they will need to be diagnosed in the order that they are displayed in. The trouble codes will then be reset, the vehicle restarted, and the B1997 code checked for. If the code is no longer detected, then it likely was detected inaccurately, or occurred due to an intermittent error.

If the code is still present, then the technician should begin with a thorough inspection of the electrical components in the air bag system. Any damaged electrical parts will need to be replaced. The clock spring should then be inspected, followed by the side mount air bag deployment system. If the problem persists, the air bag control module should be inspected.

Whenever a component is replaced or repaired, the technician will pause the inspection, reset the trouble codes, restart the vehicle, and check for the B1977 code. This will help the mechanic know when the problem is fully resolved.

Common mistakes when diagnosing the B1997 code

The most commonly made error when diagnosing the B1997 code comes from a failure to abide by the proper OBD-II trouble code diagnosis protocol. Mechanics should always stick to the protocol at all times, to make sure that all diagnoses and repairs are accurate and efficient.

It is very common for damaged electrical components to be overlooked, which can lead to the unnecessary replacement of more costly parts, such as the clockspring or the side mount air bag system.

How serious is the B1997 code?

A vehicle with the B1997 trouble code will not have any drivability problems. However, the air bag system will likely be greatly compromised. In almost all cases, the side mount air bag on the passenger side will not deploy in the event of an accident, and in many cases, none of the air bags will deploy. air bags are a crucial safety feature that can greatly diminish damage and save lives. If possible, the vehicle should not be driven until it has been inspected and repaired.

What repairs can fix the B1997 code?

Repairs for the B1997 trouble code are:

  • Replacement of electrical components
  • Replacement of the side mount air bag system
  • Replacement of the clockspring
  • In rare cases, replacement of the air bag control module
  • In very rare cases, replacement of the body control module or PCM

Additional comments for consideration regarding the B1997 code

The B1997 trouble code is a manufacturer specific code, which means the definition changes from automaker to automaker. On many vehicles, the code detects a different issue than a side mount air bag circuit malfunction. Mechanics should always take into account the vehicle they are working on when diagnosing the B1997 code.

Need help with a B1997 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

P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem...
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...
How to Buy Fuel Treatments
Adding a fuel additive to your gas tank when you fill up is one way to clean vital engine parts of deposits, improve the performance of your engine,...

Related questions

Q: How do I replace the air bags?

Any time an air bag is deployed, it will need to be replaced. You should not drive your vehicle until the air bags have been replaced. Only a qualified mechanic or dealership should replace the air bags in your vehicle....

Q: My Mercedes Benz A-Class -160A start and dies

Wow! That's quite a list! It can be confusing when you get a whole library of codes like that.There are several things that can make that happen. One is if the car was operated with a dead battery. Another is...

Q: Throttle body error codes. Car still accelerates.

The codes should have cleared when the battery was disconnected. I would suggest driving the car as normal for a bit to see if they come back on. Chances are if the car is running normally, they have been cleared...