Skip the auto shop - Our mechanics make house calls

B1888 OBD-II Trouble Code: Air Bag Passenger Circuit Resistance Low or Shorted Together

diagnostic check engine light

B1888 code definition

The B1888 trouble code detects a passenger airbag circuit malfunction.

What the B1888 code means

The B1888 code is a generic OBD-II trouble code that notes a circuit issue with the passenger airbag, which is the airbag located on the dashboard in front of the front passenger seat. When the airbag control module, body control module, or powertrain control module (PCM) note an insufficient resistance level from the passenger airbag circuit and the two clockspring circuits, then the B1888 trouble code is likely to be stored.

What causes the B1888 code?

Causes for the B1888 trouble code include:

  • An open or shorted circuit, or low resistance in the passenger airbag
  • An open or shorted circuit, or low resistance in one or both of the clocksprings
  • Damaged wires, harnesses, or other electrical components
  • Dust or contamination in one of the clockspring assemblies
  • In rare cases, a defective PCM, body control module, or airbag control module

What are the symptoms of the B1888 code?

The B1888 trouble code will usually be accompanied by an illuminated SRS Warning Light on the vehicle’s gauge cluster. It is likely that the passenger airbag will not deploy in the event of an accident.

How does a mechanic diagnose the B1888 code?

The B1888 code will be diagnosed with the help of an OBD-II trouble code scanner. A trained technician will use the scanner to look at the freeze frame data and assess the B1888 code, while also checking to see if there are any other trouble codes present. If the mechanic finds that there are numerous codes detected, then they will need to be diagnosed in the order in which the scanner displays them. The trouble codes will then be reset, the vehicle restarted, and the B1888 code again looked for. If the code is no longer present, then an erroneous trigger, or an intermittent error are likely to blame.

If the code is still present, then the mechanic will begin by visually inspecting all of the electrical components in the passenger airbag system. All shorted wires, open connectors and harnesses, and blown fuses will need to be replaced. The clockspring assemblies will then be inspected, and then the passenger airbag circuit, as well as the two clockspring airbag circuits will be checked.

After the technician replaces any components in the vehicle, the trouble codes will be reset, the vehicle restarted, and the B1888 code once again checked for. By doing this, the mechanic will know as soon as the code has been fixed.

Common mistakes when diagnosing the B1888 code

The most frequently made error when diagnosing the B1888 code comes from not properly abiding by the OBD-II diagnosis protocol. It is very important that technicians always follow the protocol, as it helps ensure efficient diagnoses and proper repairs.

While circuit failure is a common cause of the B1888 code, fully functional circuits are often condemned when damaged wires are overlooked.

How serious is the B1888 code?

If a vehicle has a stored B1888 code, then the passenger airbag will likely fail to deploy upon impact. Airbags are a critical safety feature that can not only limit damage to occupants, but potentially save their life. A vehicle with the B1888 code should be inspected as soon as possible, and occupants should refrain from sitting in the front passenger seat until the car has been diagnosed and repaired.

What repairs can fix the B1888 code?

Potential fixes for the B1888 trouble code are:

  • Passenger airbag circuit replacement
  • Clockspring circuits replacement
  • Cleaning, repair, or replacement of the clocksprings
  • Replacement of electrical components
  • In very rare cases, replacement of the PCM, body control module, or airbag control module

Additional comments for consideration regarding the B1888 code

The B1888 trouble code is a manufacturer specific code, which means that the definition varies depending on the automaker. This code often defines a passenger airbag circuit malfunction, but it can represent an entirely different error with different manufacturers. It is important that mechanics always take into account the vehicle they are working on when diagnosing the B1888 trouble code.

Need help with a B1888 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

The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance Related Trouble Codes: P2158: Vehicle Speed Sensor B P2160: Vehicle Speed Sensor B Circuit Low P2161:...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...


Related questions

Q: P2006 code - intake runner stuck closed

When you got a 1.6 volt reading from the test you did, this is not a normal test done for this code. Only a proper pinpoint done by a manufacturer approved test procedure would be able to diagnose the system...

Q: the car has suffocation feeling when accelerator is pressed and does not speed constantly

This sounds like a low fuel pressure problem, or an air filter and mass airflow (MAF) sensor problem. Check the fuel pressure and replace the fuel filter first to see if it helps. Next, have the system computer scanned...

Q: Air bag deploying

There have been many cases of defective airbags or systems causing a fault code to be stored in the system computer. If there is a fault code stored, the air bag will not deploy because the system has been shut...