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B1888 is a diagnostic trouble code (DTC) for "Air Bag Passenger Circuit Resistance Low or Shorted Together". 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.
The B1888 trouble code detects a passenger airbag circuit malfunction.
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.
Causes for the B1888 trouble code include:
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.
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.
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.
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.
Potential fixes for the B1888 trouble code are:
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.
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