If your car is showing the B0081 engine code, your Passenger Presence System (PPS) is likely having problems. While this doesn’t pose an immediate threat while driving, this issue should be diagnosed as soon as possible to ensure all airbags deploy properly.

Diagnostic trouble codes (DTCs) are a great help for identifying problems that your car engine is having. An OBD-II code reader will let you see which codes are active, but understanding the meaning behind specific engine codes is important so that you can evaluate the problem before proceeding with any fixes.

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, the trustworthy insurance comparison app known for saving drivers money on car insurance, will help you protect your car with expert information on DTCs, as well as savings on car insurance. In this article, we’ve compiled information about the B0081 engine code so you’re prepared for it and how much it would cost to fix.

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What does the engine code B0081 mean?

Definition: Passenger Presence System (PPS) problem

The B0081 engine code indicates a problem with your car’s Passenger Presence System, which monitors what is occupying the front passenger seat to determine if the airbag should be disabled.

How much will it cost to fix?

Running a diagnostic for the B0081 will cost one hour of labor, which will likely come out to $75 to $150 per hour.

The total cost of parts and labor would depend on what component of the PPS needs to be replaced. For example, the airbag occupant sensor would cost $481 to $505.

What can cause the B0081 engine code?

If your car is showing the B0081 engine code, a component of your PPS is likely not properly functioning. A faulty airbag occupant sensor is one of the causes of this engine code. You can also check the subcodes to pinpoint the issue:

B0081 0F—Passenger Presence System Erratic

B0081 3A—Passenger Presence System Incorrect Component Installed

B0081 4B—Passenger Presence System Calibration Not Learned

B0081 5A—Passenger Presence System Plausibility Failure

B0081 39—Passenger Presence System Internal Electronic Failure

B0081 71—Passenger Presence System Invalid Serial Data Received

The PPS is part of the Supplemental Restraint System (SRS), which is also known as the airbag system. The PPS components include the PPS control modules, sensors in the seat, the wiring harness, and the passenger on/off indicator. These components work together to determine if the front passenger airbag should be disabled based on the weight on the seat.

Other potential issues that could cause this engine code include:

Passenger Presence System (PPS) harness is open or shorted

Passenger Presence System (PPS) has a poor electrical circuit connection

Faulty Inflatable Restraint Sensing and Diagnostic Module (SDM)

MORE:

Does car insurance cover engine fires?

Common symptoms of the B0081 engine code

You may not see many symptoms accompanying this engine code other than the

airbag indicator light

turning on. Other potential signs to watch for include:

SRS system performance issues

How serious is the B0081 engine code?

The B0081 engine code typically doesn’t cause driveability issues, but it shouldn’t be ignored. If you don’t deal with the issue promptly, it could lead to a fatality in an accident if the airbags are not activated or disabled accordingly.

Can I fix the B0081 engine code myself?

It may be possible to fix the B0081 engine code at home, but you must diagnose the issue correctly before beginning any repairs. Depending on the source of the problem, you may need to:

Repair the passenger presence module

Reinstall the PPS module

Recalibrate the PPS

These can be complicated procedures and could lead to a high repair cost if it is done incorrectly. If you’re not sure what repairs your car needs, it’s a good idea to bring it to a professional for a thorough diagnostic inspection and repairs.

Repairing the passenger presence system

If you do decide to repair the PPS yourself, you’ll need to follow these steps:

Clear code to see if it returns—sometimes it’s a history code that pops up intermittently

Resolve other DTCs before tackling the B0081 code—other codes can affect the PPS module operation

Identify the correct part number to ensure you get the right items

Check the circuit between the SDM and PPS to ensure it is not damaged. Also, check that the PPS module is properly powered and grounded

Check the modules to make sure the software is up to date. You may only need to update the module instead of replacing the PPS modules. In some cases, the SDM may need replacing

MORE:

What does the check engine light mean?

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