Passenger Side Airbag Circuit Low Voltage
The passenger side airbag circuit is detecting a low voltage condition.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The airbag system is seeing a low voltage signal from the passenger side airbag, which means it might not deploy properly in a crash.
What the computer is actually seeing
The airbag control module monitors the voltage of the passenger side airbag circuit. It expects to see a voltage between 2.0 and 4.5 volts; if it drops below that, it triggers the B1622 code.
What a healthy reading looks like
2.0 to 4.5 volts on the passenger airbag circuit when ignition is on.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check the integrity of the airbag system wiring and connectors, especially at the passenger seat. Look for frays, cuts, or corrosion.
- 2Using a multimeter, measure the voltage at the airbag connector. You should see between 2.0 and 4.5 volts with the ignition on. If it's low or zero, proceed to the next step.
- 3Inspect the airbag module for fault codes using a scanner. If B1622 is present but no other related codes show up, focus on the airbag and associated circuit.
- 4Test the continuity of the wiring between the airbag module and the passenger airbag. Replace any damaged wiring or connectors. If everything checks out, the airbag itself may be faulty.
Common causes
- Damaged wiring or connectors in the airbag circuit
- Faulty airbag module
- Short to ground in the passenger airbag circuit
- Defective passenger side airbag sensor
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
It's not recommended to drive with an airbag fault. The airbag might not deploy in a crash, increasing injury risk.
Will the code come back after clearing it?
If the issue isn't fixed, the code will likely return after clearing, as the problem still exists.
Why does it pair with other airbag codes?
Airbag systems are interconnected, so faults can affect multiple circuits, triggering related codes.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →