Passenger Side Airbag Deployment Command
This code means there's a problem with the passenger airbag deployment circuit.
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 computer isn't getting the right signal to activate the passenger side airbag, which means it might not work in a crash.
What the computer is actually seeing
The airbag control module monitors the circuit that sends the deployment signal to the passenger airbag. It expects a voltage signal between 0.5V and 2.5V when the key is on, ignitor off. If it sees a voltage out of this range or no voltage when it should, it triggers code B0027.
What a healthy reading looks like
Voltage at airbag deployment circuit should be between 0.5V to 2.5V; anything outside this range indicates a fault.
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.
- 1Step 1: Inspect the airbag system wiring and connectors for visual damage. Check for corroded pins or loose connections.
- 2Step 2: Using a multimeter, check the voltage at the passenger airbag deployment circuit connector with the key on. Expect 0.5V to 2.5V.
- 3Step 3: If voltage is out of spec, check the integrity of wires leading to the airbag module. Look for opens or shorts using a continuity test.
- 4Step 4: If wiring is good, replace the passenger airbag sensor as it may be faulty. Check for an updated part number and fit.
- 5Step 5: Clear the code and test drive the vehicle to see if the code returns.
Common causes
- Damaged airbag module
- Open or shorted wires in the airbag circuit
- Faulty passenger airbag sensor
- Connector corrosion or poor contact
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderately safe but you won't have a functional passenger airbag in an accident.
Will the code come back after repair?
If the issue is fixed correctly, the code should not return.
Why might this code be paired with B0026?
B0026 indicates a similar issue, often in the deployment circuit affecting the driver or passenger side.
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 →