Front Impact Sensor Circuit Range/Performance Problem
The front impact sensor is not operating within its expected range.
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 front impact sensor, which detects collisions, is sending a signal that's too high or too low, meaning it might not work properly in a crash.
What the computer is actually seeing
The airbag control module looks for a voltage signal from the front impact sensor. It expects this signal to be between approximately 0.5V and 4.5V under normal conditions. If it's outside this range consistently, the module triggers a fault.
What a healthy reading looks like
Normal sensor voltage should be around 2.5V when the vehicle is stationary, indicating no impact detected. Under impact conditions, this value will shift significantly.
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.
- 11. Inspect the wiring and connectors for the front impact sensor; look for frayed wires or corrosion. If any issues are found, repair them first.
- 22. Measure the voltage at the front impact sensor connector with the key on (engine off). Expect 0.5V to 4.5V. If it's out of range, replace the sensor.
- 33. If the voltage reading is fine, check the airbag control module for damage or fault codes; if unrelated faults are present, repair those first.
- 44. If all else checks out, consider replacing the airbag control module, as it may be misinterpreting the signals from the sensor.
Common causes
- Faulty front impact sensor
- Wiring issues or shorts in the sensor circuit
- Corroded or loose connections at the sensor or module
- Faulty airbag control module
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's not recommended to drive with an airbag fault; in a collision, the airbags may not deploy.
Will the code come back after clearing?
If the underlying issue is not fixed, the code will likely return.
Can this issue affect other systems in the vehicle?
Yes, issues with the airbag system may indicate problems with associated safety features.
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 →