Ambient Light Sensor Circuit Range/Performance Problem
There's an issue with the ambient light sensor signal.
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 ambient light sensor measures light levels and adjusts things like headlights or displays; a problem here means the sensor can't read properly, affecting those adjustments.
What the computer is actually seeing
The computer expects a voltage between 0.5V (low light) and 4.5V (bright light) from the sensor. If it sees a value outside this range, it throws a B264D code.
What a healthy reading looks like
0.5V to 4.5V depending on lighting conditions during testing.
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 ambient light sensor wiring for damage or corrosion. Decision: Is the wiring intact? Yes: Proceed to step 2. No: Repair or replace wiring.
Common causes
- Faulty ambient light sensor
- Wiring harness issues
- Corroded or damaged connectors
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
Yes, but lighting functions may not work as intended.
Will this code come back after clearing?
It may if the underlying issue isn't fixed.
Why does this code appear with other light-related codes?
They can share components or circuits, indicating a broader issue.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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