Key Not Detected
This code indicates the vehicle's computer cannot detect the key fob 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 car's computer isn't picking up the signal from your key fob, which makes it unable to start, as it doesn't recognize the key as valid.
What the computer is actually seeing
The vehicle's security system expects a valid signal from the key fob for startup; if it doesn't receive this, it sets the B1260 code.
What a healthy reading looks like
The key fob should transmit a specific frequency (usually around 433 MHz for most systems) that the vehicle's receiver expects to see within milliseconds after ignition is turned 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 key fob battery voltage; it should be around 3 volts. Replace if low or dead.
- 2Inspect the key fob for any visible damage or corrosion.
- 3Test the key fob with a secondary method (e.g., another vehicle or a key fob tester) to see if it transmits correctly.
- 4Check wiring and connectors related to the key receiver for loose connections or damage.
- 5Using a scan tool, clear the code and attempt to restart the vehicle; if the code reappears immediately, further inspection of the receiver module is needed.
Common causes
- Weak or dead key fob battery
- Faulty key fob transmitter
- Issues with the vehicle's key receiver module
- Wiring problems between the receiver and the computer
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive with this code?
It's not safe — your vehicle may not start or could stall unexpectedly.
Will this code come back?
Yes, if the underlying issue isn't addressed, the code will reappear.
Why does it appear with other codes?
It's common for related systems to fail together, especially those tied to vehicle security.
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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