garajizOBD-II code · manufacturer-specific
C2121
Transmitter ID 1 Not Received
- System
- C — Chassis (ABS / brakes / suspension)
- Severity
- High (4/5)
- Can I keep driving?
- Drive with caution
What does C2121 mean?
C2121 is defined as “Transmitter ID 1 Not Received”.
Drive gently and only as far as you need to; have it checked as soon as possible.
Manufacturer-specific meanings
The same code can mean something different on some makes.
- Toyota: Transmitter ID 1 Not Received
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This page is general information; an exact diagnosis needs measurements and a technician’s check.