C2123
No Signal from Transmitter ID 3 In Main Mode
C2123 is an OBD-II diagnostic trouble code meaning: No Signal from Transmitter ID 3 In Main Mode. Common causes: transmitter id 3 fault, open or short circuit in wiring harness. Estimated repair cost: $33–167.
Symptoms
- Check Engine light comes on
- There may be problems with systems that depend on the ID 3 transmitter.
- Restrictions in the operation of the transmission or other systems
Causes
- Transmitter ID 3 fault
- Open or short circuit in wiring harness
- Transmitter power problems
- Main control module malfunction
- Corrosion or poor contact in connectors
How to Fix
- Carry out CAN bus diagnostics using a scanner
- Check the power supply and ground of the ID 3 transmitter
- Inspect the wiring harness for damage
- Check connectors for corrosion and integrity of contacts
- If necessary, replace the transmitter or repair the wiring harness
- Clear error codes and check for reoccurrence
Related codes
FAQ
What does the C2123 code mean?
C2123 is an OBD-II diagnostic trouble code that indicates: No Signal from Transmitter ID 3 In Main Mode
What causes a C2123 error code?
The most common causes of C2123 include: Transmitter ID 3 fault; Open or short circuit in wiring harness; Transmitter power problems; Main control module malfunction.
How do I fix a C2123 diagnostic trouble code?
To fix C2123: Carry out CAN bus diagnostics using a scanner. Check the power supply and ground of the ID 3 transmitter. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C2123?
Limited driving only, diagnose soon
How much does it cost to fix C2123?
The estimated repair cost for C2123 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat