C2123 Toyota Code - No Signal from Transmitter ID 3 In Main Mode
Quick Answer
The Tire Pressure Warning Valve and Transmitters that are installed in the tire and wheel assemblies measure the tire pressures. Common causes include Faulty Tire Pressure Warning Valve and Transmitter, Faulty Tire Pressure Warning ECU and Receiver. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- C2123 Toyota indicates No Signal from Transmitter ID 3 In Main Mode.
- Common causes
- Common causes include Faulty Tire Pressure Warning Valve and Transmitter, Faulty Tire Pressure Warning ECU and Receiver.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code C2123 Toyota Description
The Tire Pressure Warning Valve and Transmitters constantly send radio waves to the Tire Pressure Warning ECU and Receiver.
Under the conditions below, the Tire Pressure Warning ECU and Receiver is unable to receive the signals from the Tire Pressure Warning Valve and Transmitters, and a Diagnostic Trouble Code (DTC) is stored.
- Facilities or devices that use similar radio frequencies are located in the vicinity of the vehicle.
- Devices using similar radio frequencies are used in the vehicle.
- The ID of the tire pressure warning valve and transmitter is mistyped during registration.
- A tire, wheel, and/or transmitter from a different vehicle is installed.
What are the Possible Causes of the DTC C2123 Toyota?
- Faulty Tire Pressure Warning Valve and Transmitter
- Faulty Tire Pressure Warning ECU and Receiver
How to Fix the DTC C2123 Toyota?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C2123 Toyota code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the C2123 Toyota code?
Need more information on how to fix the C2123 Toyota code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the C2123 Toyota code diagnosed by a professional: Find a repair shop in your area
Information for Specific Toyota Models
- C2123 2013 Toyota RAV4 — No Signal from Transmitter ID 3 In Main Mode
- C2123 2014 Toyota RAV4 — No Signal from Transmitter ID 3 In Main Mode
- C2123 2015 Toyota RAV4 — No Signal from Transmitter ID 3 In Main Mode
- C2123 2016 Toyota RAV4 — No Signal from Transmitter ID 3 In Main Mode
- C2123 2017 Toyota RAV4 — No Signal from Transmitter ID 3 In Main Mode
- C2123 2018 Toyota RAV4 — No Signal from Transmitter ID 3 In Main Mode
Frequently Asked Questions about C2123 Toyota Code
1. What are the common symptoms of OBDII code C2123 in a Toyota?
The common symptoms include a malfunction indicator light (MIL) illuminating on the dashboard, difficulty starting the vehicle, and abnormal tire pressure readings.
2. What does the OBDII code C2123 Toyota "No Signal from Transmitter ID 3 In Main Mode" mean?
This code indicates that the tire pressure monitoring system (TPMS) is not receiving a signal from the transmitter ID 3 in main mode.
3. What are the possible causes of OBDII code C2123 in a Toyota?
Possible causes include a faulty transmitter ID 3, low tire pressure in one or more tires, a dead or low battery in the TPMS sensor, or TPMS sensor damage.
4. How can I diagnose the issue related to OBDII code C2123 in my Toyota?
You can diagnose the issue by checking the tire pressure in all tires, inspecting the TPMS sensors for damage, ensuring the sensors have sufficient battery power, and using a TPMS diagnostic tool to identify the specific problem.
5. Can I still drive my Toyota with OBDII code C2123 present?
It is generally safe to drive the vehicle with this code, but it is important to address the underlying issue as soon as possible to ensure proper tire pressure monitoring and safe operation.
6. How can I repair OBDII code C2123 in my Toyota?
Repair options include replacing the faulty transmitter ID 3, inflating tires to the correct pressure, replacing TPMS sensors with low battery levels, or repairing damaged TPMS sensors.
7. Is it possible to reset OBDII code C2123 in a Toyota without fixing the underlying issue?
Resetting the code without addressing the problem will only temporarily turn off the MIL. The issue will likely recur until the root cause is resolved.
8. How much does it typically cost to repair OBDII code C2123 in a Toyota?
Repair costs can vary depending on the specific issue causing the code. Replacement TPMS sensors can range from $50 to $200 per sensor, not including labor charges.
9. Can a DIY enthusiast fix OBDII code C2123 in a Toyota?
DIY enthusiasts with experience in automotive repairs may be able to address this code by following repair guides and using the necessary tools. However, professional diagnosis and repair are recommended for accurate and efficient resolution.
10. How often should I check my Toyota's tire pressure to prevent OBDII code C2123 from occurring?
Regularly checking tire pressure at least once a month or before long trips is recommended to maintain proper tire pressure and prevent TPMS-related issues like code C2123 from arising.
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