C2124 Code - No Signal from Transmitter ID 4 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
- C2124 indicates No Signal from Transmitter ID 4 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 C2124 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 C2124?
- Faulty Tire Pressure Warning Valve and Transmitter
- Faulty Tire Pressure Warning ECU and Receiver
How to Fix the DTC C2124?
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 C2124 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.
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Information for Specific Makes
- C2124 Lexus — No Signal from Transmitter ID 4 In Main Mode
- C2124 Scion — No Signal from Transmitter ID 4 In Main Mode
- C2124 Subaru — Transmitter 4 No Data
- C2124 Toyota — No Signal from Transmitter ID 4 In Main Mode
Frequently Asked Questions about C2124 Code
1. What does the OBDII code C2124 mean?
C2124 indicates that there is no signal being received from Transmitter ID 4 in the main mode, often related to the tire pressure monitoring system (TPMS).
2. What are the common symptoms of code C2124?
Common symptoms include the TPMS warning light illuminating on the dashboard and inaccurate or missing tire pressure readings.
3. What causes the C2124 code to appear?
Common causes include a faulty TPMS sensor, a dead sensor battery, damaged wiring, or interference preventing the sensor signal from being received.
4. Can I drive with the C2124 code active?
Yes, but it’s not recommended to ignore it, as the TPMS system may not warn you about low tire pressure, increasing the risk of tire-related issues.
5. How is the C2124 code diagnosed?
A mechanic will use a TPMS scan tool to check each tire sensor for signal strength and functionality, along with inspecting the wiring and receiver module.
6. What repairs can fix the C2124 code?
Repairs may include replacing the faulty TPMS sensor, reprogramming the system, replacing sensor batteries, or repairing damaged wiring.
7. How much does it cost to fix a C2124 code?
Replacing a TPMS sensor typically costs $50 to $150 per sensor, while reprogramming or additional repairs may increase the cost.
8. Do I need to replace all sensors if one is faulty?
No, you only need to replace the faulty sensor, though it’s a good idea to check the condition of all sensors if they are the same age.
9. Can I reset the TPMS system to clear the C2124 code?
Resetting the TPMS system may temporarily clear the code, but the underlying issue must be fixed to prevent the code from returning.
10. How can I prevent the C2124 code in the future?
Regularly inspect your TPMS sensors, ensure proper tire maintenance, and replace sensors or batteries as they age to avoid signal issues.
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