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C2123 Scion Code - No Signal from Transmitter ID 3 In Main Mode

Quick Answer

The C2123 diagnostic trouble code (DTC) for Scion vehicles indicates that there is no signal being received from Transmitter ID 3 in the main mode. Common causes include Faulty Transmitter ID 3 tire pressure sensor, TPMS module malfunction, Wiring or connection issues between the sensor and the module. 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 Scion indicates No Signal from Transmitter ID 3 In Main Mode.
Common causes
Common causes include Faulty Transmitter ID 3 tire pressure sensor, TPMS module malfunction, Wiring or connection issues between the sensor and the module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 18, 2024
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Code C2123 Scion Description

The C2123 diagnostic trouble code (DTC) for Scion vehicles indicates that there is no signal being received from Transmitter ID 3 in the main mode. This code is typically related to the tire pressure monitoring system (TPMS) in the vehicle. The TPMS is designed to monitor the air pressure in the tires and alert the driver if there is a significant drop in pressure, which could affect the vehicle's handling and fuel efficiency.

OBDII Code C2123 Scion - No Signal from Transmitter ID 3 In Main Mode
C2123 Scion Code - No Signal from Transmitter ID 3 In Main Mode

Common Causes of C2123 Scion

  1. Faulty Transmitter ID 3 tire pressure sensor
  2. TPMS module malfunction
  3. Wiring or connection issues between the sensor and the module
  4. Low battery in the tire pressure sensor
  5. Interference from other electronic devices affecting the signal transmission

Symptoms of C2123 Scion

  1. TPMS warning light illuminated on the dashboard
  2. Inaccurate tire pressure readings displayed on the instrument cluster
  3. Loss of communication with the TPMS module
  4. Decreased fuel efficiency due to improper tire pressure

How to Fix C2123 Scion

  1. Begin by checking the tire pressure in all four tires manually to ensure they are properly inflated.
  2. Inspect the Transmitter ID 3 tire pressure sensor for any visible damage or signs of malfunction.
  3. Use a TPMS diagnostic tool to attempt to reprogram the sensor and establish communication with the TPMS module.
  4. If reprogramming is unsuccessful, replace the Transmitter ID 3 tire pressure sensor with a new one.
  5. Clear the DTC from the vehicle's computer memory using an OBD-II scanner to reset the TPMS system.

Cost to Fix C2123 Scion

The cost of repairing a no signal from Transmitter ID 3 in main mode issue can vary depending on the specific cause of the problem and the cost of parts and labor. On average, the cost of replacing a faulty tire pressure sensor can range from $50 to $200 per sensor, not including labor costs. Labor rates at auto repair shops typically range from $80 to $150 per hour. It's recommended to check with local repair shops for a more accurate estimate based on your location and vehicle model.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C2123 Scion Code

1. What are the common symptoms of OBDII code C2123 in a Scion?

- Common symptoms include a malfunction indicator light (MIL) illuminated on the dashboard, issues with the tire pressure monitoring system (TPMS), and the inability to receive data from Transmitter ID 3 in Main Mode.

2. What could be causing the OBDII code C2123 in my Scion?

- The code C2123 typically indicates a problem with the transmitter ID 3, which is responsible for sending tire pressure data to the TPMS control module. Possible causes include a faulty transmitter, low battery in the transmitter, or issues with the TPMS control module.

3. How can I diagnose the root cause of OBDII code C2123 in my Scion?

- To diagnose the issue, you can start by checking the battery level in the transmitter ID 3. If the battery is good, you may need to perform a TPMS relearn procedure or test the TPMS sensors using a diagnostic tool.

4. Can I repair OBDII code C2123 in my Scion myself?

- Depending on the cause of the issue, you may be able to repair it yourself. Replacing the battery in the transmitter ID 3 is a relatively simple task, but for more complex issues, it is recommended to seek assistance from a professional mechanic.

5. Is it safe to continue driving with OBDII code C2123 present in my Scion?

- While the code itself may not pose an immediate safety risk, driving with a malfunctioning TPMS system can compromise your ability to monitor tire pressures accurately. It is advised to address the issue promptly to ensure proper functionality of the TPMS.

6. How much does it typically cost to repair OBDII code C2123 in a Scion?

- The cost of repairing OBDII code C2123 can vary depending on the underlying issue. Replacing the transmitter battery may cost around $20-$50, while more complex repairs involving the TPMS control module could cost several hundred dollars.

7. Will resetting the OBDII code C2123 in my Scion make it go away permanently?

- Resetting the code may temporarily clear the MIL light, but if the underlying issue is not fixed, the code is likely to reappear. It is important to diagnose and address the root cause of the problem to prevent recurrence.

8. Can extreme weather conditions affect OBDII code C2123 in a Scion?

- Yes, extreme temperatures or weather conditions can impact the performance of the TPMS system and potentially trigger code C2123. It is important to keep the TPMS sensors and transmitters in good condition to prevent issues.

9. Are there any recalls or technical service bulletins related to OBDII code C2123 in Scion vehicles?

- It is recommended to check with your local Scion dealership or the manufacturer's website for any recalls or technical service bulletins related to OBDII code C2123. Keeping up to date with such information can help in addressing the issue effectively.

10. How long does it typically take to repair OBDII code C2123 in a Scion?

- The repair time for OBDII code C2123 can vary depending on the exact cause of the issue and the complexity of the repair. Simple fixes like replacing the transmitter battery may take less than an hour, while more involved repairs could take several hours or more.

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