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Engine-Codes – Generic – C2123

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

Quick Answer

Diagnostic trouble code C2123 indicates that there is no signal coming from Transmitter ID 3 in the main mode of the vehicle's system. Common causes include Faulty Transmitter ID 3 sensor, Wiring or connector issues between the sensor and the TPMS module, TPMS module malfunction. 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 indicates No Signal from Transmitter ID 3 In Main Mode.
Common causes
Common causes include Faulty Transmitter ID 3 sensor, Wiring or connector issues between the sensor and the TPMS module, TPMS module malfunction.
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 07, 2024
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Code C2123 Description

Diagnostic trouble code C2123 indicates that there is no signal coming from Transmitter ID 3 in the main mode of the vehicle's system. This code is typically associated with tire pressure monitoring systems (TPMS) in modern vehicles. Transmitter ID 3 refers to the sensor located in the third wheel position of the vehicle. The TPMS is designed to monitor the air pressure in each tire 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 - No Signal from Transmitter ID 3 In Main Mode
C2123 Code - No Signal from Transmitter ID 3 In Main Mode

Common Causes of C2123

  1. Faulty Transmitter ID 3 sensor
  2. Wiring or connector issues between the sensor and the TPMS module
  3. TPMS module malfunction
  4. Interference from electronic devices or other external factors affecting signal transmission

Symptoms of C2123

  1. TPMS warning light illuminated on the dashboard
  2. Inaccurate or inconsistent tire pressure readings displayed on the dashboard
  3. Loss of communication with one or more tire sensors
  4. Difficulty maintaining proper tire pressure

How to Fix C2123

  1. Begin by visually inspecting the Transmitter ID 3 sensor for any visible damage or signs of wear.
  2. Check the wiring and connectors leading to the sensor for any breaks or loose connections.
  3. Use a TPMS diagnostic tool to attempt to communicate with the sensor and retrieve any error codes.
  4. If the sensor is found to be faulty, replace it with a new sensor compatible with the vehicle's TPMS system.
  5. Reset the TPMS system and perform a recalibration to ensure all sensors are functioning properly.

Cost to Fix C2123

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 make and model of the vehicle. In general, replacing a faulty TPMS sensor can range from $50 to $200 per sensor, including parts and labor. Additional costs may be incurred if there are wiring or module issues that need to be addressed. Diagnostic time and labor rates at auto repair shops typically range from $80 to $150 per hour, so it's advisable to check with local shops for a more accurate estimate.

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Code C2123 Information for Specific Makes

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 Code

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

The common symptoms of OBDII code C2123 include a malfunction indicator light (MIL) illuminated on the dashboard, tire pressure monitor system (TPMS) warning light activated, and potential loss of communication with the TPMS system.

2. What are the possible causes of OBDII code C2123?

The possible causes of OBDII code C2123 are a faulty transmitter ID 3 in main mode, issues with the TPMS sensors, wiring or communication system, low tire pressure, or a malfunctioning TPMS control module.

3. How can I diagnose the No Signal from Transmitter ID 3 In Main Mode issue?

Diagnosing OBDII code C2123 involves using a diagnostic scanner to retrieve the specific fault code, checking the TPMS sensors for proper functioning, inspecting the wiring and connections for any damage or corrosion, and verifying tire pressure levels.

4. What are some repair tips for fixing OBDII code C2123?

Repair tips for addressing OBDII code C2123 include replacing the faulty transmitter ID 3, repairing any damaged wiring or connections, ensuring proper tire pressure in all tires, and resetting the TPMS system after making necessary repairs.

5. Can I drive my vehicle with OBDII code C2123?

It is not recommended to drive your vehicle with OBDII code C2123 present, as it indicates a potential issue with the TPMS system that could compromise your safety on the road. It is advised to address the problem promptly.

6. How much does it cost to repair OBDII code C2123?

The cost to repair OBDII code C2123 can vary depending on the exact cause of the issue. Replacing a faulty transmitter ID 3 may cost around $50 to $100, while repairing wiring or addressing TPMS sensor problems could range from $100 to $300 or more.

7. Can I reset the OBDII code C2123 myself?

You can attempt to reset OBDII code C2123 yourself by using a diagnostic scanner to clear the fault code after addressing the underlying issue. However, if the problem persists, it is recommended to seek professional assistance for proper diagnosis and repair.

8. How do I prevent OBDII code C2123 from recurring?

To prevent OBDII code C2123 from recurring, it is essential to regularly monitor tire pressure, ensure proper maintenance of the TPMS system, promptly address any TPMS warning lights, and follow manufacturer recommendations for sensor replacement.

9. Is OBDII code C2123 a serious issue?

While OBDII code C2123 may not pose an immediate safety risk, it is still important to address the underlying problem to ensure the proper functioning of the TPMS system. Ignoring the issue could lead to inaccurate tire pressure readings and potential safety hazards.

10. How long does it take to repair OBDII code C2123?

The repair time for OBDII code C2123 can vary depending on the cause of the issue and the extent of repairs needed. In general, resolving this code could take anywhere from 1 to 3 hours, but it is best to consult a professional for a more accurate estimate based on your specific situation.

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