Engine-CodesLexus – C2122 Lexus

C2122 Lexus Code - No Signal from Transmitter ID 2 In Main Mode

Quick Answer

The C2122 diagnostic trouble code for Lexus vehicles indicates that there is no signal being received from Transmitter ID 2 in the main mode. Common causes include Faulty TPMS sensor in Transmitter ID 2, Wiring or connection issues between the TPMS sensor and control module, TPMS control 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
C2122 Lexus indicates No Signal from Transmitter ID 2 In Main Mode.
Common causes
Common causes include Faulty TPMS sensor in Transmitter ID 2, Wiring or connection issues between the TPMS sensor and control module, TPMS control 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.
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code C2122 Lexus Description

The C2122 diagnostic trouble code for Lexus vehicles indicates that there is no signal being received from Transmitter ID 2 in the main mode. This code is typically associated with the tire pressure monitoring system (TPMS) in the vehicle. The TPMS is responsible for monitoring the air pressure in the tires and alerting the driver if there is a significant drop in pressure. Transmitter ID 2 refers to the specific sensor in the tire that is not transmitting a signal.

OBDII Code C2122 Lexus - No Signal from Transmitter ID 2 In Main Mode
C2122 Lexus Code - No Signal from Transmitter ID 2 In Main Mode

Common Causes of C2122 Lexus

  1. Faulty TPMS sensor in Transmitter ID 2.
  2. Wiring or connection issues between the TPMS sensor and control module.
  3. TPMS control module malfunction.
  4. Low battery in the TPMS sensor.
  5. Interference from external sources affecting the TPMS signal.

Symptoms of C2122 Lexus

  1. TPMS warning light illuminated on the dashboard.
  2. Inaccurate tire pressure readings displayed on the dashboard.
  3. Fluctuating tire pressure readings while driving.
  4. Loss of communication with the TPMS system.

How to Fix C2122 Lexus

  1. Begin by checking the tire pressure in all four tires manually to ensure they are properly inflated.
  2. Use a TPMS tool to diagnose the specific sensor (Transmitter ID 2) that is not transmitting a signal.
  3. Replace the faulty TPMS sensor if necessary.
  4. Inspect the wiring and connections for any damage or corrosion, repairing or replacing as needed.
  5. Reset the TPMS system and recalibrate the sensors to ensure proper communication.

Cost to Fix C2122 Lexus

The cost of repairing a no signal from Transmitter ID 2 in main mode issue can vary depending on the specific cause of the problem. On average, replacing a TPMS sensor can cost between $50 to $100 per sensor, not including labor. The total repair cost, including parts and labor, could range from $100 to $300. It's important to note that labor rates at auto repair shops can vary, so it's recommended to obtain quotes from multiple shops to get an accurate estimate.

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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 C2122 Lexus Code

1. What are the common symptoms of OBDII code C2122 in a Lexus?

The common symptoms include the tire pressure warning light being illuminated on the dashboard and a message indicating "No Signal from Transmitter ID 2 In Main Mode."

2. What could be the cause of OBDII code C2122 in a Lexus?

The most common cause is a malfunctioning or low battery in the tire pressure sensor attached to the wheel corresponding to Transmitter ID 2.

3. How can I diagnose the issue related to OBDII code C2122 in a Lexus?

You can diagnose the issue by using a diagnostic scan tool to read the specific code and identify which tire pressure sensor is causing the problem.

4. Can I still drive my Lexus with OBDII code C2122 present?

Yes, you can still drive the vehicle, but it is recommended to address the issue promptly to ensure proper tire pressure monitoring and safety.

5. How can I reset OBDII code C2122 in a Lexus?

You can reset the code by fixing the underlying issue with the tire pressure sensor and then using a diagnostic scan tool to clear the error code.

6. Is it possible to repair OBDII code C2122 in a Lexus without professional help?

If you have experience working with automotive electronics, you may be able to replace the malfunctioning tire pressure sensor yourself. Otherwise, it's recommended to seek professional assistance.

7. Are there any maintenance tips to prevent OBDII code C2122 from recurring?

Regularly checking and maintaining proper tire pressure, as well as replacing the tire pressure sensors as recommended by the manufacturer, can help prevent the recurrence of this code.

8. Can extreme weather conditions affect OBDII code C2122 in a Lexus?

Yes, extreme temperature changes or harsh weather conditions can impact the performance of tire pressure sensors, potentially leading to the activation of this diagnostic trouble code.

9. How long does it typically take to repair OBDII code C2122 in a Lexus?

The repair time can vary depending on the exact cause of the issue and the availability of replacement parts, but it generally takes around 1-2 hours at a repair shop.

10. Will OBDII code C2122 cause any other problems in my Lexus if left unaddressed?

Leaving this issue unresolved may lead to inaccurate tire pressure monitoring and potentially compromise safety, so it's important to address it in a timely manner.

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