AutoCodes – Lexus – C2171 Lexus

C2171 Lexus Code - Transmitter ID not Registered

Quick Answer

The IDs of each tire pressure warning valve and transmitter are registered to the Tire Pressure Warning ECU and Receiver. Common causes include 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: C2171 Lexus indicates Transmitter ID not Registered.
Common causes: Common causes include 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.

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Code Popularity 1,357

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 21, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C2171 Lexus Description

The IDs of each tire pressure warning valve and transmitter are registered to the Tire Pressure Warning ECU and Receiver. When the Tire Pressure Warning ECU and Receiver detect that a transmitter ID code is not registered in the ECU, a Diagnostic Trouble Code (DTC) is output.

OBDII Code C2171 Lexus - Transmitter ID not Registered - AutoCodes.com — C2171 Lexus Code - Transmitter ID not Registered

What does this mean?

What are the Possible Causes of the DTC C2171 Lexus?

Faulty Tire Pressure Warning ECU and Receiver

How to Fix the DTC C2171 Lexus?

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 C2171 Lexus 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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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 C2171 Lexus Code

1. What are the common symptoms of OBDII code C2171 in a Lexus related to "Transmitter ID not Registered"?

- Common symptoms include difficulty starting the vehicle, remote keyless entry issues, and a malfunctioning tire pressure monitoring system.

2. What could cause the OBDII code C2171 in a Lexus indicating "Transmitter ID not Registered"?

- The code C2171 is typically triggered when the vehicle's tire pressure monitoring system (TPMS) receiver cannot recognize the transmitter IDs from the tire pressure sensors.

3. How can I diagnose the OBDII code C2171 in a Lexus for the "Transmitter ID not Registered" issue?

- To diagnose this issue, you can use a TPMS tool to check the transmitter IDs from each tire pressure sensor and ensure they are properly registered with the TPMS receiver.

4. Are there any DIY repair tips for resolving the OBDII code C2171 related to "Transmitter ID not Registered" in a Lexus?

- DIY repair tips include checking and reprogramming the transmitter IDs using a TPMS tool, ensuring all tire pressure sensors are functioning correctly, and replacing any faulty sensors if necessary.

5. Can a low tire pressure or a dead battery in the key fob trigger the OBDII code C2171 in a Lexus for "Transmitter ID not Registered"?

- Yes, low tire pressure or a dead battery in the key fob can sometimes lead to the "Transmitter ID not Registered" issue, causing the OBDII code C2171 to be triggered.

6. What role does the TPMS receiver play in the OBDII code C2171 in a Lexus indicating "Transmitter ID not Registered"?

- The TPMS receiver is responsible for communicating with the tire pressure sensors and registering their transmitter IDs. If it cannot recognize the IDs, it can trigger the code C2171.

7. Is it safe to continue driving with the OBDII code C2171 related to "Transmitter ID not Registered" in a Lexus?

- While the vehicle may still be operable, it is not recommended to ignore the issue as it can affect the accuracy of the tire pressure monitoring system, potentially compromising safety.

8. How much does it typically cost to repair the OBDII code C2171 in a Lexus due to "Transmitter ID not Registered"?

- The cost of repair can vary depending on the exact cause of the issue. It may involve reprogramming the transmitter IDs, replacing faulty sensors, or addressing other underlying problems.

9. Are there any known recalls or technical service bulletins related to the OBDII code C2171 in a Lexus for "Transmitter ID not Registered"?

- It's recommended to check with a Lexus dealership or online resources for any recalls or technical service bulletins related to the OBDII code C2171 to see if there are known issues or solutions provided by the manufacturer.

10. How can proper maintenance help prevent the OBDII code C2171 in a Lexus indicating "Transmitter ID not Registered" from occurring?

- Regularly checking tire pressure, replacing key fob batteries when needed, and addressing any TPMS warnings promptly can help prevent the occurrence of the "Transmitter ID not Registered" issue and the associated OBDII code C2171.