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B1247 Lexus Code - Tire Pressure Monitor Receiver Communication Stop

Quick Answer

The B1247 diagnostic trouble code for Lexus vehicles indicates a communication failure between the tire pressure monitor receiver and other control modules in the vehicle. Common causes include Faulty tire pressure monitor receiver, Damaged wiring or connectors in the TPMS system, Software malfunction in the control modules. 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
B1247 Lexus indicates Tire Pressure Monitor Receiver Communication Stop.
Common causes
Common causes include Faulty tire pressure monitor receiver, Damaged wiring or connectors in the TPMS system, Software malfunction in the control modules.
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 11, 2024
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Code B1247 Lexus Description

The B1247 diagnostic trouble code for Lexus vehicles indicates a communication failure between the tire pressure monitor receiver and other control modules in the vehicle. The tire pressure monitoring system (TPMS) is designed to alert the driver when the tire pressure is significantly below the recommended level, helping to prevent accidents and improve fuel efficiency. When this communication stop occurs, it can lead to inaccurate tire pressure readings or a complete failure of the TPMS system.

OBDII Code B1247 Lexus - Tire Pressure Monitor Receiver Communication Stop
B1247 Lexus Code - Tire Pressure Monitor Receiver Communication Stop

Common Causes of B1247 Lexus

  1. Faulty tire pressure monitor receiver
  2. Damaged wiring or connectors in the TPMS system
  3. Software malfunction in the control modules
  4. Communication errors between modules in the vehicle
  5. Interference from external sources affecting wireless communication

Symptoms of B1247 Lexus

  1. TPMS light illuminated on the dashboard
  2. Inaccurate or unavailable tire pressure readings
  3. Loss of communication with the tire pressure monitor receiver
  4. Fluctuating tire pressure readings on the display
  5. Difficulty connecting to the TPMS system through diagnostic tools

How to Fix B1247 Lexus

  1. Begin by conducting a thorough diagnostic scan to identify the exact cause of the communication stop between the tire pressure monitor receiver and other control modules.
  2. Inspect the wiring and connectors in the TPMS system for any damage or corrosion, repairing or replacing as necessary.
  3. Test the tire pressure monitor receiver for proper functionality, replacing it if deemed faulty.
  4. Ensure that all control modules in the vehicle are communicating effectively with the TPMS system, addressing any communication errors.
  5. Clear the diagnostic trouble code and reset the TPMS system to ensure proper operation.

Cost to Fix B1247 Lexus

The cost of repairing a B1247 code for a Lexus vehicle can vary depending on the specific cause of the issue. On average, the parts and labor for this repair may range from $200 to $500. However, it is essential to note that diagnostic time and labor rates at auto repair shops can vary significantly based on location, vehicle make and model, and engine type. It is recommended to consult with a local auto repair shop for a more accurate estimate based on your specific circumstances.

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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 B1247 Lexus Code

1. What does the OBDII code B1247 indicate on a Lexus?

The code B1247 on a Lexus indicates a communication issue with the Tire Pressure Monitor Receiver, meaning the receiver is not able to communicate effectively with the vehicle’s ECU.

2. What are common symptoms of the B1247 code in a Lexus?

Common symptoms include the tire pressure monitoring system (TPMS) warning light turning on, incorrect tire pressure readings, or the system failing to display any data.

3. What can cause the B1247 code to appear on a Lexus?

Causes can include faulty TPMS receiver, damaged wiring or connectors in the TPMS system, or interference from external devices affecting the receiver’s ability to communicate.

4. How can I fix the B1247 code on my Lexus?

To fix the B1247 code, inspect and repair or replace any damaged wiring or connectors. If the TPMS receiver is faulty, it may need to be replaced. Additionally, ensure there are no external devices causing interference.

5. Is it safe to drive my Lexus with the B1247 code active?

While your car's basic drivability isn't affected, driving with an inactive TPMS could lead to driving on improperly inflated tires, which increases the risk of a tire failure and can affect vehicle handling and fuel efficiency.

6. How do I reset the TPMS system after resolving the B1247 code on a Lexus?

After repairs, the TPMS system will usually need to be reset using a specialized tool or by following a specific procedure outlined in the vehicle’s owner manual, often involving driving the vehicle at a set speed for a certain duration.

7. Can the B1247 code affect the performance of other vehicle systems?

Directly, no. The B1247 code is specific to the tire pressure monitoring system and does not impact other systems. However, ignoring it can lead to secondary issues related to tire performance and safety.

8. What tools are required to diagnose the B1247 code on a Lexus?

Diagnosing the B1247 code typically requires an OBDII scanner capable of reading body codes, a digital multimeter for checking electrical connections, and possibly a TPMS diagnostic tool.

9. How often does the B1247 code occur in Lexus vehicles?

The occurrence can vary based on model and usage conditions. However, it is not exceedingly common and is usually tied to vehicle-specific issues or external interference affecting the TPMS system.

10. Can ignoring the B1247 code lead to other diagnostic codes being triggered?

While unlikely to cause other diagnostic codes directly, ignoring it can lead to practical issues with tire maintenance, which in turn could trigger codes related to vehicle stability and handling if driving conditions deteriorate due to tire issues.

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