B1247 Lexus Code - Tire Pressure Monitor Receiver Communication Stop
Quick Answer
The main body ECU (multiplex network body ECU) and tire pressure warning ECU and receiver are connected using 2 direct lines that they use to communicate with each other. Common causes include Faulty Tire Pressure Warning ECU, Tire Pressure Warning ECU harness is open or shorted, Tire Pressure Warning ECU circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- B1247 Lexus indicates Tire Pressure Monitor Receiver Communication Stop.
- Common causes
- Common causes include Faulty Tire Pressure Warning ECU, Tire Pressure Warning ECU harness is open or shorted, Tire Pressure Warning ECU circuit poor electrical connection.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code B1247 Lexus Description
What are the Possible Causes of the DTC B1247 Lexus?
- Faulty Tire Pressure Warning ECU
- Tire Pressure Warning ECU harness is open or shorted
- Tire Pressure Warning ECU circuit poor electrical connection
- Faulty Main Body ECU (Multiplex Network Body ECU)
How to Fix the DTC B1247 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 B1247 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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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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