B1249 Code - Double Locking ECU Communication Stop
Quick Answer
The Diagnostic Trouble Code (DTC) B1249 is stored when communication between the Double Lock Door Control Relay and Main Body ECU stops for more than 10 seconds. Common causes include Faulty Double Lock Door Control Relay, Double Lock Door Control Relay harness is open or shorted, Double Lock Door Control Relay circuit poor electrical connection. 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
- B1249 indicates Double Locking ECU Communication Stop.
- Common causes
- Common causes include Faulty Double Lock Door Control Relay, Double Lock Door Control Relay harness is open or shorted, Double Lock Door Control Relay circuit poor electrical connection.
- 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.
Code B1249 Description
What are the Possible Causes of the DTC B1249?
- Faulty Double Lock Door Control Relay
- Double Lock Door Control Relay harness is open or shorted
- Double Lock Door Control Relay circuit poor electrical connection
- Faulty Main Body ECU
How to Fix the DTC B1249?
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 B1249 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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Information for Specific Makes
- B1249 Lexus — Double Locking ECU Communication Stop
- B1249 Scion — Double Locking ECU Communication Stop
- B1249 Toyota — Double Locking ECU Communication Stop
Frequently Asked Questions about B1249 Code
1. What are the common symptoms of OBDII code B1249, Double Locking ECU Communication Stop?
- Common symptoms include the inability to lock or unlock the doors remotely, malfunctioning interior lights, and issues with the alarm system.
2. What are the possible causes of OBDII code B1249?
- Possible causes include damaged wiring harnesses, faulty door lock actuators, a malfunctioning double locking ECU, or issues with the communication network between modules in the vehicle.
3. How can I diagnose the issue causing OBDII code B1249?
- Diagnosing the issue may involve checking the wiring connections, inspecting the door lock actuators, and using a scan tool to communicate with the double locking ECU to identify any communication faults.
4. What are some repair tips for fixing OBDII code B1249?
- Repair tips may include repairing or replacing damaged wiring, testing and replacing faulty door lock actuators, resetting or reprogramming the double locking ECU, and ensuring proper communication between vehicle modules.
5. Can OBDII code B1249 be cleared/reset without fixing the underlying issue?
- While the code can be cleared temporarily, it is important to address the underlying issue causing the communication stop to prevent the code from reoccurring and ensure proper functioning of the vehicle's locking system.
6. Is it safe to continue driving with OBDII code B1249 present?
- It may be safe to drive with this code, but it is recommended to address the issue promptly to avoid potential security risks or further damage to the vehicle's locking system.
7. How much does it typically cost to repair OBDII code B1249?
- The cost of repair can vary depending on the specific cause of the issue, but it may involve expenses for parts replacement, labor, and diagnostic services from a professional mechanic or dealership.
8. Can I fix OBDII code B1249 myself, or should I seek professional help?
- Depending on your level of automotive knowledge and experience, you may attempt to diagnose and repair the issue yourself. However, seeking professional help from a qualified mechanic or dealership is advisable for accurate diagnosis and proper repair.
9. Are there any preventative measures to avoid OBDII code B1249 in the future?
- Regular maintenance of the vehicle's locking system, checking for any signs of wear or damage, and addressing any related issues promptly can help prevent the occurrence of OBDII code B1249 in the future.
10. Will fixing OBDII code B1249 improve the overall functionality of my vehicle's locking system?
- Yes, addressing and resolving OBDII code B1249 should improve the functionality of your vehicle's locking system, allowing for proper remote locking and unlocking, as well as ensuring the security features operate correctly.
Discuss the causes and fixes for B1249 OBDII Code
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