U1555 Buick Code - Body Control Module Lost Communication With Left Rear Seat Heating/Venting/Cooling Switch On LIN Bus
Quick Answer
The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. Common causes include Faulty Left Rear Seat Heating/Venting/Cooling Switch, Left Rear Seat Heating/Venting/Cooling Switch harness is open or shorted, Left Rear Seat Heating/Venting/Cooling Switch 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
- U1555 Buick indicates Body Control Module Lost Communication With Left Rear Seat Heating/Venting/Cooling Switch On LIN Bus.
- Common causes
- Common causes include Faulty Left Rear Seat Heating/Venting/Cooling Switch, Left Rear Seat Heating/Venting/Cooling Switch harness is open or shorted, Left Rear Seat Heating/Venting/Cooling Switch 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 U1555 Buick Description
What are the Possible Causes of the DTC U1555 Buick?
- Faulty Left Rear Seat Heating/Venting/Cooling Switch
- Left Rear Seat Heating/Venting/Cooling Switch harness is open or shorted
- Left Rear Seat Heating/Venting/Cooling Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC U1555 Buick?
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 U1555 Buick 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 U1555 Buick Code
1. What are the common symptoms of OBDII code U1555 in a Buick related to the Body Control Module losing communication with the left rear seat heating/venting/cooling switch on the LIN bus?
- Common symptoms include non-functional left rear seat heating, venting, or cooling features, as well as potential issues with other electronic components in the vehicle.
2. What are possible causes of the U1555 code in a Buick, indicating a communication error between the Body Control Module and the left rear seat switch?
- Causes may include a faulty left rear seat switch, damaged wiring or connectors in the LIN bus network, a malfunctioning Body Control Module, or software issues.
3. How can I diagnose the U1555 code in my Buick to pinpoint the exact cause of the communication loss with the left rear seat switch?
- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific codes, checking the wiring and connectors for damage, and testing the components involved for proper functionality.
4. Is it safe to continue driving my Buick with the U1555 code related to the Body Control Module and left rear seat switch communication issue?
- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to prevent any potential further electrical problems in the vehicle.
5. Can I repair the U1555 code related to the left rear seat switch communication issue in my Buick myself, or do I need to take it to a professional mechanic?
- Depending on your experience with automotive electronics, you may be able to address simpler causes like loose connectors or blown fuses. However, for more complex issues with the Body Control Module or wiring, it is advisable to seek professional help.
6. Are there any DIY tips for troubleshooting and potentially fixing the U1555 code in a Buick without specialized tools?
- You can start by checking all relevant fuses, inspecting visible wiring for damage, and ensuring connectors are securely attached. Sometimes, a simple reset of the vehicle's electronics may also resolve the communication issue temporarily.
7. How much can I expect to pay to repair the U1555 code in my Buick if I take it to a professional mechanic?
- Repair costs for this code can vary depending on the exact cause of the communication error. Expect to pay for diagnostic time, parts replacement (if necessary), and labor, which could range from a hundred to a few hundred dollars.
8. Will fixing the U1555 code related to the left rear seat switch communication problem in my Buick improve the overall performance and safety of the vehicle?
- Resolving communication errors between electronic components can prevent potential malfunctions in other vehicle systems, enhancing overall performance and safety.
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