U1555 Cadillac 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 Cadillac 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 Cadillac Description
What are the Possible Causes of the DTC U1555 Cadillac?
- 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 Cadillac?
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 Cadillac 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 Cadillac Code
1. What are the common symptoms of OBDII code U1555 in a Cadillac related to the Body Control Module losing communication with the left rear seat heating/venting/cooling switch?
The common symptoms include malfunctioning left rear seat heating/cooling system, inoperative seat ventilation, and issues with the seat control switch.
2. What are the potential causes of OBDII code U1555 in a Cadillac?
The code U1555 is typically triggered by a faulty left rear seat heating/cooling switch, damaged wiring or connectors in the LIN bus communication system, or a malfunctioning Body Control Module.
3. How can I diagnose the issue related to OBDII code U1555 in a Cadillac?
Diagnosing the issue involves checking the wiring and connectors for any damage, testing the left rear seat heating/cooling switch for functionality, and using a diagnostic scan tool to communicate with the Body Control Module.
4. Can I repair OBDII code U1555 in a Cadillac by myself?
If you have experience working on automotive electrical systems, you may be able to repair the issue yourself by identifying and fixing any damaged wiring or connectors, replacing the faulty switch, or reprogramming the Body Control Module if necessary.
5. Is it safe to drive my Cadillac with OBDII code U1555 present?
While the vehicle may still be operational with this code, it is recommended to address the issue promptly to avoid any potential safety hazards or further damage to the electrical system.
6. Are there any temporary fixes for OBDII code U1555 in a Cadillac?
Temporary fixes such as resetting the code using a diagnostic scanner or disconnecting and reconnecting the battery may sometimes clear the code temporarily, but it is crucial to address the root cause of the problem for a permanent solution.
7. Can weather conditions affect the occurrence of OBDII code U1555 in a Cadillac?
Extreme temperatures or moisture can sometimes exacerbate issues with the LIN bus communication system, potentially leading to the Body Control Module losing communication with the left rear seat heating/cooling switch.
8. How much does it typically cost to repair OBDII code U1555 in a Cadillac?
The cost of repair can vary depending on the exact cause of the issue, but it may involve expenses for parts replacement, wiring repairs, or diagnostic services from a qualified mechanic or dealership.
9. Will OBDII code U1555 cause any other electrical problems in my Cadillac?
While the code specifically relates to the communication issue with the left rear seat heating/cooling switch, it is essential to address it promptly to prevent any potential cascading effects on other electrical components in the vehicle.
10. How long does it usually take to repair OBDII code U1555 in a Cadillac?
The repair time can vary based on the complexity of the issue and the availability of parts, but it is advisable to consult with a professional technician to get an accurate estimate of the repair duration.
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