U155D Chevrolet Code - Body Control Module Lost Communication With Right Rear Seat Heating/Venting/Cooling Switch On LIN Bus
Quick Answer
The U155D diagnostic trouble code for Chevrolet indicates that the Body Control Module (BCM) has lost communication with the Right Rear Seat Heating/Venting/Cooling Switch on the Local Interconnect Network (LIN) bus. Common causes include Faulty Right Rear Seat Heating/Venting/Cooling Switch, Wiring or connection issues between the BCM and the switch, BCM software or hardware malfunction. 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
- U155D Chevrolet indicates Body Control Module Lost Communication With Right Rear Seat Heating/Venting/Cooling Switch On LIN Bus.
- Common causes
- Common causes include Faulty Right Rear Seat Heating/Venting/Cooling Switch, Wiring or connection issues between the BCM and the switch, BCM software or hardware malfunction.
- 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.
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Code U155D Chevrolet Description
The U155D diagnostic trouble code for Chevrolet indicates that the Body Control Module (BCM) has lost communication with the Right Rear Seat Heating/Venting/Cooling Switch on the Local Interconnect Network (LIN) bus. The LIN bus is a communication network used in modern vehicles to allow various modules and components to communicate with each other. In this case, the BCM is unable to communicate with the switch located in the right rear seat that controls the heating, venting, and cooling functions.
Common Causes of U155D Chevrolet
- Faulty Right Rear Seat Heating/Venting/Cooling Switch.
- Wiring or connection issues between the BCM and the switch.
- BCM software or hardware malfunction.
- Electrical interference or noise affecting the LIN bus communication.
- Water or moisture damage affecting the switch or BCM.
Symptoms of U155D Chevrolet
- Inability to control the temperature settings for the right rear seat heating/cooling system.
- Malfunctioning or unresponsive right rear seat heating/cooling switch.
- Error message or warning light related to the BCM communication loss.
- Irregular operation of other systems controlled by the BCM.
How to Fix U155D Chevrolet
- Begin by conducting a thorough inspection of the Right Rear Seat Heating/Venting/Cooling Switch and its wiring connections.
- Check for any visible damage or corrosion on the switch and wiring harness.
- Test the switch for functionality using a multimeter or diagnostic tool.
- Inspect the BCM for any signs of damage or malfunction, and ensure all connections are secure.
- If necessary, replace the faulty switch or repair any damaged wiring connections. Reset the BCM and perform a system relearn procedure to establish communication.
Cost to Fix U155D Chevrolet
The typical repair costs for addressing the U155D code on a Chevrolet vehicle can vary depending on the specific cause of the issue. In general, the cost of replacing a faulty switch or repairing wiring connections can range from $100 to $300, including parts and labor. However, additional costs may apply if the BCM needs to be replaced or reprogrammed. It is recommended to consult with a qualified mechanic or dealership for an accurate cost estimate based on the specific diagnosis and repair requirements. Keep in mind that labor rates at auto repair shops can vary, so it's advisable to inquire about rates in your local area for a more precise estimate.
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Frequently Asked Questions about U155D Chevrolet Code
1. What are the common symptoms of OBDII code U155D in a Chevrolet related to the Body Control Module losing communication with the right rear seat heating/venting/cooling switch?
Symptoms may include non-functioning right rear seat heating, venting, or cooling features, as well as potential issues with other related components.
2. What are the possible causes of the U155D code in a Chevrolet, signaling a communication problem with the right rear seat switch on the LIN bus?
Causes may include a faulty body control module, damaged wiring or connections, a malfunctioning right rear seat switch, or issues with the LIN bus communication network.
3. How can I diagnose the U155D trouble code in my Chevrolet to pinpoint the source of the communication loss with the right rear seat switch?
Diagnosis typically involves using a professional OBDII scanner to retrieve and analyze the specific trouble codes, as well as conducting thorough inspections of the body control module, seat switch, and related wiring.
4. What are some repair tips for addressing the U155D code in a Chevrolet due to a loss of communication with the right rear seat switch?
Repair tips may include checking and repairing any damaged wiring, ensuring proper connections, resetting the body control module, or replacing the faulty seat switch if necessary.
5. Can I continue to drive my Chevrolet with the U155D code related to the right rear seat switch communication issue?
It is generally not recommended to ignore the U155D code, as it may indicate underlying issues that can affect the functionality of important features in your vehicle. It is advisable to address the problem promptly.
6. How much does it typically cost to repair the U155D code in a Chevrolet caused by communication loss with the right rear seat switch?
The cost of repair can vary depending on the root cause of the issue. It may range from a simple wiring repair to a more complex replacement of components like the body control module or the seat switch.
7. Is the U155D code in a Chevrolet related to the right rear seat switch a common issue among vehicle owners?
While not as common as some other OBDII codes, issues with communication loss between the body control module and the right rear seat switch can occur in Chevrolet vehicles, particularly in models with advanced comfort features.
8. Can a DIY enthusiast with basic automotive knowledge repair the U155D code in a Chevrolet without professional help?
Depending on the underlying cause, some DIY enthusiasts may be able to address the U155D code by checking and repairing wiring or connections. However, more complex issues may require professional diagnosis and repair.
9. Are there any recalls or technical service bulletins (TSBs) related to the U155D code in Chevrolet vehicles?
It is recommended to check with a Chevrolet dealership or online databases for any relevant recalls or TSBs related to the U155D trouble code and the communication issue with the right rear seat switch.
10. Will resetting the OBDII system clear the U155D trouble code in a Chevrolet, or is further action needed to resolve the communication problem with the right rear seat switch?
While resetting the OBDII system may temporarily clear the trouble code, it is crucial to address the root cause of the communication issue to prevent the code from reappearing. Proper diagnosis and repair are recommended.
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