U1817 2016 Chevrolet Silverado Code - Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion CAN Bus Malfunction
Quick Answer
Devices connected to the powertrain high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator Control Module 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
- U1817 2016 Chevrolet Silverado indicates Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion CAN Bus Malfunction.
- Common causes
- Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator Control Module 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 U1817 2016 Chevrolet Silverado Description
The Motor Control Module and the Hybrid Powertrain Control Module are all internal to the Starter/Generator Control Module. All circuits to the Hybrid Powertrain Control Module are also internal to the Starter/Generator Control Module.
Communication diagnostics for the serial data, including device power and ground as well as the wakeup circuits for the Motor Control Module and the Hybrid Powertrain Control Module are all diagnosed from external sources only to the Starter/Generator Control Module connector because any circuit fault condition within the Starter/Generator Control Module will cause a complete replacement.
The Diagnostic Trouble Code (DTC) will be set when a supervised periodic message that includes the transmitter device availability has not been received.
What are the Possible Causes of the DTC U1817 2016 Chevrolet Silverado?
- Faulty Starter/Generator Control Module
- Starter/Generator Control Module harness is open or shorted
- Starter/Generator Control Module circuit poor electrical connection
How to Fix the DTC U1817 2016 Chevrolet Silverado?
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 U1817 2016 Chevrolet Silverado 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 U1817 2016 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code U1817 on a 2016 Chevrolet Silverado?
- Common symptoms include the Check Engine light coming on, loss of communication with the hybrid powertrain control module, and potential drivability issues.
2. What does the U1817 code "Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion CAN Bus Malfunction" mean?
- This code indicates a communication problem between the vehicle's powertrain control module and the hybrid powertrain control module on the Powertrain Expansion CAN Bus.
3. What are some possible causes of the U1817 code on a 2016 Chevrolet Silverado?
- Possible causes include wiring issues, faulty connectors, a malfunctioning hybrid powertrain control module, or problems with the Powertrain Expansion CAN Bus.
4. How can I diagnose the U1817 code on my Chevrolet Silverado?
- Diagnosing this code typically involves inspecting the wiring and connectors, checking for loose connections, and using a diagnostic scanner to communicate with the control modules.
5. Is it safe to continue driving with the U1817 code present?
- It is not recommended to continue driving with the U1817 code active, as it may lead to drivability issues or potential damage to the vehicle's powertrain components.
6. Can I repair the U1817 code on my own?
- While some DIY enthusiasts may attempt to diagnose and repair this code, it is recommended to seek professional assistance due to the complexity of the hybrid powertrain system.
7. How much does it typically cost to repair the U1817 code on a 2016 Chevrolet Silverado?
- The cost of repairing the U1817 code can vary depending on the root cause of the issue, but it may involve labor costs for diagnosis and potential replacement of components.
8. Will resetting the trouble codes make the U1817 code disappear?
- Resetting the trouble codes may temporarily clear the Check Engine light, but if the underlying issue causing the U1817 code is not addressed, it is likely to reappear.
9. Can extreme weather conditions affect the occurrence of the U1817 code?
- Extreme weather conditions, especially temperature fluctuations, can potentially impact the electrical connections and components associated with the hybrid powertrain system, leading to the U1817 code.
10. How can I prevent the U1817 code from recurring in the future?
- Regular maintenance checks, ensuring proper wiring connections, and addressing any underlying electrical issues promptly can help prevent the U1817 code from recurring.
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