U1817 Chevrolet 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 Chevrolet 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 Chevrolet 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 Chevrolet?
- 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 Chevrolet?
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 Chevrolet 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.
Need more information about the U1817 Chevrolet code?
Need more information on how to fix the U1817 Chevrolet code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U1817 Chevrolet code diagnosed by a professional: Find a repair shop in your area
Information for Specific Chevrolet Models
- U1817 2014 Chevrolet Silverado — Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion CAN Bus Malfunction
- U1817 2015 Chevrolet Silverado — Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion CAN Bus Malfunction
- U1817 2016 Chevrolet Silverado — Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion CAN Bus Malfunction
- U1817 2017 Chevrolet Silverado — Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion CAN Bus Malfunction
- U1817 2018 Chevrolet Silverado — Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion CAN Bus Malfunction
Frequently Asked Questions about U1817 Chevrolet Code
1. What are the common symptoms of OBDII code U1817 in a Chevrolet related to the Powertrain Expansion CAN Bus malfunction?
- Common symptoms include the hybrid powertrain system not functioning properly, loss of communication with the powertrain control module, and potential drivability issues.
2. What are the potential causes of the U1817 code in a Chevrolet indicating Lost Communication with the Hybrid Powertrain Control Module?
- Possible causes may include faulty wiring or connections in the CAN bus network, a malfunctioning hybrid powertrain control module, or issues with the powertrain expansion CAN bus communication.
3. How can I diagnose the U1817 code in a Chevrolet related to the Hybrid Powertrain Control Module communication issue?
- Diagnosis typically involves using a diagnostic scanner to retrieve the trouble codes, checking the wiring and connections in the CAN bus system, and testing the hybrid powertrain control module for proper functionality.
4. What are some repair tips for addressing the U1817 code in a Chevrolet with a Powertrain Expansion CAN Bus malfunction?
- Repair tips may include repairing any damaged wiring or connectors in the CAN bus network, replacing a faulty hybrid powertrain control module, and ensuring all components are properly connected and communicating.
5. Is it safe to continue driving my Chevrolet with the U1817 code indicating Lost Communication with the Hybrid Powertrain Control Module?
- It is not recommended to continue driving the vehicle with this code present, as it can lead to potential drivability issues and further damage to the hybrid powertrain system. Seek professional diagnosis and repair promptly.
6. Can a DIY enthusiast fix the U1817 code related to the Powertrain Expansion CAN Bus malfunction in a Chevrolet?
- While some basic troubleshooting like checking connections can be done by enthusiasts, diagnosing and repairing issues with the hybrid powertrain control module and CAN bus system may require specialized knowledge and tools best handled by a professional.
7. How much does it typically cost to repair the U1817 code in a Chevrolet with a Hybrid Powertrain Control Module communication problem?
- Repair costs can vary depending on the exact cause of the issue, but expect to pay for diagnostic time, potential parts replacement, and labor. Costs can range from a few hundred to over a thousand dollars.
8. Can resetting the trouble codes using a scanner fix the U1817 code temporarily in a Chevrolet?
- Resetting the trouble codes may temporarily clear the warning light, but if the underlying issue causing the U1817 code is not addressed, the problem is likely to reoccur. It's important to diagnose and fix the root cause.
9. Are there any recalls or technical service bulletins related to the U1817 code in Chevrolet vehicles?
- It's recommended to check with a Chevrolet dealership or online resources for any recalls or technical service bulletins related to the U1817 code in your specific vehicle model to see if there are any known issues or solutions.
10. How can I prevent the U1817 code from occurring again in my Chevrolet after it has been repaired?
- To prevent the U1817 code from reoccurring, ensure regular maintenance of the hybrid powertrain system, address any wiring or connection issues promptly, and follow manufacturer recommendations for proper vehicle care and operation.
Discuss the causes and fixes for U1817 Chevrolet OBDII Code
Code U1817 Chevrolet comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
