U1847 GMC Code - Drive Motor Control Module 1 Lost Communication With Battery Energy Control Module On Powertrain Expansion CAN Bus
Quick Answer
The Drive Motor Control Modules and the Hybrid/EV Powertrain Control Module 1 are all internal to the Power Inverter Module. Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy 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
- U1847 GMC indicates Drive Motor Control Module 1 Lost Communication With Battery Energy Control Module On Powertrain Expansion CAN Bus.
- Common causes
- Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy 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 U1847 GMC Description
Communication diagnostics for the serial data, including device power and ground as well as the wakeup circuits for Drive Motor Control Modules and the Hybrid/EV Powertrain Control Module 1 are all diagnosed from external sources only to the Power Inverter Module connector because any circuit fault condition within the Power Inverter Module will cause a complete replacement.
The Diagnostic Trouble Code (DTC) will set when a supervised periodic message that includes the transmitter device availability has not been received.
What are the Possible Causes of the DTC U1847 GMC?
- Faulty Battery Energy Control Module
- Battery Energy Control Module harness is open or shorted
- Battery Energy Control Module circuit poor electrical connection
How to Fix the DTC U1847 GMC?
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 U1847 GMC 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 U1847 GMC Code
1. What are the common symptoms of OBDII code U1847 in a GMC vehicle?
- Common symptoms include the check engine light illuminating, loss of power, poor fuel efficiency, and difficulty starting the vehicle.
2. What does the OBDII code U1847 for GMC mean?
- This code indicates that the Drive Motor Control Module 1 has lost communication with the Battery Energy Control Module on the Powertrain Expansion CAN Bus.
3. What are possible causes of OBDII code U1847 in a GMC vehicle?
- Possible causes include damaged wiring or connectors, a faulty Battery Energy Control Module, a malfunctioning Drive Motor Control Module 1, or issues with the CAN Bus communication network.
4. How can I diagnose OBDII code U1847 in my GMC vehicle?
- Diagnosing this code typically involves using a diagnostic scanner to retrieve the specific trouble code, checking the wiring and connectors for damage, and testing the Battery Energy Control Module and Drive Motor Control Module 1 for proper functionality.
5. Can I still drive my GMC vehicle with OBDII code U1847?
- It is not recommended to drive the vehicle with this code present, as it can lead to performance issues and potential safety concerns. It's best to address the underlying problem as soon as possible.
6. How can I repair OBDII code U1847 in my GMC vehicle?
- Repairing this code may involve repairing or replacing damaged wiring or connectors, replacing the Battery Energy Control Module or Drive Motor Control Module 1 if necessary, and ensuring proper communication on the CAN Bus network.
7. Will resetting the trouble codes make OBDII code U1847 go away?
- Resetting the trouble codes may temporarily clear the check engine light, but if the underlying issue causing code U1847 is not addressed, the code is likely to reappear.
8. Is it possible to prevent OBDII code U1847 from occurring in my GMC vehicle?
- While some causes of this code may be unavoidable, regular vehicle maintenance, such as checking and maintaining wiring integrity and ensuring proper module functionality, can help prevent this code from occurring.
9. Can a DIY enthusiast repair OBDII code U1847 in a GMC vehicle?
- Depending on the cause of the code, some DIY enthusiasts with the necessary tools and knowledge may be able to address the issue themselves. However, complex electrical or module-related problems may require professional assistance.
10. How much does it typically cost to fix OBDII code U1847 in a GMC vehicle?
- The cost of fixing this code can vary depending on the specific cause and the extent of the repairs needed. Costs may include parts replacement, labor fees, and diagnostic charges, so it's advisable to get a professional assessment for an accurate estimate.
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