U1847 Chevrolet Code - Drive Motor Control Module 1 Lost Communication With Battery Energy Control Module On Powertrain Expansion CAN Bus
Quick Answer
The U1847 code for Chevrolet vehicles indicates that there is a communication issue between the Drive Motor Control Module 1 (DMCM1) and the Battery Energy Control Module (BECM) on the Powertrain Expansion Controller Area Network (CAN) bus. Common causes include Faulty wiring or connectors between the DMCM1 and BECM, Malfunctioning Drive Motor Control Module 1 or Battery Energy Control Module, Software glitch in one of the modules. 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 Chevrolet indicates Drive Motor Control Module 1 Lost Communication With Battery Energy Control Module On Powertrain Expansion CAN Bus.
- Common causes
- Common causes include Faulty wiring or connectors between the DMCM1 and BECM, Malfunctioning Drive Motor Control Module 1 or Battery Energy Control Module, Software glitch in one of the modules.
- 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 U1847 Chevrolet Description
The U1847 code for Chevrolet vehicles indicates that there is a communication issue between the Drive Motor Control Module 1 (DMCM1) and the Battery Energy Control Module (BECM) on the Powertrain Expansion Controller Area Network (CAN) bus. The DMCM1 is responsible for controlling the electric drive motor in hybrid or electric vehicles, while the BECM manages the energy flow to and from the battery. When these modules are unable to communicate effectively, it can lead to performance issues and potentially affect the vehicle's drivability.
Common Causes of U1847 Chevrolet
- Faulty wiring or connectors between the DMCM1 and BECM
- Malfunctioning Drive Motor Control Module 1 or Battery Energy Control Module
- Software glitch in one of the modules
- Electrical interference or signal disruption on the CAN bus
- Water or moisture damage to the modules
Symptoms of U1847 Chevrolet
- Loss of power or acceleration
- Reduced fuel efficiency
- Vehicle not starting
- Warning lights illuminated on the dashboard
- Inconsistent or erratic behavior of the electric drive motor
How to Fix U1847 Chevrolet
- Conduct a thorough diagnostic scan to retrieve the U1847 code and identify the specific module or wiring issue causing the communication failure.
- Inspect the wiring harness and connectors between the DMCM1 and BECM for any signs of damage, corrosion, or loose connections. Repair or replace as necessary.
- Check the modules for proper functionality and update the software if needed. Replace any faulty modules that are causing the communication breakdown.
- Clear the code from the vehicle's system and perform a test drive to ensure that the communication between the DMCM1 and BECM has been restored.
- If the issue persists, further troubleshooting may be required to address any underlying electrical or signal interference problems on the CAN bus.
Cost to Fix U1847 Chevrolet
The typical repair costs for addressing a U1847 code on a Chevrolet vehicle can vary depending on the specific cause of the communication failure. In general, the cost of parts such as wiring harnesses, connectors, or modules can range from $200 to $800. Labor costs at auto repair shops typically range from $80 to $150 per hour, with the total repair bill potentially amounting to $300 to $1000 or more. It is advisable to consult with a professional mechanic to obtain a more accurate estimate based on the vehicle's make and model, as well as the extent of the repairs needed.
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Frequently Asked Questions about U1847 Chevrolet Code
1. What are common symptoms of OBDII code U1847 in a Chevrolet related to Drive Motor Control Module 1 Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus?
- Common symptoms may include loss of power, drivability issues, and the illumination of the check engine light.
2. What are the possible causes of OBDII code U1847 in a Chevrolet?
- Possible causes may include faulty wiring or connectors, a malfunctioning Drive Motor Control Module, issues with the Battery Energy Control Module, or problems with the Powertrain Expansion CAN Bus.
3. How can I diagnose and repair OBDII code U1847 in a Chevrolet?
- Diagnosis typically involves using a diagnostic scanner to retrieve the code, checking the wiring and connectors for any damage, and testing the Drive Motor Control Module and Battery Energy Control Module. Repair may involve repairing or replacing damaged wiring, connectors, or modules as needed.
4. Are there any common mistakes to avoid when addressing OBDII code U1847 in a Chevrolet?
- Common mistakes to avoid include overlooking simple wiring issues, replacing components without proper diagnosis, and neglecting to clear the code after repairs are made.
5. Can OBDII code U1847 in a Chevrolet be safely driven with?
- It is generally not recommended to drive with this code present, as it can cause drivability issues and potentially lead to further damage if left unaddressed.
6. Will resetting the check engine light make OBDII code U1847 in a Chevrolet go away?
- Simply resetting the check engine light will not resolve the underlying issue causing the code. It is important to diagnose and repair the root cause to successfully clear the code.
7. How much does it typically cost to repair OBDII code U1847 in a Chevrolet?
- The cost of repair can vary depending on the specific cause of the code, the extent of the issue, and labor rates. It is recommended to consult with a professional mechanic for an accurate estimate.
8. Is OBDII code U1847 specific to Chevrolet vehicles only?
- Yes, this particular code is specific to Chevrolet vehicles and relates to communication issues between the Drive Motor Control Module and Battery Energy Control Module on the Powertrain Expansion CAN Bus.
9. Can extreme weather conditions affect the occurrence of OBDII code U1847 in a Chevrolet?
- Extreme weather conditions may potentially exacerbate existing communication issues related to this code, so it is important to keep this in mind when diagnosing and repairing the problem.
10. How can I prevent OBDII code U1847 from occurring in my Chevrolet in the future?
- Regular maintenance, timely repairs of any related issues, and ensuring proper wiring connections can help prevent the recurrence of this code in your Chevrolet.
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