U1885 Code - Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module
Quick Answer
Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Hybrid/EV Powertrain Control Module, Hybrid/EV Powertrain Control Module harness is open or shorted, Hybrid/EV Powertrain 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
- U1885 indicates Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module.
- Common causes
- Common causes include Faulty Hybrid/EV Powertrain Control Module, Hybrid/EV Powertrain Control Module harness is open or shorted, Hybrid/EV Powertrain 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 U1885 Description
This diagnostic is used to check the loss of communication with Hybrid/EV Powertrain Control Module 1 on high-speed General Motor Local Area Network (GMLAN) bus. The Battery Energy Control Module supervises a periodic serial data message to check the communication status of the Hybrid/EV Powertrain Control Module 1. If this message is not received within 3 s, then this Diagnostic Trouble Code (DTC) is set.
What are the Possible Causes of the DTC U1885?
- Faulty Hybrid/EV Powertrain Control Module
- Hybrid/EV Powertrain Control Module harness is open or shorted
- Hybrid/EV Powertrain Control Module circuit poor electrical connection
- Faulty Battery Energy Control Module
How to Fix the DTC U1885?
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 U1885 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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Information for Specific Makes
- U1885 Buick — Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module
- U1885 Cadillac — Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module
- U1885 Chevrolet — Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module
- U1885 GMC — Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module
Frequently Asked Questions about U1885 Code
1. What are common symptoms of OBDII code U1885?
- Common symptoms include the hybrid/EV system not functioning properly, poor fuel efficiency, and the vehicle going into a reduced power mode.
2. What can cause the OBDII code U1885 to appear?
- The code U1885 can be triggered by a communication breakdown between the Battery Energy Control Module and the Hybrid/EV Powertrain Control Module.
3. How can I diagnose the issue related to code U1885?
- Diagnosing the issue involves checking the wiring connections between the modules, ensuring they are secure and free of damage. It may also require using a diagnostic scanner to communicate with the affected modules.
4. Can a weak battery cause code U1885 to be set?
- Yes, a weak or failing battery can cause communication issues between modules, leading to code U1885 being triggered.
5. What should I do if I encounter code U1885?
- It is recommended to have the vehicle diagnosed by a professional technician to determine the exact cause of the communication failure and perform any necessary repairs.
6. Are there any common repair tips for resolving code U1885?
- Common repair tips include checking and repairing any damaged wiring, ensuring proper connections, and resetting the fault codes after the repair is completed.
7. Is it safe to continue driving with code U1885 present?
- It is not recommended to continue driving with code U1885 active, as it can affect the performance and safety of the hybrid/EV system.
8. Can code U1885 be triggered by a software glitch?
- Yes, software glitches or issues with the control modules' programming can also lead to the communication error and trigger code U1885.
9. How long does it typically take to repair code U1885?
- The repair time for code U1885 can vary depending on the exact cause of the communication failure, but it may take a few hours to diagnose and fix the issue.
10. Can code U1885 be a recurring problem even after repair?
- If the underlying cause of the communication issue is not properly addressed during the repair, code U1885 may reoccur. Regular maintenance and thorough diagnostic checks can help prevent this.
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