U1887 Cadillac Code - Energy Storage Control Module Lost Communication With Starter/Generator Control Module
Quick Answer
Modules connected to the class 2 and 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 (SGCM), 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
- U1887 Cadillac indicates Energy Storage Control Module Lost Communication With Starter/Generator Control Module.
- Common causes
- Common causes include Faulty Starter/Generator Control Module (SGCM), 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 U1887 Cadillac Description
What are the Possible Causes of the DTC U1887 Cadillac?
- Faulty Starter/Generator Control Module (SGCM)
- Starter/Generator Control Module harness is open or shorted
- Starter/Generator Control Module circuit poor electrical connection
- Faulty Energy Storage Control Module (ESCM)
How to Fix the DTC U1887 Cadillac?
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 U1887 Cadillac 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 U1887 Cadillac Code
1. What are the common symptoms of OBDII code U1887 in a Cadillac?
- Common symptoms include issues starting the vehicle, poor acceleration, reduced fuel efficiency, and potentially the illumination of the check engine light.
2. What could be causing the Energy Storage Control Module to lose communication with the Starter/Generator Control Module?
- Possible causes include wiring issues, a faulty control module, software malfunctions, or a weak battery.
3. How can I diagnose the source of the communication loss between the modules?
- A thorough inspection of the wiring connections, checking for any visible damage, testing the battery health, and using a diagnostic scanner to read stored codes and live data can help pinpoint the issue.
4. Is it safe to continue driving my Cadillac with the U1887 code present?
- It is not recommended to drive the vehicle with this code present, as it can lead to further damage and potential safety hazards. It's best to address the issue promptly.
5. Can I repair the communication loss issue between the modules on my own?
- While some basic checks like inspecting wiring connections can be done by DIY enthusiasts, diagnosing and repairing the root cause of the communication loss may require advanced diagnostic tools and expertise best handled by a professional mechanic.
6. How much does it typically cost to repair the U1887 code in a Cadillac?
- The cost of repair can vary depending on the underlying issue. It could range from a simple wiring repair to replacing a control module, potentially costing anywhere from $100 to $1000 or more.
7. What are some preventive maintenance tips to avoid encountering the U1887 code in the future?
- Regularly checking the battery health, ensuring proper wiring connections, and keeping up with recommended maintenance schedules can help prevent communication issues between modules.
8. Will resetting the OBDII code U1887 make it go away permanently?
- Simply resetting the code without addressing the underlying issue will not make it go away permanently. The root cause of the communication loss must be identified and resolved for a lasting fix.
9. Can a weak battery cause the U1887 code to appear in a Cadillac?
- Yes, a weak or failing battery can lead to voltage fluctuations that may disrupt communication between control modules, triggering the U1887 code.
10. How long does it typically take to repair the U1887 code issue?
- The repair time can vary based on the specific cause of the communication loss. Simple fixes like reconnecting a loose wire may take a short time, while more complex issues could require several hours or more for diagnosis and repair.
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