U1897 Cadillac Code - Starter/Generator Control Module Lost Communication With Energy Storage 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 Energy Storage Control Module (ESCM), Energy Storage Control Module harness is open or shorted, Energy Storage 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
- U1897 Cadillac indicates Starter/Generator Control Module Lost Communication With Energy Storage Control Module.
- Common causes
- Common causes include Faulty Energy Storage Control Module (ESCM), Energy Storage Control Module harness is open or shorted, Energy Storage 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 U1897 Cadillac Description
What are the Possible Causes of the DTC U1897 Cadillac?
- Faulty Energy Storage Control Module (ESCM)
- Energy Storage Control Module harness is open or shorted
- Energy Storage Control Module circuit poor electrical connection
- Faulty Starter/Generator Control Module (SGCM)
How to Fix the DTC U1897 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 U1897 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 U1897 Cadillac Code
1. What does the OBDII code U1897 mean on a Cadillac?
The code U1897 means the Starter/Generator Control Module (SGCM) has lost communication with the Energy Storage Control Module (ESCM), indicating a potential issue in the communication network.
2. What are the symptoms of the U1897 code on a Cadillac?
Symptoms may include a check engine light, reduced hybrid or electric system performance, difficulty starting the vehicle, or a loss of regenerative braking.
3. What causes the U1897 code to appear on a Cadillac?
Common causes include a faulty SGCM or ESCM, damaged wiring or connectors in the communication circuit, or issues with the CAN bus network.
4. How do you diagnose the U1897 code on a Cadillac?
Diagnosis involves checking for other related codes, inspecting wiring and connectors between the SGCM and ESCM, and testing the modules for proper communication using a scan tool.
5. Can a faulty battery cause the U1897 code on a Cadillac?
Yes, a weak or failing high-voltage battery can disrupt communication between the SGCM and ESCM, triggering the U1897 code.
6. Is the U1897 code serious, and can I drive with it?
The U1897 code can impact the hybrid or electric system's functionality, so driving with it may lead to reduced performance or further damage. It’s best to address it promptly.
7. How is the U1897 code fixed on a Cadillac?
Repairs typically involve replacing damaged wiring, repairing or replacing faulty connectors, updating module software, or replacing the faulty SGCM or ESCM.
8. Can resetting the code fix the U1897 issue on a Cadillac?
Resetting the code may temporarily clear the warning, but the underlying issue must be resolved to prevent the code from returning.
9. What tools are needed to troubleshoot the U1897 code on a Cadillac?
You’ll need an OBDII scan tool with CAN bus diagnostic capabilities, a multimeter for testing circuits, and possibly a wiring diagram for the vehicle.
10. Does the U1897 code affect fuel efficiency in a Cadillac?
Yes, if the hybrid or electric system is compromised due to the U1897 code, it may reduce fuel efficiency by relying more on the internal combustion engine.
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