AutoCodes – Buick – U1898 Buick

U1898 Buick Code - Starter/Generator Control Module Lost Communication With Hybrid 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 Hybrid Control Module (HCM), Hybrid Control Module harness is open or shorted, Hybrid 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: U1898 Buick indicates Starter/Generator Control Module Lost Communication With Hybrid Control Module.
Common causes: Common causes include Faulty Hybrid Control Module (HCM), Hybrid Control Module harness is open or shorted, Hybrid 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.

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Code Popularity 456

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1898 Buick Description

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. Operating information and commands are exchanged among the modules. The Diagnostic Trouble Code (DTC) is reported on a class 2 link to the scan tool by Powertrain Control Module (PCM) even if they may be set by different modules. The DTC will set when a node alive message has not been received from an identified module within the last 5 seconds after establishing class 2 serial data communication, or a supervised high-speed GMLAN message has not been received.

OBDII Code U1898 Buick - Starter/Generator Control Module Lost Communication With Hybrid Control Module - AutoCodes.com — U1898 Buick Code - Starter/Generator Control Module Lost Communication With Hybrid Control Module

What does this mean?

What are the Possible Causes of the DTC U1898 Buick?

Faulty Hybrid Control Module (HCM)
Hybrid Control Module harness is open or shorted
Hybrid Control Module circuit poor electrical connection
Faulty Starter/Generator Control Module (SGCM)

How to Fix the DTC U1898 Buick?

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 U1898 Buick 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U1898 Buick Code

1. What are the common symptoms of OBDII code U1898 in a Buick related to the Starter/Generator Control Module losing communication with the Hybrid Control Module?

- Common symptoms may include issues with starting the vehicle, poor performance, and warning lights on the dashboard.

2. What are some possible causes of the U1898 code in a Buick?

- Possible causes include wiring issues, a faulty Starter/Generator Control Module, a malfunctioning Hybrid Control Module, or a communication network problem.

3. How can I diagnose the U1898 code in my Buick?

- Proper diagnosis typically involves using a diagnostic scanner to retrieve the trouble codes, checking the wiring and connections related to the modules, and performing communication tests.

4. Can I still drive my Buick if the U1898 code is present?

- It is not recommended to continue driving the vehicle with the U1898 code present, as it can affect the proper operation of essential components.

5. How can I repair the U1898 code in a Buick?

- Repairing the U1898 code may involve addressing any wiring issues, replacing the faulty control modules, reprogramming modules if necessary, or resetting the communication network.

6. Is it safe to reset the trouble codes related to the U1898 in a Buick?

- Resetting the trouble codes is generally safe after repairs have been made to address the underlying issue causing the code.

7. Will the U1898 code cause my Buick to fail an emissions test?

- Yes, the U1898 code can cause your Buick to fail an emissions test due to its impact on the vehicle's performance and emissions control systems.

8. How much does it typically cost to repair the U1898 code in a Buick?

- Repair costs can vary depending on the exact cause of the issue, but it may involve labor costs for diagnosis and repair, as well as the cost of any replacement parts.

9. Can a DIY enthusiast fix the U1898 code in a Buick?

- While some DIY enthusiasts may have the skills to diagnose and repair simple wiring issues, addressing more complex problems related to control modules may require professional expertise.

10. How can I prevent the U1898 code from appearing in my Buick in the future?

- Regular maintenance, timely repairs of any electrical issues, and addressing warning signs promptly can help prevent the recurrence of the U1898 trouble code.