AutoCodes – Generic – U1881

U1881 Code - Electro-Hydraulic Power Steering 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: U1881 indicates Electro-Hydraulic Power Steering 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.

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Code Popularity 853

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 U1881 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 U1881 - Electro-Hydraulic Power Steering Module Lost Communication With Energy Storage Control Module - AutoCodes.com — U1881 Code - Electro-Hydraulic Power Steering Module Lost Communication With Energy Storage Control Module

What does this mean?

What are the Possible Causes of the DTC U1881?

Faulty Energy Storage Control Module (ESCM)
Energy Storage Control Module harness is open or shorted
Energy Storage Control Module circuit poor electrical connection
Faulty Electro-Hydraulic Power Steering (EHPS) Module

How to Fix the DTC U1881?

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 U1881 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.

Need more information about the U1881 code?

Need more information on how to fix the U1881 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1881 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U1881 Buick — Electro-Hydraulic Power Steering Module Lost Communication With Energy Storage Control Module
U1881 Cadillac — Electro-Hydraulic Power Steering Module Lost Communication With Energy Storage Control Module
U1881 Chevrolet — Electro-Hydraulic Power Steering Module Lost Communication With Energy Storage Control Module
U1881 GMC — Electro-Hydraulic Power Steering Module Lost Communication With Energy Storage Control Module

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 U1881 Code

What does the OBDII code U1881 mean?

U1881 indicates a communication loss between the Electro-Hydraulic Power Steering Module and the Energy Storage Control Module, which can affect steering performance.

What are the common symptoms of U1881?

Common symptoms include a warning light on the dashboard, difficulty steering, or a loss of power steering assistance.

What could cause the U1881 code to trigger?

Causes may include faulty wiring, a malfunctioning Electro-Hydraulic Power Steering Module, a defective Energy Storage Control Module, or issues with the vehicle's electrical system.

How can I diagnose the U1881 code?

To diagnose U1881, use an OBD-II scanner to confirm the code, check for related codes, inspect wiring and connectors, and test the modules for proper function.

What are some common repair tips for fixing U1881?

Common repairs include checking and repairing wiring and connectors, replacing the Electro-Hydraulic Power Steering Module or Energy Storage Control Module, and ensuring the vehicle's battery and charging system are functioning correctly.

Can I drive my vehicle with the U1881 code?

While you may still be able to drive, it is not recommended due to potential steering issues that could compromise safety. It's best to have it addressed promptly.

Is U1881 a serious code?

Yes, U1881 can be serious as it affects steering control, which is crucial for safe vehicle operation. Immediate attention is advised.

What tools do I need to troubleshoot U1881?

Essential tools include an OBD-II scanner, a multimeter for electrical testing, and basic hand tools for inspections and repairs.

Could a dead battery trigger the U1881 code?

Yes, a dead or weak battery can cause communication issues between modules, potentially triggering the U1881 code. Checking the battery condition is a good first step in troubleshooting.