AutoCodes – GMC – U1895 GMC

U1895 GMC Code - Electro-Hydraulic Power Steering Module Lost Communication With Powertrain 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 Powertrain Control Module (PCM), Powertrain Control Module harness is open or shorted, 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: U1895 GMC indicates Electro-Hydraulic Power Steering Module Lost Communication With Powertrain Control Module.
Common causes: Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module harness is open or shorted, 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.

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Code Popularity 446

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 U1895 GMC 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 U1895 GMC - Electro-Hydraulic Power Steering Module Lost Communication With Powertrain Control Module - AutoCodes.com — U1895 GMC Code - Electro-Hydraulic Power Steering Module Lost Communication With Powertrain Control Module

What does this mean?

What are the Possible Causes of the DTC U1895 GMC?

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

How to Fix the DTC U1895 GMC?

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 U1895 GMC 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 U1895 GMC Code

1. What does the OBDII code U1895 mean on a GMC vehicle?

U1895 indicates a communication failure between the Electro-Hydraulic Power Steering (EHPS) Module and the Powertrain Control Module (PCM).

2. What are the common symptoms of code U1895 in a GMC?

Symptoms may include loss of power steering assist, a warning light on the dashboard, intermittent steering issues, or reduced steering performance.

3. What causes the U1895 code to appear in a GMC?

Possible causes include faulty wiring or connectors, a malfunctioning EHPS module, a defective PCM, or network communication issues within the vehicle.

4. Can I still drive my GMC with a U1895 code?

While the vehicle may still be drivable, steering effort may increase significantly, especially at low speeds, which can compromise safety.

5. How do I fix the U1895 code on my GMC?

Start by inspecting the wiring and connectors between the EHPS module and PCM for damage or loose connections. If no issues are found, further diagnostics may require testing or replacing the EHPS module or PCM.

6. Does clearing the U1895 code solve the problem?

Clearing the code will reset the warning temporarily, but if the underlying issue is not resolved, the code and symptoms will likely return.

7. How much does it cost to repair a U1895 code on a GMC?

Repair costs can vary widely depending on the cause but may range from $100 for a wiring repair to over $1,000 if a module replacement is required.

8. Can a U1895 code be caused by a dead battery?

Yes, a weak or dead battery can cause communication errors like U1895. Ensure the battery and charging system are functioning properly before further diagnosis.

9. What tools are needed to diagnose a U1895 code?

Youâ€™ll need an advanced OBDII scan tool capable of reading manufacturer-specific codes and accessing module communication data.

10. Should I take my GMC to a professional for a U1895 code?

If basic checks and repairs donâ€™t resolve the issue, itâ€™s recommended to consult a professional technician with experience in diagnosing communication network problems.