AutoCodes – GMC – P0894 GMC

P0894 GMC Code - Transmission Component Slipping

Quick Answer

When the Engine Control Module (ECM) requests the neutral locked turbine feature, the Transmission Control Module (TCM) commands the 3rd, 5th, and reverse clutch and the 2-6 clutch to apply, which locks the turbine shaft. Common causes include Low transmission fluid level, Dirty or contaminated fluid, Internal transmission failure. 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: P0894 GMC indicates Transmission Component Slipping.
Common causes: Common causes include Low transmission fluid level, Dirty or contaminated fluid, Internal transmission failure.
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 21,867

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 Aug 04, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
Comments
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Code P0894 GMC Description

When the Engine Control Module (ECM) requests the neutral locked turbine feature, the Transmission Control Module (TCM) commands the 3rd, 5th, and reverse clutch and the 2-6 clutch to apply, which locks the turbine shaft. This provides a load to the engine and reduces the engine warm-up time. The Diagnostic Trouble Code (DTC) will be set when the TCM detects turbine speed greater than 50 RPM for 3 s. This condition must occur 3 times.

OBDII Code P0894 GMC - Transmission Component Slipping - AutoCodes.com — P0894 GMC Code - Transmission Component Slipping

What does this mean?

What are the Possible Causes of the DTC P0894 GMC?

Low transmission fluid level
Dirty or contaminated fluid
Internal transmission failure
Faulty Transmission Control Moduleâ€‰(TCM)
Transmission Control Module harness is open or shorted
Transmission Control Module circuit poor electrical connection

How to Fix the DTC P0894 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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0894 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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Information for Specific GMC Models

P0894 2014 GMC Sierra — Transmission Component Slipping
P0894 2015 GMC Sierra — Transmission Component Slipping
P0894 2016 GMC Sierra — Transmission Component Slipping
P0894 2017 GMC Sierra — Transmission Component Slipping
P0894 2018 GMC Sierra — Transmission Component Slipping

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.