Engine-Codes - Gmc - P0894 GMC

P0894 GMC - Torque Converter Clutch Fluid Diagram

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0894 GMC Possible Causes

  • Low transmission fluid level
  • Dirty or contaminated fluid
  • Internal transmission failure

How is the P0894 GMC code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the P0894 GMC code

Labor: 1.0

The cost to diagnose the P0894 GMC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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When is the code detected?

When the Powertrain Control Module (PCM) detects excessive Torque Converter Clutch (TCC) slip when the TCC should be engage, then the trouble code P0894 is set.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0894 GMC Meaning

The Powertrain Control Module (PCM) monitors the difference between engine speed and transmission output speed. In D3 drive range with Torque Converter Clutch (TCC) engaged, the engine speed should closely match the transmission output speed. In D4 drive range, with the TCC engaged, the TCC slip speed should be -20 to +50 RPM.

More Information

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