P0894 Code: Transmission Component Slipping

Modern cars are equipped with on-board diagnostics (OBD) to make it easier for technicians to diagnose potential problems. While these codes are helpful to professionals, troubleshooting them may be confusing for the average DIYer.

If your car has a logged P0894, but you don’t know what it means, reading this short informative guide might help. Learn all about code P0894’s triggers and the issues that may persist if this code is left unresolved.

What Does the P0894 Code Mean?

Diagnostic trouble code (DTC) P0894 stands for “Transmission Component Slipping.” This code is logged when the powertrain control module (PCM) has received information from the input and output speed sensors that an internal transmission component is slipping. Depending on the manufacturer, this code could also mean that the PCM has perceived the torque converter to be slipping.

The PCM monitors the difference between engine speed and transmission output speed. In a specific drive range with the torque converter clutch (TCC) engaged, the engine speed should closely match the transmission output speed. Additionally, in a set drive range with the TCC engaged, the TCC slip speed should be within a certain threshold.

As with many other automatic transmission issues, a logged code may be a result of electrical or mechanical failure. When there’s an internal transmission problem, such as a lack of fluid pressure or a worn clutch pack, the transmission may not be able to achieve the desired gear ratio due to slippage. In such a scenario, transmission fluid may smell of burnt friction material.

If the PCM detects a degree of transmission slippage above the maximum allowable parameters, code P0894 may be stored. Trouble code P0894 may also be set when the PCM detects excessive TCC slip when the TCC should be engaged.

If you want more information on trouble codes like P0894 and the transmission system, read our technical discussion about OBD codes and gear ratios.

Note: The definition of code P0894 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Possible Causes of the P0894 Code?

P0894 is a generic code, so it can have many causes. Here are the most common:

• Low level of transmission fluid
• Defective control solenoid
• Failing torque converter
• Internal transmission issues
• Faulty input or output speed sensor
• PCM/TCM failure

What are the Common Symptoms of the P0894 Code?

You may notice the following symptoms if your car has a logged P0894 error code:

• Active check engine light
• Transmission slippage
• Car stuck in limp mode
• Transmission performance issues
• Poor fuel mileage
• Delayed gear engagement
• Strong burnt smell from the transmission fluid

How to Diagnose the P0894 Code

Prevent complications in your vehicle’s transmission by addressing engine code P0894 immediately. However, diagnosing this code can be difficult as it shares similar triggers and symptoms with other DTCs.

Before attempting a diagnosis, keep in mind that all vehicles are built differently. They may require varying diagnostic procedures depending on their manufacturer. For the appropriate steps, always consult your vehicle repair manual. If DIY auto repair is not for you, you can always seek the help of a mechanic.

How to Fix the P0894 Code

Code P0894 may be set in vehicles of varying makes and models. However, there is no universal solution for this trouble code. All cars are built differently and may require varying solutions. For instance, a solution that worked for a logged P0894 on a Chevy might not work on a Toyota with the same set code.

Always refer to the factory repair information specific to your vehicle before working on repairs. If you’re still unsure of which repair steps to follow, you can just bring your car to an auto shop and let a technician handle the repairs for you.

Products Mentioned in this Guide

Torque Converter Engine Control Module