P0894 OBD-II Trouble Code: Transmission Component Slipping

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Cost of diagnosing the P0894 code

P0894 is a diagnostic trouble code (DTC) for "Transmission Component Slipping". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
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Check Engine Light

P0894 code definition

The P0894 trouble code detects an issue with the vehicle’s automatic transmission component.

What the P0894 code means

The P0894 code is an OBD-II trouble code signaling a problem with the transmission component slipping. The powertrain control module (PCM) is responsible for altering the gear rations of the automatic transmission, as this helps control the vehicle’s speed, acceleration, fuel economy, and overall engine performance. When the ratio is one of the vehicle’s gears is not perceived to be consistent with the what the PCM is dictating, the P0894 trouble code will be detected.

What causes the P0894 code?

There are a number of different issues that can cause the P0894 code to be detected, including:

  • Mechanical failures within the internal transmission
  • Transmission fluid is low, empty, or contaminated
  • The internal transmission fluid passages are clogged or blocked
  • Malfunctioning shift solenoids
  • Faulty transmission control module (TCM)
  • Malfunctioning PCM

What are the symptoms of the P0894 code?

When the P0894 trouble code is detected, the vehicle’s Check Engine Light will usually illuminate on the instrument cluster. Most of the other symptoms are issues with the transmission, such as an inability to switch into or out of a certain gear, an overheating transmission, transmission slippage, and rough shifting. The vehicle may also experience a notable decrease in fuel efficiency.

While all of these symptoms are relatively common with the P0894 code, it is also common for no noticeable symptoms to occur when the code is first detected.

How does a mechanic diagnose the P0894 code?

The P0894 code should be diagnosed with a standard OBD-II trouble code scanner. A trained technician will examine the freeze frame data from the scanner, which will allow them to gain insight into the P0894 code, and see if any other trouble codes are present. The codes should then be reset, and the vehicle restarted and taken for a test drive. If the codes do not return, the issue was likely triggered erroneously, or as an intermittent error.

If the P0894 code remains after resetting and restarting, the mechanic will begin by assessing the transmission fluid. If the fluid is low, it will be replenished, and if it is dirty it will be emptied, flushed, and refilled.

If the code is still not resolved, the technician will assess the internal transmission, and look for issues such as damaged wires, faulty connectors, and damaged harnesses. Any issues in the internal transmission should be replaced.

If the issue does not lie with the transmission fluid or a mechanical issue in the internal transmission, then the technician can look for other potential problems, such as with the shift solenoids or the control modules.

Whenever a component is repaired or replaced, the mechanic should reset the trouble codes and restart the vehicle, to see if the issue has been resolved.

Common mistakes when diagnosing the P0894 code

The most common mistake when diagnosing the P0894 code comes from a failure to follow the standard OBD-II trouble code diagnosis protocol. The protocol for assessing a trouble code should be followed at all times. Failure to do so often results in replacing fully functioning shift solenoids, when wires, connectors, or harnesses (more affordable fixes) were the actual problem.

How serious is the P0894 code?

The P0894 trouble code usually doesn’t keep a car from being able to drive. However, the issue causing the code may be causing damage to the transmission. Failure to have the P0894 code addressed can result in severe damage to the transmission, and the system may need a rebuild.

What repairs can fix the P0894 code?

Some of the repairs for the P0894 trouble code include:

Additional comments for consideration regarding the P0894 code

The P0894 code only exists in vehicles with automatic transmissions. It is common for other gear ratio trouble codes to be present when the P0894 code is detected. If the PCM needs to be replaced, it will also need to be reprogrammed.

Need help with a P0894 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

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Pete

13 years of experience
174 reviews
Pete
13 years of experience
Tried this service for the first time. My problem - sometimes my auto's engine would race, the tachometer would be very high but my car would start slowing down, as if it had lost power, but after a short time the normal power and speed would be working right again. Very scary when you are driving on the highway at 70 mph. then this happens, and you seem to be coasting down to 30 mph. before your car starts to engage properly again. Pete Hambly to the rescue. I explained to Pete how my car was acting, and he surmised what the problem was very quickly before he even hooked up the code reader to my auto. After reading the code and doing a few tests with his instruments to verify his prognosis, he solved the problem. He looked at my part and found a faulty connector sensor. He temporally fixed the problem until the part I need is found. Pete was friendly, informative, professional, very knowledgeable, courteous, and proficient. He was clean cut, well mannered, and made you feel at ease. Pete gave me the impression he loved his work and it was more than just a job to be done. I am very happy I used "Your Mechanic" services and got Pete as my service technician. My cost was lower than if I had taken it somewhere else and more personable. Communicating directly with my technician instead of a clerk behind a desk, that writes up a work order for the mechanic to read, solved my problem faster and with more precision. I will definitely use Your Mechanics services in the future and definitely ask for Pete again. Thank You very much Pete for a pleasant stressless hour.
2001 MITSUBISHI GALANT - CHECK ENGINE LIGHT IS ON - SAN DIEGO, CALIFORNIA

Peter

40 years of experience
1059 reviews
Peter
40 years of experience
great service Peter!!
2007 BMW 328I - CHECK ENGINE LIGHT IS ON - PHOENIX, ARIZONA

Clifton

27 years of experience
189 reviews
Clifton
27 years of experience
Arrived on time and started the job ASAP. Delightful to work with. Went out of his way to satisfy all my concerns with my car.
2002 AUDI A4 QUATTRO - CHECK ENGINE LIGHT IS ON - BOCA RATON, FLORIDA

Joseph

15 years of experience
115 reviews
Joseph
15 years of experience
Friendly, knowledgeable, prompt, good pricing. Will use him again.
2002 JEEP GRAND CHEROKEE - CHECK ENGINE LIGHT IS ON - PARKVILLE, MARYLAND

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