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If you're driving and suddenly your car starts to shake, or the Check Engine Light comes on, you may have a transmission problem. One error code that may show up in your OBD scanner is P0894. What does this code mean? What are the symptoms and causes?
Read on as this guide will answer all of these questions and more. By the end of this article, you will learn how to fix the code P0894.
What is Code P0894?
The P0894 is an OBD-II trouble code that indicates a problem with the transmission slipping out of gear. The transmission should be able to transition between gears without any issues smoothly. If the transmission is slipping, the Powertrain Control Module (PCM) will send the code P0894 to your OBD scanner.
Symptoms of Code P0894
As we all know, the transmission makes our cars move, so when code P0894 is shown in the OBD scanner, it will surely affect how your vehicle drives. The main symptom you will notice is the Check Engine Light illuminating. Other symptoms may include:
- Revving without an increase in speed.
- Rough shifting
- Transmission may slip out of gear while driving
- Overheating of transmission
Causes of Code P0894
When you experience those signs mentioned above, you may think that the transmission is just about to go out. But, other causes may trigger this code to be set, such as:
- Damaged wiring
- Bad PCM
- Low transmission fluid level
- Faulty shift solenoids
- Clogged transmission filter
- Internal transmission failure
How to Diagnose Error Code P0894?
With all the symptoms and causes of this code presented, we can now proceed to diagnosing and possibly solving this problem. Now, make sure to read all the information above as they are crucial. Knowing all these may save you time and effort when diagnosing the problem yourself. Here’s what to do:
Check for Other Trouble Codes
Scanning for other trouble codes is the first thing you must do. This is important as the P0894 code may be caused by another problem. If you retrieved other transmission codes, don't forget to write them down. If there are no other codes, then proceed to the next step.
Perform Visual Inspection on Transmission Fluid Level
Next, you should check the transmission fluid level. This essential step will determine if the fluid level is correct. If it is low, add more fluid, as this can cause the P0894 code to trigger and see if it clears up. If it does not, then check for any leaks.
Inspect for Transmission Fluid Leaks
If you have checked for other codes and ensured that the transmission fluid level is correct, the next step is to check for transmission leaks. A transmission leak can cause the fluid level to drop and trigger this code. If you find a transmission leak, repair it and see if the code clears. If the code does not clear up, check for any clogs in the filter.
Check for Clogged Transmission Filter
A clogged transmission filter can cause the code P0894 to be triggered. If the filter is clogged, clean or replace it and see if it clears the error code. If it does not, then proceed to check for any wiring issues.
Check for Wiring Problems
If you have checked for other codes and made sure the transmission fluid is correct and its filter is not clogged, you should check for any wiring problems. Inspect for damaged wires, corroded or faulty connectors, and frayed harnesses. If the code still does not clear up, let's check for a faulty pressure sensor.
Check for a Faulty Transmission Pressure Sensor
A faulty transmission pressure sensor can cause the code P0894 to be triggered. If you find a defective pressure sensor, replace it and see if the code clears.
The question is, do you know how to replace the transmission pressure sensor? We assume you do, but, just in case, you may follow the instructions below.
How to Fix Code P0894?
Replacing the transmission pressure sensor is a relatively straightforward process, but you need basic mechanical skills. If you are not comfortable doing this, you can send your car to a mechanic but if you think you can do it yourself, then follow these steps:
Step-by-Step Guide to Replacing the Transmission Pressure Sensor
- Before you begin, make sure that the vehicle is parked on a level surface and that you have engaged the parking brake.
- Locate the transmission pressure sensor. It is often located on the transmission side, near the front.
- Disconnect the electrical connector from the sensor.
- Remove the bolts that hold the sensor in place and remove it from the transmission.
- Install the new sensor in the reverse order of removal.
- Reconnect the electrical connector to the new sensor.
- Start the engine and see if the P0894 code is gone.
Common Mistakes When Diagnosing the Code P0894
Every diagnosis is subject to different errors, and the code P0894 is no exception. However, you may avoid it with the help of this guide. The most common mistakes you should avoid are:
- Replacing parts without checking first if they are damaged or not
- Not clearing the transmission codes after repairing it
- Not verifying that the problem is indeed with the transmission pressure sensor
- Assuming that a defective sensor causes the problem without performing any diagnostic tests
- Not checking for other potential causes
Code P0894 FAQs
1. Is the code P0894 serious?
The code P0894 is serious because it can cause your car to stall or lose power while driving.
2. Can I still drive with this code?
Although this error code won't stop your car from operating, it might cause your car transmission to be damaged. So it is best to address it as soon as possible to prevent any further damage.
3. Can I use a typical scanner to diagnose the code P0894?
4. Can I prevent this error code from coming back?
You can do many things to prevent the code P0894 from coming back. These includes:
- Check your transmission fluid level and quality.
- Inspect the transmission filter and change it if necessary.
- Have your transmission system serviced by a professional mechanic.
- Have your car maintenance regularly
5. How much does the code P0894 repair cost?
Most auto repair shops will charge around $200 for this repair. However, the cost may vary depending on your location and the severity of the problem.
In conclusion, the code P0894 is an error code that is fixable even by yourself. Although it won’t stop your car from functioning, we still urge you to address it as soon as you can to avoid more severe transmission problems in the future.Did this guide help you clear the P0894 code? We truly hope it did and would love to hear about your experience. Please leave a comment below. Thanks for reading!