P0740 - How to Clean Solenoid Screen Filters for Honda/Acura

Demonstrated on my 2002 Acura TL-S, this video will show you how to clean your transmission solenoid screen filters. If you have code P0740, or you're having problems with your transmission, such as slipping, slow shifting, failure to shift, random shifting, or aggressive shifting, please give this a try before you resort to spending thousands of dollars fixing or replacing your transmission. This is a relatively easy job and best of all, it's FREE to do!!! Please note that you do NOT need to drain your transmission fluid to clean these solenoids. You can take them both off without making a mess. The screens can be cleaned out using either compressed air or brake cleaner.

P0740 is a Check Engine Light (CEL) code resulting from Transmission Lock-Up Control System Fault. In short, this code is triggered by:
- Clogged Solenoid Screen filters (most common)
- Dirty transmission fluid (ATF)
- Low transmission fluid level
- Faulty Solenoid (watch the ohm test at the end of the video!)

My 2002 Acura TL-S with 209,000 miles on original engine and transmission was having all these problems after getting CEL code P0740, and now after cleaning these tiny filters, the check engine light is still off and the transmission is working like new!! Check below for updates on how my car is doing!

Miles drove after cleaning filters:
150 Miles - So far so good
500 Miles - still running strong!
1000+ miles - perfectly fine. We can easily say this was the problem and solution to my transmission problems!
9000+ miles - Currently at 218,000 miles. Need I say more?
Update: 10/20/20 - Encase anybody is curious, my car is currently at 309,000 miles and still running strong!!!

Replacement parts and fluid:
https://www.acurapartsforless.com/v-2002-acura-tl-sedan--type-s--5-speed-automatic/transmission-automatic--5at-sensor-solenoid
- Linear Solenoid Assembly (Top of transmission) - 28250-P6H-024
- Rubber Screen Filter O-Ring - 91301-PC9-003
- Screen Filter Pipe - 22750-P7Z-000
- Linear Solenoid Gasket - 28252-PAX-000
- Linear Solenoid Assembly (Front of Transmission, comes with gasket) - 28250-P7W-003
- Linear Solenoid Assembly Gasket ONLY - 28251-P7W-003
- Exterior Transmission Fluid Spin on filter - 25450-P7W-003
- Honda DW-1 Transmission fluid - https://amzn.to/3qq4Acn

ADDITIONAL POSSIBLE SOLUTIONS: ***The following part numbers and fluids are for my specific car. Please double-check online and in your car's manual for exact parts***

- Dirty transmission fluid will also cause transmission problems. Check how dirty your fluid is. Does it look nice and red? Or is it a really dark red, brown, or even black? If it is dirty, I would highly advise doing a 3-quart drain and fill ASAP. Make sure to use Honda ATF DW-1. If you didn't already know, this is the new and improved formula that replaces the old Z1. Don't use any aftermarket fluids, use Honda! I would recommend doing a 3-quart drain and fill once every 15,000 miles from now on. A case of 12 quarts is $89.00 on eBay from seller "livermorehonda." Buy it! I will make an instructional video on how to do this soon! So keep an eye out!

- If your ATF level is too high or too low, this can also cause problems. To check it:
1. Bring your vehicle up to full operating temperature. Letting your vehicle idle only warms up the engine, not the transmission. So warm up your vehicle by going on a short drive.
2. Park your car on a level surface, not on a hill or incline.
3. Turn off your car.
4. Check your ATF level via the dipstick and adjust the fluid level as necessary.

- Most people don't know or think about it, but our cars have an exterior transmission fluid filter. If this filter has never been changed or at least not for a while, this would be a good time to replace it while your car is apart and everything is easy to get to! The part number for my car is 25450-P7W-003. Costs about $43.07 plus shipping. This should be the same ATF filter for all TL's from 2000-2003, but please double-check on acurapartsforless.com.

- Lastly, the solenoids themselves can go bad. I have had people tell me getting new solenoids have fixed their transmission problems. This is why I put an Ohm test at the end of the video. Don't just ignore it! Also, if you plan on purchasing new solenoids, make sure to buy OEM Genuine Honda parts!

- Also, try entering your CEL code on autocodes.com for more information. This website can give you good information on the possible causes for getting this code, tech notes, when the code is detected, possible symptoms, and the description for your CEL code.

Acura TL-S Type S TL CL MDX Honda Accord Prelude Odyssey Pilot sedan coupe 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 97 98 99 00 01 02 03 04 05 06 07 2G 2nd Second Generation 3.2 3.2L transmission solution problem fix slip slipping shift shifting fail failure failing blown CEL check engine light code P0740 Torque Converter Clutch Solenoid TCC 28250-P6H-024 28250-P7W-003

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