1997 transmission sensors

Sep 19, 2006 9 Replies
S

my check engine light came on every other month and auto zone told me it was the transmission sensor creating the error code.



It only lasted one day, and all was fine.



Now, upon emission testing date here in TN, I failed the test.



The check engine light went off, luckily, and I passed emissions testing, and got my tags.



Now, instead of being on once every other month for a day, the check engine light is on for 25 days out of 30.



I've replaced oxygen sensors myself before on my Buick LeSabre, is it possible to replace my transmission sensors on my jeep?



I've noticed that when the light is on, the transmission does not know when to change into overdrive.



I have BOTH sensors giving an error message now on the transmission.



Can anyone point me towards the locations of the sensors?



Thanks in advance for any and all help.



Steve



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J

Steve,

What are you driving? We can only assume it's a Jeep but really need a bit more info!

Jeff DeWitt

snipped-for-privacy@gmail.com wrote:

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C

Just a guess.. but 97 grand cherokee 5.2L v8 automatic np242.

Carl

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J

Carl, how did you get that out of Steve's post?

Jeff DeWitt

Carl wrote:

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D

vicegrips? :]

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M

To start off, I would get a spray contact cleaner and clean the contacts on the TPS which controls the transmission shift points. These throttle position sensors on the 4.0's are notorious for getting bad connections.

Same goes for the other computer sensors like the one on the transmission, they are easily prone to corrosion and intermittent failures because of it because they only pass low power computer signals. Using a spray contact cleaner that the electronic stores sell does them wonders. Coating the plug seals with dielectric grease also helps keep them clean.

When electronic parts fail, they normally up and die. Bad connections usually make the intermittent failures.

I would do the clean before spending money on parts.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: N>
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S

Thank you so much for your time, Mike.

Are there any diagrams on-line that would show me the sensors locations, or should I go ahead and buy the manuals they have for my model at an auto parts store? What particular transmission do you think I have?

Mike Roma> To start off, I would get a spray contact cleaner and clean the contacts

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M

I would get a basic Haynes manual for it. They aren't great but they do help locate parts and give you all the settings for installing things. The factory manual is the best, but it is expensive. I guess it depends on how many repairs you are up for.

Mike

sws wrote:

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