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Old 08-26-2010, 05:13 PM   #1
ownedinthedome
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1993 SC2
Default Unknown Check Engine tranny problems

93 Saturn SC2 (automatic)

A little while ago I was driving my car and noticed my check engine light was on. Took it home, looked, and my oil and tranny fluid was low. Filled them both up and everything was fine. Drove it, engine light was off, alright good to go. Later on it turned on again so I took it to a shop and the reading said "PCM can not find code" or something like that. Checked my fluid levels twice a week after that, still full.

My check engine light is only on about 5 out of the 7 times I start my car. When it is on, it shifts into Drive and Reverse extremely hard. When I am slowing down it downshifts from 2nd gear to 1st really hard, no other gears. When I take off it is really slow and bogged down almost, its almost like my car starts in 2nd gear (my car shifts 1st 0-45, 2nd 45-70, 3rd 70-100 and so on) instead of shifting into 2nd when i floor it at 45, its like it skips it and shifts at 70. Also when my check engine light is on my tranny starts buzzing.

When my check engine light is off, NONE of these problems occur, it runs completely fine. The check engine light is not constant, so I don't think its mechanical but I think its electrical. A problem with the computer or a sensor. Anyone have any input

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Old 08-26-2010, 05:20 PM   #2
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1997 SL2
Default Re: Unknown Check Engine tranny problems

Only thing I can suggest right now is check your battery and alternator.

12.5v with the engine off
14.4v with the engine, heater, and accessories on

also make sure all connections are tight and free of corrosion.

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Old 08-26-2010, 05:34 PM   #3
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1996 SW2
Default Re: Unknown Check Engine tranny problems

Got a paper clip? You can obtain the code(s) when the SES light is on yourself; instructions here: http://www.saturnfans.com/forums/showthread.php?t=28570 . Tell us what comes up.

More on obtaining the SES light codes, courtesy of the inestimable Low Saturn:
http://www.differentracing.com/tech_...diag_info.html
http://www.differentracing.com/tech_...dtc_chart.html
http://www.differentracing.com/tech_...ttc_chart.html

Oh, and since you're in Rockfish, could you do us all, and the world, a favor, and go find this car and put it out of its misery? And have a little talk with the seller (he's been trying to unload that albatross for over two years) about what happens when you mis-pimp a Saturn? (Oops, sorry about the topic creep....)

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Old 08-26-2010, 08:37 PM   #4
ownedinthedome
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1993 SC2
Default

Quote:
Originally Posted by madpogue View Post
Got a paper clip? You can obtain the code(s) when the SES light is on yourself; instructions here: http://www.saturnfans.com/forums/showthread.php?t=28570 . Tell us what comes up.

More on obtaining the SES light codes, courtesy of the inestimable Low Saturn:
http://www.differentracing.com/tech_...diag_info.html
http://www.differentracing.com/tech_...dtc_chart.html
http://www.differentracing.com/tech_...ttc_chart.html

Oh, and since you're in Rockfish, could you do us all, and the world, a favor, and go find this car and put it out of its misery? And have a little talk with the seller (he's been trying to unload that albatross for over two years) about what happens when you mis-pimp a Saturn? (Oops, sorry about the topic creep....)
Haha I was looking at that a couple of times. What do you mean by mis-pimp?

The codes are "pcm can't find code" so I figure the engine computer isn't talking to the tranny computer

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Old 08-26-2010, 11:32 PM   #5
madpogue
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1996 SW2
Default Re: Unknown Check Engine tranny problems

Quote:
Originally Posted by ownedinthedome View Post
Haha I was looking at that a couple of times. What do you mean by mis-pimp?
From the "Pimp My Ride" TV show - the term was actually coined by The Onion: http://www.theonion.com/articles/ride-mispimped,9534/

Quote:
The codes are "pcm can't find code" so I figure the engine computer isn't talking to the tranny computer
There aren't two separate computers. The PCM controls both the engine and the tranny. The "mechanic" might very well not have tried the right way to communicate with your PCM. Carry a paper clip with you, so that you can do the trick to get the codes while the light is on.

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