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2001 Auto Trans. won't switch to high gear

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Old 18 Feb 2011, 11:28 am
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Question 2001 Auto Trans. won't switch to high gear

2001 LE PT with 170,000 miles.
Daughter travels to college, called home complaining that her PT will not go over 45 MPH, without red lining RPM, and that check engine light came on breifly then went back off. I had her pull over and let car sit a while.
After 40 minutes I arrived and it ran like normal. Brought back and had someone replace transmission fluid and replace transmission filter. Few days later same thing happened. Has been happening on/off for a week now.Had the radiator replaced 2 years ago and replaced radiator fan last year. Any suggestions? Was quoted around $2000 for transmission replacement/rebuild.
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Old 18 Feb 2011, 11:44 am
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Default Re: 2001 Auto Trans. won't switch to high gear

solionade or how ever you spell that work it is on the top of the tranny
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Old 18 Feb 2011, 12:30 pm
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Default Re: 2001 Auto Trans. won't switch to high gear

It probably is the "solenoid" but first question: when the engine light came on, did you check for a fault code? Those codes help us help you to find an answer. The problem is, most transaxle fault codes show up as a P0700 which means it's a general fault that needs to be checked by an OBDII scanner from the dealer or shop. Did the shop that replaced the fluid just change fluid because you asked or did they check for a fault?
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Old 21 Feb 2011, 02:21 pm
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Default Re: 2001 Auto Trans. won't switch to high gear

Thank you for your response, I had to wait until today to get the codes from the test.
P0700-Transaxle Control System Fault
Shortened or open circuit within transacle
Failure of transaxle control module

P0605-ROM Fault
Shortened solenoid or sensor within transmission
Shorted electrical circuit
Failure of transaxle control module

I had the repairman replace the trans. fluid and filter per my request, prior to getting the codes.
The cost of a replacement Solenoid at my local parts store is around 180.00.
Do you believe that this will correct the problem?
Is this a fix that a normal person can make or do you suggest that I leave it to the pros?
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Old 03 May 2011, 06:24 pm
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Default Re: 2001 Auto Trans. won't switch to high gear

I had the same problem but after turning the car off and waiting about 5 seconds and restarting it it would run fine. This only happened in weather above 60 degrees. When spring came I took it to a transmission shop, they replaced the speed sensor and rebuit the transmission and returned the car to me. Within 48 hours the problem was back. The shop now finds that the transmission controller is bad and we are waiting for a new one.
Good Luck
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