P0705 code and check trans-axle light came on

2001 MERCURY SABLE
125,000 MILES • 3.0L • 6 CYL • 2WD • AUTOMATIC
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BILL GALANT
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I have the car listed above LS model, 24V.

Both the engine light and the check trans-axle light came on yesterday. I pulled the code on it and it was a P0705.

So, I figure I would change the transmission range (TR) sensor (also called neutral position switch), not that difficult to replace. However, that did not fix the problem.

Each time I put the car in revers it "bucks" (but it has been doing this for seven to eight years), and when I put it in Drive (D) the Check trans-axle light starts blinking and it still throws the P0705 code.

I checked the transmission fluid and it looks clean, I could add a little, but the level is still in the hash.

The car still drove well after throwing the code, I have not test driven it after changing the TR sensor.

Any ideas on what to check next?

Regards,
Bill.
Mar 23, 2018 at 11:14 AM
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Hello,

It sounds like you have a bad connection between the PCM and the range sensor. Here is a guide to help you check the connections:

https://www.2carpros.com/articles/how-to-check-wiring

Here are the wiring diagrams for your transmission.

Check out the diagrams (below).

Please run this test and get back to us.

Cheers, Ken
Mar 26, 2018 at 9:33 AM