Tachometer and overdrive lights are blinking

Tiny
KEYSERSZ
  • MEMBER
  • 1996 FORD MUSTANG
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
Car has low torque when I first press the accelerator wont even pass a speed bump without a little head start and the tachometer is also not working. I did notice the other day that the overdrive light went off and the tachometer started working again and the torque came back. This went on for a few minutes soon after the overdrive light started flashing again and lost torque again.
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Friday, May 1st, 2020 AT 8:28 AM

5 Replies

Tiny
KASEKENNY1
  • EXPERT
This sounds like a possible speed sensor issue or even a throttle position sensor but we need to start with codes because there are a lot of possible causes and we don't have enough to go on yet.

Here is a guide on how to check for codes or you can stop by a parts store that does this and they will get the codes free of charge:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Let me know what you find and we can go from there. Thanks

https://www.2carpros.com/articles/symptoms-of-low-engine-power
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Saturday, May 2nd, 2020 AT 9:01 AM
Tiny
KEYSERSZ
  • MEMBER
So I have checked the codes on the vehicle and they are as follows:

P0708
P1131
P0117
P0755
P1445

Also I have noticed the negative battery cable gets really hot in sure there is a ground issues also can that cause some of these codes?
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Saturday, May 2nd, 2020 AT 2:00 PM
Tiny
KASEKENNY1
  • EXPERT
P0708 - Transmission Range sensor is open
P0755 - Shift Solenoid Electrical malfunction
P0117 - Sensor signal voltage is low
P1445 - Purge Flow sensor circuit issue

Based on these codes it appears you have a wiring issue with the transmission. I would start with running through these DTCs diag steps and see where it leads you then update me on what you find and we can go from there. Thanks
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Sunday, May 3rd, 2020 AT 5:07 PM
Tiny
KEYSERSZ
  • MEMBER
On the instructions it states if the tool fits to go to TD2 however there is no TD2 sheet.
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Sunday, May 3rd, 2020 AT 9:08 PM
Tiny
KASEKENNY1
  • EXPERT
Sorry. Here are the couple of sheets needed. I thought I looked at that but clearly didn't provide it.
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Monday, May 4th, 2020 AT 6:38 PM

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