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1988 Mazda 929 88 Transmission issues

Tiny
JLP3
  • MEMBER
  • 1988 MAZDA 929
  • 3.0L
  • V6
  • RWD
  • AUTOMATIC
  • 120,900 MILES
My 1988 929's transmission is not shifting right, sometimes not at all. It triggered the 'Hold' light on the dash to start blinking. What do I need to do to get the codes from the hold light, or in other words how do I put the car into diagnostics mode so the light will reveal the code(s)? Any help is appreciated thank you!
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Saturday, May 30th, 2015 AT 12:04 PM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Near the battery there is a 6 pin and another 1 pin, (both blue ) connector.

Ground the 1 pin connector and turn ignition on to retrieve the trouble code.
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Monday, June 1st, 2015 AT 6:54 AM
Tiny
JLP3
  • MEMBER
  • 2 POSTS
Okay, I did it and I think I got code 12. What does this code mean and could it be causing my problems? Thanks
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Saturday, June 6th, 2015 AT 4:56 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Code 12 is a fault with the Throttle Position Sensor.
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Thursday, June 11th, 2015 AT 8:12 AM

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