1988 Mazda 929 88 Transmission issues

1988 MAZDA 929
120,900 MILES • 3.0L • V6 • RWD • AUTOMATIC
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JLP3
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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!!
May 30, 2015 at 12:04 PM
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KHLOW2008
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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.
Jun 1, 2015 at 6:54 AM
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JLP3
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Okay, I did it and I think I got code 12. What does this code mean and could it be causing my problems? Thanks
Jun 6, 2015 at 4:56 PM
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KHLOW2008
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Code 12 is a fault with the Throttle Position Sensor.
Jun 11, 2015 at 8:12 AM