Question about 2000 Mazda Protege

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99 protege 1.6.when put car in reverse it engages harsh and o.d. light flashes and engine light comes on code 0123. tried a new t.p.s. sensor and had same problem

I am a licensed mechanic and need some advice on this problem. hard shift in reverse,code p0123,flashing o.d. light. all happens when put in reverse. also driving at highway speed at normal temperature in overdrive the car will drop into 3rd gear and rev up. i tried a new tps sensor and checked all obvious things. please help

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  • Master
  • 2,101 Answers

That is your 3 and 4 shift solenoid in the transmission. it is stuck open and needs to be replace. it is very easy to do.

Posted on Jan 03, 2013

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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: down shift. flashing hold light

THE TURBINE SPEED (PART OF THE TRANSMISSION CONTROLS) SENSOR IS THE CULPRIT HERE, REPLACE IT.

Posted on Apr 14, 2009

johnjohn2
  • 5763 Answers

SOURCE: code po705= Transmission range sensor, circuit

i ve run into this problem a few times,with no cler results,i checked all wiring from computer to switch and all check out fine i also replaced switch and a month later same code,this one ended up with a bad pcm, another one had a bad wiring for overdrive switch, this was not an easy repair to diagnose.i think you should have amazda dealer look at it.

Posted on Mar 03, 2010

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