Hi all,
I'm new here and looking for some help.
I have an issue with my granddaughters 96 Mazda 626. 2.0L auto trans Last year I had the trans rebuilt by a professional trans rebuilder. Did it on the side as a favor. Recently the car doesn't want to shift correctly , the o/d off light flashes , the tach speedometer and fuel gauges stop working . If you turn the car off and restart it doesn't shift at all until o/d off starts flashing again. Three obd codes come up po 340 camshaft position sensor po500 vehicle speed sensor and po 443 purge valve. Most mornings the car runs . On the way home right from the start it doesn't want to shift until light flashes and then shifts hard . I don't think it's the trans again , I'm thinking a ground wire , found one broken and fixed it but no luck . Any ideas out there?

 

My money would be on a faulty Speed sensor.

 

Thank you , I did a test on the vss that I saw on the Internet where you turn key on (with out starting), press o/d switch to turn on light. Then start car . According to the video if sensor was bad the car wouldn't engage into gear. The car in video did not, but mine did. However since last post I found another loose ground strap . Tightened it. So far , so good. But not 100% convinced yet. So just I case any other suggestions are very welcome.

 

Just a follow up . The car is running fine since I fixed the loose ground strap. Only problem now is the open door light is on all the time . Must be a bad switch .