Speedo Reads 0 and I Only Have 1st Gear
This happened suddenly when driving on highway speedo started reading about 30 mph less than it should be. Exited highway and car stalls. Restarts no problem but now Speedo reads 0 and only 1st gear. Next day I scanned codes and got (From newest to oldest) P0502(Low Vehicle Sensor Circuit), P0502 and P0705(Transaxle range sensor circuit malfunction). I take car for drive in parking lot with scanner still hooked up and car shifts to second, speedo is moving and scanner reads vehicle speed but speedo seems off by 5mph. I take out on road (car warmed up) and no speedo and only first gear. Scanner is reading car speed. I get back and park and check to see if PCM sees the different transaxle positions and it sees all of them. I moved the selector through all positions about 5 times to see if any were not seen correctly. No new codes set after driving about 10 minutes.
I am thinking that one or more is my problem:
1) PCM is bad
2) Wiring Problem
3) Bad VSS
4) Bad Neutral/Transaxle switch.
I won't be able to get to it until Saturday but I think my first action will be a PCM swap as I have a spare.
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