Thank you, it did go to Idaho after passing last March, but I dont think any work done there. The smog place says current sensor is not working "stuck open"? They say the referee found a repkace for $900! I think they are hosting me and dont know what they are doing from all these posts. I am going to have them run test and fail and since I already paid over $675 I can apply for a two year waiver and take to one of the mechanics listed on this site near me to help take a look. Appreciate all the help everyone.Since Homer posted his VIN, I ran it through the BAR smog check history. There are only three CA smog checks on file, suggesting the vehicle was out of state prior to 2018. Unless you have gone through all the emissions trouble shooting already, I would recommend (1) replacing the vacuum tubing (thereby making sure it is routed properly) then (2) do the system checks found in the 2F emissions manual.
You don't say why you need a new CAT temperature sensor...is it missing or does the shop think it is not working? As posted earlier, all it does is provide over-temperature protection for the CAT. If the cat gets too hot, then it stops the Air injection into the exhaust. I suppose if the sensor has failed then the AI system may not be working properly. But the checks from the emissions manual should help identify where the problem is.
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