Hi all! - I've recently purchased a (used) Toyota Prius, GEN II - 2007, NHW30 The check engine light is flagged - and I've been told that the vehicle had a historical error code - "CATALYST CODES P0420" I've been quoted by Toyota $187 AUD to have a scan tool place on it again, I've got the sneaking suspicion it's a faulty or aging oxygen sensor - Moving forward, I'm not too keen on paying out every time I'm hoping to diagnose something, What is the best scan / diagnostic tool for the Toyota Prius available on the Australian market? I'm hoping for the scanner to be able to pick up on oxygen sensor information, airbags - just about everything that a Toyota mechanic would be able to - but within reason if its pricey Hope you can all help me with this one! - Swurlo
No it's not an. 02 sensor. It is probably you catalyst .. Autel ap200 will cover you . Unless you're a real Keen meccie.. I use the ap 200 more than I pull tecstream laptop down these days. Good luck . The catalyst is just below the threshold of being able to do its job . This is a self test the car produces at random
Read post #1 and then scroll down to post #37 in this thread, https://priuschat.com/index.php?posts/3246758 You want to choose a scanner that is capable of communicating with all the ECUs in the car. The Autel AP200 is a good choice. Be advised that you will need to login to the app when you want to use it, so you need internet access.
If that's the only code you end up getting, then you likely need to replace the catalytic converter. HOWEVER, if you still have the original CAT, it's worth $$. I'm not sure of the current rate, but I scrapped mine for $1400 a few years ago. You can buy a cheap aftermarket version which should last a little while - mine lasted 2 years. Or you could try a spacer. That got rid of the code on mine for another year.
Could be an O2 sensor. Swap the downstream one first. It's really easy. If that doesn't fix it swap the other one but it is a PITA.
99% it's not the sensor.. firing the labor statistics because of bad numbers will not fix or identify the issue.
