Check engine light on 2001 toyota prius


#1

Check engine light came on, was diagnosed (at retail auto parts store), as systems weak (spark plug replacement suggested), second diagnosis at independent resulted in O2 sensor: replaced with after-market sensor. Drove 20 miles check engine light came back on. Next time I tried to drive it , it would start but would’t move. Main battery indicator showed severe drain. Towed to dealership. Dealership replaced O2 sensor with Toyota part and replaced a relay (perhaps an ignition relay). Drove a few hundred miles and the check engine light came back on. Independent re-diagnosed as catalytic converter. He reset the computer so that the light went off. Drove 70 miles (meanwhile car passed emissions inspection), drove a few hundred more miles and the check engine light came back on again. So what do I do now? Sell it? Keep on having it diagnosed and repaired? Is it worth it? How much life left in the batteries?


#2

How Many Miles Are On This Vehicle ? Other Than This, Is The Car’s Condition Very Good ?


#3

These o2 sensor replacements with repeated “check engine” lights are turning into a very popular topic,I struggle to come up with a check list to handle the situation.

Your situation is complicated by the expensive battery situation.


#4

Have it looked at again. It may not be the O2 sensor or cat this time.


#5

Let’s get the real codes not someone’s interpretation. The code should be in the format (P0123) There may be more than one code.


#6

89000 miles. Yes, the condition is very good.


#7

a re-test came up with these codes:a)from independent non-certified [P0420]catalytic
and b)from ‘Autosome’[P0420] O2 sensor bank 1, and[P3191]fuel air meter auxilliary emission control massive air flow sensor.


#8

Had it looked at again, and the results appear in the next post below.