I'm back. since replacing the injectors, I have not received any p0171 codes (see "Corolla 2006 and ongoing P0171 code"). Fishexpo101, I replaced the downstream O2 sensor and the P0420 error went away. What's strange about that issue is I replaced the original sensor with a Bosche 2.5 years ago. This time I replaced the Bosche with Denso and the error code disappeared. Thanks again Fishexpo101 ...
Now for the new issues. My corolla '06 finally went over the 300000 mark but the odometer is stuck at 299999. I just got back from the dealer and they quoted me $500 to replace/repair. Any thoughts?
Also, I have been having rough idle problems for quite a while know. I would have added this issue earlier but I thought resolving the CEL error codes was more important. Anyway, the car idles rough when in drive and the gas mileage is not great. What's weird is if I reset the system by disconnecting the battery the gas milage is great until the car resets after 60 to 80 miles. Then the rough idle comes back and gas milage drops. The dealer quoted me $229 for a fuel saver package. this included a throttlebody cleaning.
Just to let you know, last week I sprayed and cleaned throttlebody with a toothbrush using throttlebody cleaner. My model has the automatic throttlebody so I do not have the IAC switch. (hope this info is correct?)
I know, I know. I should have come here first before paying $99 for diag. service tech also noted leaks in valve cover gasket, water pump and timing chain tensioner. I believe I can handle these (I did replace my fuel injectors :-)
Well that's it for now. 299999 odometer and rough idle/poor milage. any and all advise would be most appreciated.