Question about 2000 Toyota Corolla

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03 toyota corolla engine light on again!

So ive had my 2003 corolla a little less than a month now. and the check engine light came on. i took it back to the dealer and they came back with a code p0171 so they replaced my o2sensor. I drove it about 45 miled and the light came on again!!! Now the code is a p0125! also when I am in park the idle is around 1800 then drops down to 850 when in reverse or drive. Did I buy a lemon?? please help!

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  • Anonymous Dec 02, 2008

    hey i have the same problem too. do u think it's better to just replay the maf sensors?

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Without seeing your vehicle on my scan tool, it is hard to see what is exactly going on.
But, please allow me to share the following info with you:
The P-0171 code relates to the Mass Airflow Sensor. This is a VERY common code with the Corolla product.Your dealer *** should *** have inspected it for dirt contamination, and cleaned it, if it was indeed dirty.
Secondly, The P-0125 relates to Oxygen Sensor number ONE. If your dealer replaced the wrong sensor; (#2), you can expect to have problems.
My advice: unplug, remove, inspect & clean the MAF sensor. Ensure that the air filter is clean.
This should help you quite a bit.

Posted on Oct 13, 2008

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