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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Re: 03 toyota corolla engine light on again!
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.
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Did you buy this from a dealer? if so, you should have taken it back ASAP I dont know why you didnt have the Toyota Dealer fix the car, now your in the middle of a mess, getting 2 shops involved, and the car still has a problem. When you bought the car, whoever you bought it from, knew there was a problem, cleared the code and it took a while for the check engine light to come back on. So now you will just have to pay someont to fix the car. The trans shop told you it needed a converter and solenoid, the problem is still there, so make it their problem. I think you need someone who knows toyota . theres no recall that I know of. Recalls are free, anyhow. . ecm is warranteed 8 years or 80k miles. Have the dealer check it out. Have them Check Bulletin TC008-04 and T-SB-0378-08
There is currently a recall going on for this problem. You can likely get your money back on the prior repairs as well. See this link http://www.toyota.com/recall/corolla-matrix.html. On the left-hand side, you can click to take you to put in your VIN and see if your vehicle is included. My 2007 vehicle IS included, and I just had the check engine light come on and have been experiencing rough shifting for about 6 months. When the light came on yesterday, it was extremely rough jerky shifting. The light went off today. Took it to Autozone and got same code P2716. Toyota has assigned me a case number, but I won't get a call back until Monday or by close of biz on Tuesday. This problem can cause your car to not start, or to shut down while driving. YIKES! The person I talked to at Toyota acted a little too nonchalant about the whole deal. Telling me to just wait for the call that I will get. She said most dealers would not have the part needed to fix this. According to what I have read. That is the reason why Toyota is not sending out the notification letters to the affected parties until mid-September. Check out all the info and good luck. I am a little bit p.o'd about this right now. - Natalie
Idle is factory set and cannot be adjusted, your best bet is checking for cracked hose pipework for air intake at idle,(not at problem under exceleration and driving) Any slight upset to the air /fuel ratio will be most prevelent at idle speeds.Check hoses where the meet metal flanges on manifold intakes and any sharp bends in ppipes.Good luck
THIS FIX IS COURTESY OF EXPERT TOYOTA ED, HE IS A TOYOTA DEALER SERIVCE MANAGER, THANKS ED! There is a known issue with the 2005-2007 Corolla automatic transmission shift logic. The shift points may seem harsh, and the Check Engine light may be illuminated.
There is a technical service bulletin published (TC015-07) that will address and rectify this condition.
The diagnostic code P2716 will be stored in the computer memory. The procedure involves replacing the Engine Control Module (the computer) with an updated unit.
The repair is covered, under the factory warranty, for 96 months, or 80,000 miles, which ever comes first.
I have to tell this: Your dealer screwed up. The P-0171 remedy was to clean the Mass Air Flow Sensor, NOT replace an O2 sensor. The P-0125 indicates that you have the insufficient coolant temp, which is a thermostat sticking open. This is why your idle is so high, the coolant is not up to operating temperature, 192 degrees F...Clean the MAF and replace the thermostat, and tell the dealer that he screwed up on the O2 sensor diagnosis/replacement. They put an O2 on for no reason. Better yet, have THEM clean the MAF and replace the thermostat. They owe you that much.