Toyota - Corolla :: 2000 - Check Engine Light Reading PO171 / PO172 And PO420

My Toyota Corolla 2000, 123,000 miles, Mass license plate, still getting 34 miles per gallon, has had check engine light on and off for a year.Failed inspection this June.

First garage in Somerville, without doing more than getting the three readings above, said catalytic converter was needed $350 plus labor.I was unable to do the work then and returned to NYC and job. Took to another mechanic recently to get fixed (as I wasn't returning to Mass for a while)and got only PO 171. I mentioned the other readings; they kind of scoffed it off.Trying to save me money (I guess), they cleaned the MAF filter and fuel ejectors for $200. Looked like it was fixed. A week later check engine light came on again and when I brought in found the PO 420 reading. They did not tell me if other computer read-outs were coming up as well.

Now they want to leave the oxygen sensor in front but change the one behind. Put in a newcatalytic converter $539 {they had quoted me $238 but it wasn't an OEM one I guess and they said they wouldn't warranty anything but this expensive one), charge me$137 for the oxygen sensor190 laborplus taxfor a total of a whooping $946!

I am afraid they will do this very expensive job and the check engine light will come on and htey will say o its something else.how can i be sure? also I was reading for a catalytic converter to go bad, something has caused it...what would that be? how to find out. Do they need to do the diagnosis with gas analyzer etc?

Why I spend a huge amount for an old car that is running well, not losing gas mileage, but perhaps is a bit slower on power.

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Toyota - Corolla :: Getting Check Engine Light?

This is a California car that won't pass smog tests with a lit check engine light. I don't know the specific code, but the description is that the torque converter is staying in the "off" position. Apparently the lock up torque converter is part of the emissions system in that if the torque converter does not lock up then the rpm's are higher and that produces more pollutants.

1st step was to flush out the transmission and the flush made sure all the fluid in the torque converter was removed and replaced. After that was done the trans fluid has stayed nice and clean and pink for about 400 miles. The CEL was turned off after this service but came back on in a few days at about 200 miles. Next, the solenoid that activates the torque converter was replaced. The CEL was turned off again, an this time the CEL came back on after a hour of driving on local errands.

Me and my generally good mechanic are hung up now. We were betting the solenoid change out would solve the problem. It seems that the torque converter is in fact operating properly. The tranny shifts smoothly and the rpm's drop at the proper times indicating the torque converter is locking up.

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Toyota - Corolla :: Check Engine Light Came On A Day After Getting Gas

At a service station in NJ, my gas cap flew into the wind and the attendant replaced it. My check engine light came on a day after getting gas (not in NJ) so I took it in to my garage. Ends up that the (new) gas cap has a crack and a new one is getting ordered. Now, whenever I am filling up the gas tank, it keeps shutting itself off (very frequently . . . like every 1/2 gallon or so). This happened when the check engine light was on and after it was initially turned off by the mechanic. I asked a mechanic at the garage because it keeps happening and I can't fill the car fully and he said it happens with some cars and you have to hold it a certain way or something. This can't be fixed and I'll just have to get used to it until I get a new car. My question -- how could this have just started happening? Its a 2002 Corolla and I've had it for years without problems. Is it possible that when I get a new gas cap and the computer gets re-started, it will fix itself?

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Toyota - Corolla :: 1996 - Check Engine Light Goes On

I have a Toyota Corolla 96. The check light is on. I took it to AutoZone and the guy told me everything is Ok. I looked the oil level this morning and it was low. The temperature sensor is normal and the car runs fine. My car experience is almost zero....

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Toyota - Corolla :: Cannot Get Check Engine Light To Stay Off

My girlfriend's 2001 Toyota Corolla has a recurrent Check Engine light problem. It has 144,000 miles on it. For the last few years, we have been unable to keep the light turned off. We have replaced the oxygen sensors and cleaned the MAF sensor. Our mechanic can't find the problem.

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Toyota - Corolla :: 2004 - Check Engine Light Was On Then Went Off After A Day

I have a 2004 Toyota Corolla.

Check engine light was on so I took the car to Midas they pulled a code (133) and they said its Oxygen Sensor is not working. I took the car to Auto Zone for second opinion, Auto zone confirmed that Oxygen Sensor might be having problem. Then I inquire in couple of places for the price to fix O2 sensor, all most all places I got the same quote to fix it.And after a day or so check engine light went off. Check engine light was on for a day or so.

Now I am confused, is there a problem with Oxygen sensors? Should I still go ahead and fix these sensor or should I wait till Check engine light comes back again?

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Corolla :: 2011 - Check Engine Light On / Random Misfire

I have a 2001 corolla with 37K mi on it. The check engine light came on today. Took it to advance auto parts to read the code. It showed P0171 (System too Lean) and P0300 (Random Misfire). Called up a toyota dealer and the technician think it might be bad gas. I buy gas at name brand gas stations and sometimes from BJs. I am not sure if the problem is with gas. I also been up to date with maintenance.

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Corolla / Matrix 2009-13 :: Check Engine Light Is On When Trying To Start The Car

So basically I woke up one morning, was gonna go to work when I tried to start my corolla nothing happened...tried that couple of times and still nothing ....then couple tries later, you could hear the car try to start but then nothing happens. The check Engine light is on when I try to turn on car

The battery and such seems fine. And I don't recall having any problems before, now even the remote control for the key wont work for the car...

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Toyota - Corolla :: Check Engine Light Comes On And Goes Off (PO125 And PO441)

For a few months, I have been getting check engine lights on my Toyota Corolla 2002. The check engine light often goes away by itself.

I took my car to a mechanic with a decent reputation after a couple weeks of the problem. He thought he fixed it and gave the car back to me. The check engine light kept coming back on, and I kept going back. The mechanic topped off the coolant, replaced certain hoses, host clamps, sensors and other parts (like the solenoid canister). After the fifth trip back (and eight weeks of time), he refunded my money.

The check engine light comes on and goes off. Right now with no check engine light on, I get codes P0125 and PO441 PD.

What will happen if I keep ignoring these check engine lights or the codes that persist when the check engine light is not on? I was thinking of going to another mechanic. I think I want to wait for a few more weeks to see if I notice a pattern. I do not drive that many miles each day (much less than average).

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Toyota - Corolla :: 2002 - Flashing Check Engine Light?

I have a 2002 Toyota Corolla CE with about 115,000 miles.While I was traveling on the highway my car started shaking, losing power, and the check engine light started flashing. I drove a mile or two to a rest area because I didn't want to pull over on the highway. I had it towed home. It starts and idles, but I'm afraid to get it out on the road.

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Toyota - Corolla :: 2002 - Check Engine Light Came On After Oil Change

Had the oil changed today; before doing so, I saw that the check engine light had come on. Have been told by 3 professional car maintenance people that there is no connection between needing oil / oil change and check engine, that it would have been the check maintenance light.

Will take it in for diagnostic test by dealer. Also, was told by the oil change guy that he heard pinging which could mean that the car needs to have the valves adjusted, and that the check engine light is due to needing something or other with the gas tank filter which could have a leak/crack, etc.

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Toyota - Corolla :: 2006 - Check Engine Light Comes On When Cold?

The check-engine light on my 2006 Toyota Corolla came on a couple of weeks ago after I started the car on a 7-degree F morning. Code was P-0171. Mechanic cleaned the MAF and the light went off. Light stayed off 'til I started the car on another 7-degree F morning. Mechanic said that the MAF didn't look dirty, and the readings didn't change after cleaning. No vacuum leaks. O2 sensors responding normally. What's going on? I travel a lot in this car, so I don't want to damage the car by ignoring the check-engine light.

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Corolla / Matrix 2009-13 :: VSC Off / Trac And Check Engine Light Flashing

I have a 2010 Corolla. The car is flashing the infamous VSC Off, trac, engine light! The car is still has the powertrain warranty. I was wondering if I should take it to a Toyota dealership.

But I read just getting the diagnostic itself is around $100. I don't want to end up paying for that if the repairs end up being something that's not even covered under the warranty.

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Corolla / Matrix 2009-13 :: Check Engine Light Came On With Code P0352

I have a 2009 Corolla S w/ 79K miles on it and recently my check engine light came on with the trouble code P0352. The engine would misfire while accelerating and then was extremely rough when at a stop light. This issue and check engine light have been happening intermittently over the last few days. I don't really know anything about engines/cars but doing some research came back with the following...

Possible causes
- Faulty Ignition Coil 2
- Ignition Coil 2 harness is open or shorted
- Ignition Coil 2 circuit poor electrical connection
- Faulty Engine Control Module (ECM)

Basically my question is how do I troubleshoot and figure out what the real problem is? I would rather not buy and replace the Ignition Coil if it is something else. From everything I have seen it seems the simplest method to test the coil is to switch out the ignition coil and spark plug on coil 2 with one of the other 3 ignition coils and see if the the trouble code follows it or stays on 2.

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Corolla / Matrix 2009-13 :: Check Engine Light Blinks On And Off 8 Times

I own a 2012 Toyota Corolla S w/ 8700 miles on it I am the first owner. Check engine light blinks on and off 8 times. I cleaned the gas cap threads and neck, then I reset the computer by removing the positive terminal for 1 minute. I also checked the oil it's fine. Light still blinks? I have many years of mechanical back ground, without running codes I don't know this one

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Toyota - Corolla :: 1998 - Check Engine Light On Then Off After Code P0441

About two weeks ago, while driving on a hot, humid summer night, the check engine light in my 1998 Toyota Corolla came on. The following day, I took it into my mechanic, who plugged it in and came up with the code P0441 (Purge flow fault). He told me it was likely related to the fuel vapor canister, though I see this can also have to do with vacuum lines for the purge valve and canister or a bad purge valve itself. My gas cap was, and had been, tight, so it wasn't something as simple as that.

Reluctant to deal with this immediately, I went back to driving it, and lo and behold - the light went off after several days! Unfortunately, the light came BACK ON after several more. And most recently (a few days after coming on again), the light has now gone off!

Both times the light has gone off, the weather has been rather wet, but otherwise, there doesn't seem to be a clear pattern. What this on again off again pattern might say about the problem?

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Toyota - Corolla :: Check Engine Light Stays On - Charcoal Canister?

1998 Corolla LD ... Diagnostic tests show that my check engine light stays on due to a charcoal canister. Is this an expensive repair?

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Toyota - Corolla :: 2008 - Check Engine Light On / Bad Gas Or Vacuum Leak

I have a check engine light on the car and in the past it has been bad gas or a vacuum leak. Dealer says on toyota that is not possible.

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Toyota - Corolla :: Check Engine Light On / Small Evap Leak

I have a 2004 Toyota Corolla- the CEL has been on for months- the code is for small evap leakI have tried cleaning rust from filler neck at gas cap- no change. I have had a smoke test done with no leak found.

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