Comments on: P0171 Check Engine Code on 2000 Toyota Corolla Part 3

By: Mikes

Mikes — Sat, 12 Jun 2010 02:10:33 +0000

Have a 2000 Corolla and have changed MAF, OS1, fuel pump and fuel filter, Run vacuum leak check, removed and resealed intake. Still has the check engine light. In the process of pulling injectors and cleaning-and the bill keeps on going!
After drive cycle test, shows problem in the fuel system pressures.

By: ejohnson

ejohnson — Tue, 14 Jul 2009 16:29:17 +0000

Have you checked the code to make sure its the same code? If it is running lean still then is it possible that you have one or more clogged injectors? You could try running a fuel system cleaner through if you haven’t already.

By: jorge

jorge — Tue, 14 Jul 2009 01:20:59 +0000

i have corrolla 2000 have a problem with check engine ligth i all ready changed plugs ignition coil cathalic converte both oxigen sensor mass air flow sensor and check engine ligth keep coming on can somnebody help with that

By: ejohnson

ejohnson — Tue, 31 Jul 2007 22:06:01 +0000

They will in some states but in California they are no longer allowed to do this. I think it is corporate policy. They are probably afraid they’ll get sued by someone if their engine gets ruined after having the light reset.

By: DMBarone

DMBarone — Tue, 24 Jul 2007 23:44:58 +0000

Autozone will reset your check engine light for free if you ask them to. As for the p0171 code, my 2000 Toyota Corolla has the same problem and I’m in the middle of diagnosing the problem. Will know more later this week.

By: ejohnson

ejohnson — Mon, 16 Jul 2007 14:52:22 +0000

Try going to the Autozone or to Kragen/Parts America and see if they will rent you an ODB-II reader. They will charge you a $150 deposit that they give back to you when you return the tool.

The tool is relatively small and you plug it in to a connector in under your dashboard on your left hand side when you are in the driver’s seat. It’s about in the middle of my shin when I’m sitting down. Once you plug it in, you turn the key to the “on” position but don’t actually start the car. You will then have a chance to read the engine codes and clear them at that point.

By: Maria

Maria — Sat, 14 Jul 2007 22:05:42 +0000

I also have a 2000 Corolla and I cannot figure out how to reset the “check” light. Would you please tell me how??

By: ejohnson

ejohnson — Thu, 21 Jun 2007 16:41:34 +0000

My car passed smog yesterday afternoon and was well under average for its class for all classes of pollution except CO. It could be that the catalytic converter is a little dirty and the CO reaction is slowed or that the engine is running a bit rich. The problem before was that I was running lean, so if it is running a little rich, it shows that the MAF sensor did fix the problem.