1MZFE engine light

[gladis]

This is a 1MZFE for the Sienna, but knowing how dead the Sienna forum is, and how it's the same engine as the Camry's, I decided to ask it here.

This is actually a generic question. I changed the OEM battery (which was not dead, but leaking acid pretty badly) with a Costco one. Afterwards, I drove it, and about 15 minutes into the drive, the check engine light came on.

So, could the battery replacement be related to the check engine light? The engine sounds fine, apart from the faint whirring/creaking that has been around for a while (which I suspect is a belt problem).

[samarai912]

your going to have to autozone or schucks and ask them to use an obd2 reader to check for codes.

[ASG14]

^ x2

[solidg]

what is the ciode

the number

very helpful

[gladis]

well its my dad's car, he elected to just go to his mechanic.

Mechanic says air flow meter is broken, I'm assuming that's the MAF sensor?

[new echo owner]

Just clean it and see if it returns. Disconnecting the battery have reset the ECM to run on default setting. If the same code returns then check into what the fuel trims are. What was the code anyway, P0171?

N.E.O.

[gladis]

no idea my dad told me over the phone what happened. He just told me the guy told him it was the air flow meter. Too bad in Cali we don't get the codes read for free, apparently.

Took it to autozone and they said they don't do that there.

btw, is there a diy for this?

[new echo owner]

Diy for checking the code? You can get a code reader for that if you want to check the codes. There are inexpensive code readers that you can purchase.

N.E.O.

[gladis]

From where? Most that I've seen were in the 200 dollar range.

I meant DIY for accessing the MAF sensor/replacing/cleaning.

[new echo owner]

The ones that I am referring to is limited function code readers like this one:
http://www.amazon.com/Actron-CP9125-...0804192&sr=1-4.
The fact is the more costly ones sometimes are useless unless you know what you are looking at; you will simply be looking at numbers and not necessary know what they mean. So why not just use the tool to read the codes or to reset the system, or retrieve the code and log-on to a forum and ask questions about the code(s).

There are two screws holding down the MAF sensor on top of the air cleaner housing; just unplug the MAF sensor, remove the two screws, get some electrical contact cleaner and spray down the portion that protrudes into the air cleaner, wait til it drys and reinstall it. Then disconnect the battery again to clear the CEL and reset the system. Reconnect the battery, and drive it and see what happens, of course having your fingers cross won't hurt either.

As I had mentioned, the ECM may have reset to default when you replace the battery, so it may or may not turn on the CEL again. But if you are going to DIY, the above is something you can do under your circumstances.

Good Luck,

N.E.O.

[Eye8Pussies]

try cleaning the maf first

[gladis]

Thanks, I was gonna do it next weekend, when I'm in town again, but my dad got nervous and just let the mechanic replace it. Very helpful information, though, especially for the next time I get a CEL, will definitely get the code reader.

Does the 00 Sienna and 96 Camry use the same diagnostic system?

[new echo owner]

The one in the link will work on both the 96 and 2000, since they both are OBDII compliant.

N.E.O.