[nihilistphx]

Hi, I'm new here and I already got a problem, lol.

I've recently acquired a 1999 Toyota Tacoma; Its been running perfectly until I was driving home last night. The check engine light came on. I drove home, noticed nothing out of the ordinary, today I went to a local Advanced Auto and they hooked their scanner up to it.

P0440 - EVAP Emission Control System Malfunction

That's what the scanner spit out; okay I am an idiot when it comes to vehicles so what does that mean? What might be broken?

 

[Racer_X]

fill out your profile- do you have a four banger? or six... because you may have a bad egr, or a bad sensor... all which can be fixed for about 10 cents...

 

[nihilistphx]

Sorry, I guess that information would've been useful Its a 4 cylinder, 4x4. Another piece of information: when light first came on I immediately thought gas cap... so I checked it, the rubber gasket wasn't positioned correctly and I corrected that. Today I checked that again and today I heard the vacuum sound when I opened it (ya know, that "woosh" sound), I didn't hear that last night.

 

[Racer_X]

well it ain't the gas cap... did the light go off?

 

[nihilistphx]

Light still on, after double & triple checking the gas cap.

 

[Racer_X]

So it's an EGR failure... two ways to fix it... there is a sensor the threads into the intake manifold at the collector- you can replace that guy, or you can pick up a 10k ohm resistor for about a dime. at radio shack- you'll disconnect the sensor, and plug the resistor into the connection, the ECU will think the egr is functioning properly and say good by to the CE light!

 

[turbotacoman]

So it's an EGR failure... two ways to fix it... there is a sensor the threads into the intake manifold at the collector- you can replace that guy, or you can pick up a 10k ohm resistor for about a dime. at radio shack- you'll disconnect the sensor, and plug the resistor into the connection, the ECU will think the egr is functioning properly and say good by to the CE light!

P0440 is an evap. code, not egr

 

[turbotacoman]

code P0440 indicates a leak on the fuel tank side of the evap. system. This includes the fuel tank, fuel cap, and the lines between the tank and canister, and canister itself.

When the vapor pressure sensor is measuring tank pressure, the ECM is observing changes in pressure and comparing tank pressure to atmospheric pressure. No difference in pressure indicates a leak and throws this code.

 

[nihilistphx]

Does the CE light have to be reset with a scanner, or will it go away on its own once problem fixed?

 

[Firdaddy]

unplug the positive terminal off the battery for a minute or so...:waytogo: best to use a scanner though



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[tacoyota]

hey i think toyota has a recall regarding his problem...its on most toyotas evap system i think. google around you might find a free dealership fix

 

[TahoesHateMe]

hey i think toyota has a recall regarding his problem...its on most toyotas evap system i think. google around you might find a free dealership fix

There isn't a recall for this. Bt there might be a TSB with an updated part number for the Evap Valve.






If you think it was the gas cap seal, disconnect the battery for 5 minutes, If the problem is still there it will come back on in a day or so.



To the guy that said its an EGR problem:badidea:

 

[BatuKing]

He already answered the problem, he said the gasket was not sealed on the gas cap.

So disconnect either the EFI fuse for a few min or use that scan tool you used to get the code to erase it.

 

[nihilistphx]

Yup, that's exactly what it was... got the code cleared and its fine again.