Damn. Check engine light on.

Just bought the truck a week ago. And the stinking check engine light came on this morning. Ill scan it when I get home tonight. Runs fine. So who knows. Just venting really.

 

probably nothing to be worried about if the truck runs fine.

 

Yeah. But im super anal with my vehicles. So i will have to fix it. oh well. Its just money right! Cant take it with you when you die.

 

My money its on 02 sensor!

 

Disconnect the positive on your battery for 30 seconds. Then connect it back and see if your light goes off and stays off.

 

I thought about that. But I have a scanner at the house. Once I get off work Ill scan it then clear it. Thanks though.

 

I bought my Tacoma a few months ago and right after I got it home the CEL came on! I knew then the dude had reset it before I came to look at it. At least I know now it has a new o2 sensor that I installed, and that's its an OEM sensor.

 

Whoever had it before probly reset it before selling to you. Reseting will only prolong the inevitable return of the cel

 

That was my first thought. But the day after I bought the truck my work had me go to Chambersburg PA. And that was a 1000mi round trip. I have probably put on 1600mi since i bought it last week. So you think it would have come on then. Oh well. I expected to fix things here and there. It does have 124k on her. No biggie. I just hope its not a cat going out. I had that problem with my 96 taco. And tried to go the cheap route and went aftermarket. Then the light came back on. Went with a oem cat and it never came back on. With the same code anyway. Oh well.

 

Check the fuel cap. Open it, close it, and make sure it clicks 2 or 3 times.

 

Will do. Thanks for the input.

 

Sub'd for what it is!

 

My system too lean code takes about 1-2 weeks to come back on. And that's after 1000+ miles. my 02 sensors would take about a week to come back on..

 

That is never usually the problem for our 1st gens

 

MAF

 

Well i just got home from work. The code is a PO446.
My gas cap is tight. My guess is a charcoal canister. Thoughts?

 

P0446 - Evaporative Emission Control System Vent Control Circuit Malfunction

What does that mean?

Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks. Evap vent valve is usually supplied Batt. voltage with key on. The ECM's driver controls the ground, and when grounded, activates the valve (closing it). If the ECM detects a short to ground, and open,or a short to battery voltage on the control circuit, P0446 will set. Code also may refer to ECM detecting that EVAP system is unable to achieve or maintain vacuum during test.

Symptoms

There will be no obvious symptoms to driver, other than MIL illumination.

Causes

A code P0446 could mean one or more of the following has happened:

Faulty vent valve
Open, short or excessive resistance on Vent valve control circuit
Blockage of vent valve
Bad PCM
Possible Solutions

With a P0446 OBD-II trouble code, here are some things to try:

Replace Vent valve
Repair open, short, or resistance problem in control circuit
Repair open, or short, or resistance problem in power circuit
Replace PCM

 

Thanks for the info.

 

Did you ever repair this?

We're getting a similar P0446 (i think) code on the 2002.. EVAP system. A shop said it's a valve that needs replaced and quoted freaking $600.

Can I buy the valve and do it myself.