What was the code? 
Sometimes it takes as much as a few hundred miles...depending on the code.
Sometimes it takes as much as a few hundred miles...depending on the code.
It takes how long to reset my ECU?????
Just tried to get my 97 3.4L smogged....California style....(honey we're moving to Texas!...but that's another story)
The guy had to clear a check engine light that came on two days ago. Figured I'd "kill two birds with one stone".
He sets up the machine and says
"your computer needs to reset"
me--"I thought you just did that?
"you have to drive your car continuously until the computer clears"
me--"How many miles"
"I don't know"
me--"HUH?"
So I drove for seventy miles on a little day trip with the family.....still not "ready".
Somebody please tell me I'm not a very large tool and just fell for an not very funny practical joke.
RT
The guy had to clear a check engine light that came on two days ago. Figured I'd "kill two birds with one stone".
He sets up the machine and says
"your computer needs to reset"
me--"I thought you just did that?
"you have to drive your car continuously until the computer clears"
me--"How many miles"
"I don't know"
me--"HUH?"
So I drove for seventy miles on a little day trip with the family.....still not "ready".
Somebody please tell me I'm not a very large tool and just fell for an not very funny practical joke.
RT
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Bam or fourwd correct me if I am wrong but I believe you can just pull the EFI fuse for 15 min. The EFI fuse is in the fuse box in the engine bay on the drivers side. This way you don't lose all of your preset radio stations.
It's the other part...where the computer has to relearn some parts...like the fuel trims.
P0420 is a common code. All it's telling is that the readings from the front O2 sensor didn't change with the rear O2 sensor. This could mean a vacuum leak, exhaust leak, bad O2 sensor, bad catalytic converter. In most cases, it can be a vacuum or exhaust leak. In our T-100s, most have found out that it's the O2 sensors. Make sure you git the right ones fer yer T-100. The cheapest O2 (Denso) can be found on the web. Search this forum fer some web links fer the places you can git the cheapest ones from.
****DO NOT GIT THE BOSCH O2 sensors!!****
Is yer T-100 a California or Federal spec vehicle?
Dang...fergot about replying to this one.
Best way to check the O2 sensor is when it's operating and with an ODBII reader. I like my Ultra-Gauge since it can read the O2 sensors in real time and you can basically see if it's responding correctly.
I got a P0420 code and doing some checking...I found some cracks in my air intake hose and some bad spark plugs (single ground electrode). After taking care of those and resetting my ECU...my P0420 code hasn't been back.
Dang...fergot about replying to this one.
Best way to check the O2 sensor is when it's operating and with an ODBII reader. I like my Ultra-Gauge since it can read the O2 sensors in real time and you can basically see if it's responding correctly.
I got a P0420 code and doing some checking...I found some cracks in my air intake hose and some bad spark plugs (single ground electrode). After taking care of those and resetting my ECU...my P0420 code hasn't been back.
Bam,
Did a little research on the UltraGauge. I will definitely be acquiring one of these little gems! Be puttin one in mamas 4runner, too.
Just to update my situation. I went ahead and just replaced the O2 sensors. Figured it couldn't hurt and wanted to see if this alone would fix the problem. Well, it didn't. I brought it to a local mechanic and he informed me the catalytic converter was bad. Can't buy an aftermarket one here in California for the T100, so Toyota quoted me $1500!!!! :yikes: The numbers it ran on the smog check were very close to passing, so he ran some stuff (forgot the name of it) through my gas tank. Took it back to get it smogged again and it passed this time!!!!! YEEHAW!!! I'm good to go for another couple of years. By then, I'll have enough saved up for the new converter. Anyway, its all good now. I appreciate all your input. You saved me a lot of wild goose chasing. :thumbsup:
On another topic, if I may. Do you know if the headliner in the SR5 is the same vinyl as my DX? I would love to upgrade to a velour one.
Thanks, again.
RT
Most mechanics see the P0420 code only as the converter being bad. Did you check the condition of yer spark plugs? Pull them and post some piccies of the business end. How's the condition of the air intake hose? Take it off and inspect the insides of it carefully fer cracks. You might even think about having yer injectors checked out/cleaned/conditioned as that was the next thing on my list. If you approach that there may be too much unburned fuel gitting to the converter...it would make sense that yer converter can't process all that raw fuel.Bam,
Did a little research on the UltraGauge. I will definitely be acquiring one of these little gems! Be puttin one in mamas 4runner, too.
Just to update my situation. I went ahead and just replaced the O2 sensors. Figured it couldn't hurt and wanted to see if this alone would fix the problem. Well, it didn't. I brought it to a local mechanic and he informed me the catalytic converter was bad. Can't buy an aftermarket one here in California for the T100, so Toyota quoted me $1500!!!! :yikes: The numbers it ran on the smog check were very close to passing, so he ran some stuff (forgot the name of it) through my gas tank. Took it back to get it smogged again and it passed this time!!!!! YEEHAW!!! I'm good to go for another couple of years. By then, I'll have enough saved up for the new converter. Anyway, its all good now. I appreciate all your input. You saved me a lot of wild goose chasing. :thumbsup:
On another topic, if I may. Do you know if the headliner in the SR5 is the same vinyl as my DX? I would love to upgrade to a velour one.
Thanks, again.
RT
The headliner of my 1998 T-100 SR5 is vinyl...so I'm think it's the same as the DX.
Is there a California spec converter? Or is it some law in California that doesn't allow you to buy an aftermarket converter?
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