VSC, Check Engine, Trac Off ?????????

leathermantool · 04-14-2009, 02:31 PM

What are the effects or problems oh having the code P0012. Less mpg? Ruff idle? Will it cause problems if you don't repair. I know it won't pass emissions... Unless you erase code before you go.

PCH · 04-14-2009, 02:46 PM

You loose VVT function: valve timing is not adjusted by the ECM, so it'll be making less power at higher RPM.

JerryXb · 04-16-2009, 12:51 PM

Quote:

Originally Posted by leathermantool

What are the effects or problems oh having the code P0012. Less mpg? Ruff idle? Will it cause problems if you don't repair. I know it won't pass emissions... Unless you erase code before you go.

Mine ran probably close to a month between the first CEL and the repair. I didn’t notice anything besides 3 annoying lights on the dash.

astroJR · 05-04-2009, 03:55 PM

Mine has been off for months, and im due for Inspection. Im also on bags and have tinted windows .. in NJ .. wish me luck lol.

astroJR · 05-08-2009, 10:11 AM

failed for good P0420

scionxb05 · 05-09-2009, 05:42 PM

ok so i have been having the same problem like everyone else with the VSC, Trac off, and engine light. Those three lights have gone on and off for about a few months now.

I finally went to Autozone to get the code and this was it P0012.

There are a list of problems it might be, but i was reading some of the posts on here and there are many different reasons why these lights are on.

My box runs great, ever since that light came on i have not seen any difference in the driving...does anyone have any suggestions on what i should do?

astroJR · 05-09-2009, 10:47 PM

Ya i failed P0420, my catalytic convertor, it got fixed under warrenty, 8 year 80,000 miles ! So happy about that.

Speaker_xB_ox · 05-09-2009, 11:20 PM

Hmm i have a little different problem, but almost the same... I have the Traction control, VSC, and ABS lights on... no actual change in driveability or anything just the annoying lights and the looming emissions test... the dealer said one sensor controls all three of them... should i pay for the sensor to be replaced or what?? any ideas before i start trying to shell out cash for possible fixes... oh and btw I allready reset my battery and they came back on like 5 mins after running it....

PCH · 05-10-2009, 10:53 AM

There are, like 7 engine related sensors that i can think of. Which one? Do you know the code that causes the lights to come on? With the emissions test coming up you don't have a choise but to have it fixed. Driving with the warning lights on is never a good thing anyway.

carortbB · 05-19-2009, 08:39 PM

Hi I am new in the forum I was reading about VSC TRAC OFF AND CHECK ENGINE Light on I fix my car replacing timing control valve and a oil timing control valve filter they are one next to another culd be just the oil filter clog
you can take off clean it and put it back than disconect the battery for a couple of minutes to reset the comp. this I am talking about when you use a scaner and the codes PO0012 AND PO0013 Pops up. this is how I fix it.

mntegra01 · 06-23-2009, 07:49 AM

well the dealer just fixed my car under warranty. the P0420 code was on meaning it was either the secondary O2 or the cat was bad. dealer replaced both and my VSC and TRAC OFF came on one so far again... we shall see how this goes. Tradin up to a Camry soon hopefully : /

ekomomy · 06-29-2009, 05:23 PM

We were having the same problem with my Daughters 2005 XB and tighten
the crank sensor for some reason it got loose. Lights out problem solved.

krnricebox · 07-23-2009, 10:56 PM

well i had this problem after i installed my injen short ram. it was about 3months after i got it installed. my friend has a shop so went ahead and got the codes reset and about a week later it came back on. a few days later it went off and hsnt turned back on so i guess im on the lucky side.

BOXICAN · 10-02-2009, 09:59 PM

I have codes p0441, p0442 and p0446 , I saw that someone else had the same codes but I can't find the post , anyway does anyone have any input on the solution ? No engine mods and I have done all the other quick fixes and still nothing , going to check it out at Taz's hopefully we can find the problem and I won't have to take it to the dealer and get wallet raped. Any help will be greatly appreciated. THANKS !!

PCH · 10-02-2009, 11:09 PM

EVAP problems. Make sure the gas cap is tight, check lines at the valve by the air filter, clear the code and see if it comes back.

Tech info for those codes: http://www.myjdmphoenix.com/images/0...rol%20leak.pdf

HaoleXB · 10-03-2009, 11:32 AM

p0441 evaporative emission control system incorrect purge flow

p0442 evaporative emission control system leak detected small leak

p0446 evaporative emission control system vent control circuit malfunction

breauxseph · 10-25-2009, 04:18 PM

i've had these on for a while now but the car still runs perfectly. i just can't figure out why for the life of me. it sucks.

gravebox · 10-26-2009, 03:47 AM

Quote:

Originally Posted by HaoleXB

p0441 evaporative emission control system incorrect purge flow

p0442 evaporative emission control system leak detected small leak

p0446 evaporative emission control system vent control circuit malfunction

that's your Evap switch that's clipped on the side of your air box. you might have some dirt or debris in the power cable to it or it's stuck or possibly dead.

doesn't do anything dangerous to the car if dealt with in a timely manner... BUT, the system is specifically meant to purge fuel vapors from your fuel tank. this is system is what replaced the return based fuel system to a return'less fuel system. without the purge, fuel vapors will accumulate and become dangerous. any time you refuel the car, you risk chance of spark with static and metal to metal contact. if there is accumulated fuel vapors and just so happen to catch a spark... well, you can get the point i'm getting to.

also, do know that it's also used for mileage reasons. the Evap system takes advantage of the vuel vapors by purging them into the intake AFTER the MAF sensor, allowing the ECU to notice a larger amount of power being generated than it's calculating, so it cuts fuel useage down slightly while the purge is active. once it sees normal power production again, it goes back to it's original configuration.

also, the Evap purge activates VERY often. when i had mine disconnected, it activated almost once every 10 minutes so it's probably safe to say that it probably greatly effects mileage by as much as a few MPGs depending on the environment and driving habbits.

i would see if your purge unit needs to be cleaned or replaced or what have you. like i stated before, it's located on the side of the stock air intake filter box. it's small with a tube comming from the back of the firewall up to it and another tube going directly to the throttle body. it also has a small 2 wire harness clipped to it.

PCH · 10-26-2009, 11:35 AM

Quote:

Originally Posted by gravebox

the system is specifically meant to purge fuel vapors from your fuel tank. this is system is what replaced the return based fuel system to a return'less fuel system.

Having a returnless fuel system doesn't have anything to do with EVAP.
"Returnless" means there is no fuel return line to the gas tank from the fuel rail. The only fuel line to the engine is supply from the pump unit.

gravebox · 10-26-2009, 02:51 PM

yes, but to my understanding, the returning based systems allowed the cirulation of warmer fuel, allowing accumulating vapors to eventualy be burned over time. without some sort of purge for the fuel vapors, the fuel tank becomes an extreme hazzard, like allowing half empty rattle paint cans sitting in the hot sun for hours.