Toyota vitz 2007 check engine light , need help or suggestion

[danishmasud]

AOA respected members,
Guys need advice and help regarding my Toyota vitz 2007, 1.0 L. From last couple of days my car’s check engine light comes on as I drive above 100 km/h and then stays on until I don’t turn off the ignition. Car seems to drive perfectly without any issue and didn’t notice any difference in mileage as well.
Visited my nearest mechanic and ran the scanner test which shows P0148 error code due to rear oxygen sensor therefore I changed that sensor straight away with a used one (kabli). It went alright for couple of runs but now that check engine light is coming up again as soon as I cross 100km/h. I am unable to understand this problem . Car runs fine without any issue or knocking, this light goes off when I turn off the car and restart it, but again when I cross that speed limit it comes back again.
Will appreciate suggestion or advise regarding this issue.

[danishmasud]

O bhai anyone outhere on these forums for some solid suggestions

[humayun.chughtai.7]

Dear have a look on my reply to your problem in vitz owners club.

[uzairbilalkhan]

Try to unplug the negative battery terminal , stay unplugged for about 5 mins then plug it back on. that resets the ecu

[danishmasud]

Dear have a look on my reply to your problem in vitz owners club.

Thnx bro for ur suggestion. Will try to do it my self but is it safe to drive like this as in city i rarely drivr above 80 km/h and light comes up only at 100 km/h or above and then it vanish when i tur off ignition and start it back again.

Everything else is perfectly fine including mileage, pick,shifting i mean i cant notive any thing in car. Even i just drovr it to 140 km/h and it went all good without any issue or knocking or anything you could say.

In another thread i was reading and OP mentioned that it was due to his one malfunctioned fuel injector. Do you think this could be the reason for it as well.

[danishmasud]

Try to unplug the negative battery terminal , stay unplugged for about 5 mins then plug it back on. that resets the ecu

Bro already done it. It came up again after i crossed 100km/h. But driving is smooth and i went up to 140km/h today easy

[danishmasud]

Reply from humayun.chugtai.7

"Its kind of a DIY itself. You just need to visit silencer wala to get ur CAT remove from your car. Now take it to your home. Things required : 1 Carb cleaner, 2 bottles of Acid (that namak wala teezab), 500ml of thinner.
Now start ur work, first pour thinner in cat converter and let it come out from the other side with carbon particles, now spray some carb cleaner, then pour 1 bottle of acid in Cat(be careful with handling of acid) and u will see that yellow type material coming out with lots of carbon & dirt from other side. Wait for some 5 minutes and then pour good amount of water, more dirt comes out. Spray some carb cleaner again and repeat this acid pouring wala action again. Now go back to silencer wala and ask him to fit it back & Insha Allah, you will feel hell of difference.
I am suggesting you the above method due to my own experience, I also have vitz 1.3 2001 & had the same problem. But by the help of this DIY, I am very satisfied now.
Also watch some videos on youtube about Cat cleaning, they will help u.
Cheers "

[humayun.chughtai.7]

[quote="danishmasud, post:5, topic:453295, full:true"]

Dear have a look on my reply to your problem in vitz owners club.

Thnx bro for ur suggestion. Will try to do it my self but is it safe to drive like this as in city i rarely drivr above 80 km/h and light comes up only at 100 km/h or above and then it vanish when i tur off ignition and start it back again.

Everything else is perfectly fine including mileage, pick,shifting i mean i cant notive any thing in car. Even i just drovr it to 140 km/h and it went all good without any issue or knocking or anything you could say.

In another thread i was reading and OP mentioned that it was due to his one malfunctioned fuel injector. Do you think this could be the reason for it as well.

[/quote]

Now decide yourself. Because my car was also fine before that DIY, no check light, smooth etc. The only problem was that due to blocked cat, unnecessary pressure starts to build which in return damage the main silencer seal after 1 week max. Means seal got leaked everytime due to excessive pressure and that annoying bhurr bhurr sound starts. Rest take advice from other experts also.
Especially from @Xulfiqar & @rajaatta

[babarhyd]

Use Shell V-Power or Altron high performance for few days... Rev it hard once a week, i mean drive it at high rpms at least once a week. Than post here the outcome.

[danishmasud]

thanks @babrhyd and all. Got the problem fixed today from @rajaatta

it was due to some fault in wiring due to which it was unable to read oxygen sensor 2 and was giving out error P0138. so Got that fixed and Alhamdulillah its good to go now.

Also got my transmission valve body serviced which was in real bad condition and my CAT was completely clogged which i have got serviced as well and now i can feel the difference while i rev my car. It was hell of a job i mean real time taking and pricey but it all worth it at the end of the day.

At the end i have to say and admit that this is guy is a real deal and he knows very well what he is doing.

[anon62748386]

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