Missing o2 sensor

Hassan1991 (Electrical Engineer ) 2021-01-01 03:01:01 +0500 #41

Single o2 before cat.
2000-2005 toyota yaris or echo probably.

atifbetani136 (Los Pollos Hermanos) 2021-01-01 09:01:54 +0500 #42

Ok so the problem is still persistent and now I Am starting to notice very strong petrol smell in the cabin when the car is started and it becomes intense when the car is moving at a higher speed .I checked the under side of the car but there seems to be no leaks I also removed the engine cover and checked the injectors but no leaks there as well .
Don't know what the hell is going on. the car is just breaking down on me.
One more thing when I open the fuel cap after a little run It sounded like opening of soda bottle, if that helps.

hasankhurshid29 (Hasan Khurshid) 2021-01-01 18:43:52 +0500 #43

Have you checked the fuel pump are under the rear seats?
@Xulfiqar

hasankhurshid29 (Hasan Khurshid) 2021-01-01 18:47:03 +0500 #44

Get your dlc port checked if its connected or not. Try to connect ecu through professional scanner if its connected your scanner is bad. Also get your check light connected.

atifbetani136 (Los Pollos Hermanos) 2021-01-01 19:04:02 +0500 #45

My scanner is not working and the electrician had only a 12 volt bulb which he was frequently using while installing the sensor he didn't have a scanner. here in KOHAT nobody has a scanner so I'll be going to Peshawar soon if any pakwheeler can recommend a professional mechanic and electrician there so kindly do tell.

atifbetani136 (Los Pollos Hermanos) 2021-01-01 19:06:14 +0500 #46

Thank you.

capsat (ومن شر حاسد إذا حسد) 2021-01-01 19:24:55 +0500 #47

@dayrider @def3nder any reliable shop to resolve issue in Peshawar?

hasankhurshid29 (Hasan Khurshid) 2021-01-01 21:40:52 +0500 #48

If you think your scanner is bad and its not working on any other car then you can buy this one which I am using for more than an year without any issue and if doesn't work you can return it:

dayrider (dayrider) 2021-01-02 22:12:14 +0500 #49

He can go to new car care, Gul nawaz 0300 5856543.
Nawab ustaz is the best electrician but he is always busy.

atifbetani136 (Los Pollos Hermanos) 2021-01-02 22:25:32 +0500 #50

Thanks.
Where is Nawab ustad shop located?

dayrider (dayrider) 2021-01-03 06:58:54 +0500 #51

In takkal, it's next to new car care. Contact Gul nawaz and ask him to also involve nawab ustad in the diagnosis

atifbetani136 (Los Pollos Hermanos) 2021-01-14 10:01:28 +0500 #52

Went to shoba bazar yesterday. there I met Jehanzeb ustad he was the one who installed the o2 sensor he repaired the gauge cluster as the temp and the fuel needles were not working he also fixed the engine check light.the fan was direct so he made it auto. Didn't check the car with scanner as it was not connecting to the ecu. The car is not giving check light. The car seems to run a lot smoother now but I notice on the way back the temp needle will fluctuate it would go down at higher speed and vice versa. So I contacted him and he said that the engine t valve must have been removed and told me to check it and and buy a new t valve if removed or damaged. Also the raw petrol odour seemed to have minimised maybe it was due to the direct fan setup which caused the engine to run rich all the time and produced rich exhaust. I don't know what do you think .Also is the fluctuation of temp due to t valve?
@xulfiqar
@Hassan1991
@hasankhurshid29
@capsat

Hassan1991 (Electrical Engineer ) 2021-01-14 15:25:34 +0500 #53

Yes. Fluctuation is due to missing thermostat valve.
Engine runs in open loop when cold. Cold here means less then optimum temperature. In open loop mixture stays rich. As soon as temperature rises to optimum, ecu goes in close loop means start reading the o2 sensor and adjust the mixture.
Install new thermostat valve.