any 1 plz help abt check engine light in vitz?

[as2d]

hi guys!
i've a vitz 2003. i've installed cng (landi renzo kit+ digicar's advancer emulator sensor three in one+ faber cylinder) but the very next day i m surprised to see engine check light is turned on. i've checked the fuel cap but its still on.
then i tried to run it on petrol and light turned off. i discussed with mechanic who installed cng. he says that same problem comes in vitz and honda city.

plz if anybody knows solution. plz plz plz let me know.

do any 1 else having same problem.

thanks in advance

[waleed80]

no big deal
happens in most of them
O2 cheater is the answer to ur problem, but if the car is goin ok, dont worry abt it.

[as2d]

thanks a lot

yea its running smooth but i wanna know when there vl b problem how shall i come to know that light is on due to genion problem. not because of cng.

with thanks

[as2d]

is there any proper way of getting rid of it. instead of o2 cheater.

[Bug_Lover]

@waleed80

It has electronic sensors in it which gives check engine light any time if there is even lil wrong with engine ,,Like if oil nead to be change or service or tune up is deu so absolutly no nead to wory coz when you switch from petrol to Cng the original settings disturbed so engine check light will come on , its worry free,,, just un plug both betrry terminals and put it back on after 1 minute most probablly it will go off

[akila]

may be just something wrong with the light

[thunderRider]

Most probable cause soon after installing CNG is the O2 sensor. Your car utilizes closed loop control for most efficient burning of fuel. The O2 sensor measures the oxygen content in the exhaust ; i.e. rich or lean fuel. the sensor reports in the form of voltage signal which continuously varies for a normal operating engine from .2 to .8 volts. high voltage indicates rich mixture and low voltage lean mixture. accordingly the ECU continuously varies the injector timings to adjust the fuel. However, when u drive on CNG the exhaust composition is not the same; therefore the O2 sensor reports out of limit errors.

Using the O2 sensor emulator (available for 2800 Rs PVR make) can be used to come into action whenever u transfer to CNG. This way the computer is sent a good signal and it is fooled to believe that all is well. Remember, on CNG ur injectors are cut out by the emulator and it sends signal to the ECU that the injectors are working ok---same approach for O2 sensor.

Remember to tell the CNG mechanic that out of 4 wires on the O2 sensor -- 2xblack (for heater), white (ground) blue is the one for ECU signal Input.

Good Luck and do not worry. ur car is just saying that the emission control is not working OK. but the consumption could still be high as the computer is running open loop control. Let me know what is ur CNG mileage.........

[as2d]

@ thunderRider

my vitz 2003 model give me avereage on CNG Rs.1.90 per Kilometer on motorway. and local use Rs.3 per kilometer.