O2 sensor

lanos rider · Post by **lanos rider** » Fri Jun 24, 2005 12:31 pm

hay guy's i wanna ask will it couse any harm if i unpluged the o2 sensor

MMamdouh · Post by **MMamdouh** » Fri Jun 24, 2005 2:01 pm

probably will trigger a CEL and the ECU will switch to a fail safe mode and your engine will run like crap.

why do you want to do that anyways??

MMamdouh

tango · Post by **tango** » Sat Jun 25, 2005 4:58 am

If I disconnect my oxygen sensor I get a CEL when at higher rpm but I've never seen it while driving around normally.

MMamdouh · Post by **MMamdouh** » Sun Jun 26, 2005 8:55 am

i disconnected mine during engine idling and i got no CEL... didn't leave it long enough to see what will happen though.

MMamdouh

lanos rider · Post by **lanos rider** » Sun Jun 26, 2005 7:09 pm

the engine is not running smoothly at all but the thing is when i drive on a constant speed for a while and stop again the engine stops and when i try to run it again it wont run unless i unpluge the o2 sensor

tango · Post by **tango** » Sun Jun 26, 2005 7:53 pm

Sounds like you have a bad O2 sensor circuit. It may be the sensor itself or the circuit leading to it. How old is the car? Have you ever had a blown cylinder-head gasket?

MMamdouh · Post by **MMamdouh** » Mon Jun 27, 2005 12:19 am

get the car scanned... you might not have a CEL but the scanner can read the sensors output values and if the technican doing that is good enough he will know if the O2 sensor's readings are off.

my mechanic did that when diagnosing my bad injectors, he said it is eather bad injectors or bad O2 sensor (i didn't have CEL)... the sensor's readings were OK on the scan tool so we confirmed the bad injectors diagnosis.

MMamdouh

lanos rider · Post by **lanos rider** » Mon Jun 27, 2005 12:17 pm

the model of the car is 1999 i have never had a blown cylinder-head gasket but 2 month ago when i changed the timeing belt the mechanic told me that the o2 sensor is half damged