tried removing battery terminals.. tying adding a silencer with that pipe for back pressure aswell.. but no use.. i have installed genuine fitting with sensor and silencer.. and removed the last one silencer and put on exhuast over there.. sound is reduced to some extent but now my car is still having cheklite but not permanent.. it comes randomly... and some times car gets rough like choked... ive got it checked.. nd they say put on ur genuine exaust fitting back ant throw away this muffler... i wasted my money.. nd thats frustrating situation that i could only use it as a silencer tip...