Hi Everyone, This question is regarding a friend's car. Any help would be appreciated. The car in discussion is a Suzuki swift 2011 DX 58000 driven only. The car has a CNG installed aswell and it is driven on CNG aswell half of the time. The check engine light if the car has come on since last couple of days. He took it to a mechanic and he said it's because of CNG kit, Any alteration in efi car's enable this check engine light. Is this correct? he has not got the car diagnosed yet. The engine sound fine. The car is maintained timely oil changed. He is a bit worried. He was thinking to remove CNG if that is really the issue. What can be the issue in expert opinions. He is the second owner of the car and CNG was installed before.
