check the oil stick in case ur cars gasket is dead and the waters mixing with oil.
Im not sure what is a 101 Advancer, But yes the cng advancer was powered with the crank sensors wiring due to which my cars wiring screwed and the sensor stoped working.
After that i thot it CNG that made the check light on so i didnt bothered. i didnt bothered much as it was driving fine on CNG and there was some missing on Petrol.
After some time cng started having issues (advancer died) i tuk my car to the cng mechanic he said ur car isnt stabble on Petrol unless thats fixed. the car cannot be set on CNG.
After working alot finaly i tuk my car to khan motors they plugged in the OBD scanner and the scanner told us that the sensor wasnt working.
Got that fixed missing issue resolved. Went to the cng mechaninc again
Got a new advancer installed. this advancer was installed on maf/map sensor wiring and costed Rs2500.
The advancer that is installed on the calm shaft senor costed around 9k.