Trouble code P1416 means: AIR System Bank 2
Trouble code P0304 means: Cylinder 4 Misfire Detected
Look for a leak in the port-side vacuum.
With an OBD2 scan tool.
I have the check engine light on and the code is for map sensor on my 1999 1500 Chevy suburban
Trouble code P0430 means:Catalyst system efficiency below threshold
to live in the city
Trouble code P0135 means:O2 sensor heater circuit malfunction (bank 1,sensor 1)
285 hp if it has the lm engine code z 295 hp
Trouble code P1345 means: Camshaft To Crankshaft Position Correlation Fault
You need to have it checked for codes to know what the cause of the code is.
P1416 is your O2 censors. ANSWER: P1416 refers to a problem in the exhaust system which is, unfortunately, very difficult to track down. Depending on who you talk to about it, you can do nothing and never have a problem or you can do nothing and it can ultimately lead to a problem with the catalytic converter. Damned if you do and damned if you don't.