P0304 : cylinder number 4 misfire.
Trouble code P0304 means:Cylinder 4 misfire detected
Trouble code P0304 means: Cylinder 4 Misfire Detected
The abs computer has detected a malfunction and set a code.
Trouble code P1684 means:The battery has been disconnected within the last 50 starts
P0172 System too Rich (Bank 1)
OBD code P0304 is Cylinder Four Misfire.
replace spark plugs @wires
get code from dealer
Trouble code P0304 means:Cylinder 4 misfire detected
You purchase a $8,000.00 computer and press "erase codes." If the light comes back on, which I am sure it will, then you repair the problem. Then you erase the code again.
Here is a good site for decoding error codes. Specifically this error code of P0304.http://www.obd-codes.com/p0304
Trouble code P0304 means:Cylinder 4 misfire detected