Grey with black head
nitrous oxide cylinders are blue
To open the valve on an oxygen cylinder, you turn the valve.
it regulate the oxygen pressure
oxygen it has no colour, taste or smell.
CLEAR
Black
halothane : red
green
nitrous oxide cylinders are blue
c h y 6 6 6
Code P0135 means upstream oxygen sensor heater circuit problem right cylinder bank. Did you clear code after replacing the oxygen sensor?
Oxygen sensor heater malfunction (cylinder bank #2, sensor #1)
Check your oxygen sensor.
oxygen has no colour
Gas
To open the valve on an oxygen cylinder, you turn the valve.
red