Evaporative emission control system / Vent control circuit malfunction. Don't ask me how to fix it, I got this from the Haynes Repair Manual.
The code PO441 means that the vehicle has an incorrect purge flow. The code PO446 is for the vsv vapor pressure sensor.
Check your charcoal fuel canister. I had the same problem changed the light went out. The problem fixed.
Google the code and you will have the answer.
what does rfa 1 mean on a chevy colorado dashboard
Evaporative Emission Control system vent control Circuit po446 code
PO446 code isÊa diagnostic code for Evaporative Emission Control System Vent Control Circuit.Ê The most common fix for this code is to replace the gas cap and make sure it is turned till you hear a click.
po446 is a large evap. system leak some times cause by leaving vehicle running while fueling up, or leaving cap off or loose after gassing up.
P0128- coolant thermostat ( coolant temp below regulated temp)
Remove the negative battery cable for 6 minutes and then replace.
The Chevy Colorado came out in 2004
You must use a Diagnostic code scanner that can erase trouble codes.
02 sensor circuit, no activity detected (sensor 1)