Hi, My check engine light went on and my temp guage is stuck on cold on my 2003 Grand marquis. Blowers work a little but not warm air..Not overheating. Maybe a sensor? Thermostat stuck open? Any ideas before I have some tech plug in and diagnose for me?

 

Hello guys! I am rick and have just joined this forum.Thanks for making me a part of this place.

 

Your rear O2 sensor needs replacing, P0136 and P0135 it is located under the middle of the car and pluggs in under the drivers seat. The small Evap leak code P0440,and P0446 And the charcoal canister vent control valve can cause both of those codes.