Having problems with your 2001 Buick Regal ?

Check engine light on. Code P0440.

\015 Check engine light on, Code P0440. Dealer said thermostate was the problem. He replaced Thermostat $160 and light came back on after 100 miles. Code still P0440, 2002 Buick Regal.\015 Posted / edited by AnonymousUser on : 30-03-2020

Answers :

Wow thermostat >>>> shucks i believe its evep emissions code like faulty gas cap ....you can reset any computer the chck eng light will come on in 50 to 100 miles if not fixed....
I have the same problem. The check engine light comes on when the tank goes to 3/4 or less, if I keep it full it eventually shuts off. I tried a new gas cap but it didn't help.
Repair Help & Product Troubleshooting for 2001 Buick Regal

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