[johnnickerson]

How do I fix Chevrolet Impala 2006, 3.5L engine, that is getting the error code B0238?

 

[Revo2Maxx2016]

Sadly it sounds like a EVAP or issue that could be Related to cold weather starting. I would say the car is having a issue with knowing the right Temp so it can make adjustment by the computers. Could be an Injector issue related to cold starts....

I would take it to Chevy or a good Shop and have them track down the issue... Hard to say where to pinpoint this problem...

Sorry wasn't much help
James