CEL on Code P1400

[PN0Y BLACKW1NG]

Noticed a CEL this morning and downloaded a P1400 code. Quick google searches lead me to Differential exhaust pressure or the sensor. Any seasoned caddy owners know more or seen this? I bought my 22 ct4 bw used and to my knowledge no modifications done to it. It was a GM buyback for engine oil consumption which they replaced the engine. Any help is greatly appreciated!

 

[MookdocOE]

Could be anything? Take it back under warranty and have them tell you what it is?

 

[PN0Y BLACKW1NG]

Yup, taking it into the dealer Tuesday was hoping to hear it may be just a faulty sensor or something. Thansk for the help

 

[CBH]

Brave adventure buying a known replaced motor. OTOH, probably a great car at a great price.

It's interesting to see the 2nd owners showing up on the forum now.

Best of luck !!

Keep us posted on progress......