U0101 Cadillac - 2005 cts

Question

2 codes are present: U0101 & P0522. Are they related & what can cause these codes to happen ?
Rick

Answer 1

U0101 Lost communication with transmission control module

P0522 Engine oil pressure sensor circuit low voltage

P0522 is very common on GM vehicles, As long as the oil pressure is good and not at fault, it just the oil pressure sensor. P0522 can also be set due to low oil, Even wrong oil filter can cause this code to set.As for U0101 This is usaully accompanied by a transmission trouble code, If U0101 is the code you have with no other beside P0522. Check the charging system . and battery condition.