2017 Buick Lacrosse

[kadenjate2]

I see an intermittent message "Service Transmission" on my 2017 Lacrosse with 66k miles on it. There is no "check engine light," and this message usually appears when I park the vehicle or put it in neutral.

I scanned with the OBD2 tool, and the code is P07BB, "Transmission Park Position Sensor/Switch "B" Circuit Performance/Low."

 

[greg12]

My wife's 2018 had that a couple of times and I noticed stop-start stopped working. A new battery under warranty took care of it.

 

[MelsRegal]

See the causes and solutions

P07BB Transmission Park Position Sensor/Switch B Circuit Performance Low

How to easily diagnose, repair, and info on causes of a trouble code P07BB that indicates a low performing circuit in the B transmission park position sensor circuit.

www.obd-codes.com