P0136 = O2 circuit [Bank1, sensor 2]
P0137 = O2 circuit low voltage [Bank1, sensor2]
For the P0137 code, my scanner had….
Fuel Sys 1 CL
Calc LOAD(%) 7.8
ECT(F) 194
STFT B1 (%) 0
LTFT B1 (%) -25.0
I replaced the downstream (under car) O2 sensor with a genuine, new AC Delco part about 2 years ago after I was getting the P0137 code. A few months ago I started getting P0136 and P0137 codes. Could that sensor have gone bad that fast ? I have been clearing the codes in hopes that the long highway drives I have been doing would clear things up. Fat Chance !! Any ideas on how to troubleshoot what’s going on or should I just buy another sensor and put it in…. I don’t recall ever changing the upstream sensor. Could that have anything to do with it ? Thanks…
