P0137 code, yep researched it, need some help.

[96mn12]

Hey Guys,

car has the GS Downpipe and the big daddies angled cel fix. 21K miles, 2008 2.0T. Have had this rig in for several months, a few weeks ago it threw the CEL once. Unplugged battery and everything was fine. 4-5 days without the light until this morning when it threw it again.

P0137 is the bank1 sensor2 o2 sensor (post-cat). Error says circuit low voltage.

I checked the battery at autozone and it tested good (for a 3 year old battery).

Any ideas?

Thanks everyone!

[jlrSAAB]

first check the connector in the wiring harness....

to resume you can find the possible causes, symptoms..of O2 sensor. here attached post:
OBDII Code P0137 SUBARU - O2 Sensor Circuit Low Voltage | Engine-Codes.com
Diagnostic Trouble Code (DTC) P0137 Rear Heated Oxygen Sensor Low Voltage