2004 Buick rendezvous - po137

Question

my 2004 buick rendezvous is giving a code Po137 02 circuit low voltage ( bank 1, sensor 2 )
what does this mean ? where do I look for it

Answer 1

Hi there,

This code is pointing to the rear bank towards the firewall and the second O2 sensor, the one AFTER the catalytic converter. usually the sensor itself is the source of the code and the problem. Normally replacing it will resolve the low voltage issue.