P0137 GMC - 02 sensor circuit low voltage bank 1

Question

My check engine light is on and flashing, limited pick up power
runs rough, and stalls. Are all these symptons of the 02 sensor?
Thanks, please let me know

Answer 1

Hi there,

These are not typical symptoms of a faulty O2 sensor. The code may be a result of the rough running. Normally a flashing check engine light indicates there is a problem with the ignition system and a misfire on one or more of the cylinders. This may be a faulty ignition coil or spark plug wire.