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O2 sensor...Possible Fix

Sorry I took so long to reply, but I did have an exhaust leak at the flange right after the bank 2 cat. Fixed the leak and now bank 2 sensor 2 fluctuates like the rest of the sensors at around 0.100 to 0.800. It still goes down low like it was at 0.050 but it goes right back up and fluctuates...
- Fatboy554
- Post #4
- Aug 25, 2023
- Forum: Engine Performance + Maintenance
F
O2 sensor...Possible Fix

I have a 1999 GMC Yukon 5.7 4WD and I'm getting a P0157 code which is bank 2 sensor 2 low voltage. I've replaced the sensor and still the same thing. The voltage fluctuates between 0.005 volts to 0.050 volts, sometimes it goes up to 0.080 volts. Now I'm thinking it might be a short somewhere in...
- Fatboy554
- Thread
- Aug 19, 2023
- o2 sensor p0157
- Replies: 4
- Forum: Engine Performance + Maintenance