Been having a ongoing problem with this P0134 code(B1,S1). The first time i got this code along with a P0130 i replaced the B1S1 sensor as noted. Got the code reset but it came back soon after. I did have some exhaust leaks that were patched up. Its seems as if the leaks are fixed because i don't hear them anymore like before. Still getting P0134. Something related to the circuit activity. Anyone know where the fuse related to that 02 sensor is located? I did a voltage check for the 02 sensor at the connector inside the car and all checked out normal(voltage,ohm). Reset and still code pops up. Gas mileage is slightly down also. What am i missing? Overlooked leak, faulty new sensor? I'm at a loss. I was also wondering how could leaks after the main cats cause a pre-cat code if it is exhaust leak related?

 

Wires and connectors have a good continuity check?

- Faulty Front Heated Oxygen Sensor Bank 1
- Front Heated Oxygen Sensor Bank 1 harness is open or shorted
- Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

LINK: http://engine-codes.com/p0134_lexus.html