Empower Your Engine Understanding Bank 1 Sensor 1 O2

C63 AMG (W204) - Bad oxygen sensor bank 1, sensor 1??? - Car threw a check engine light and the error says o2 bank 1 sensor 1 is bad. I have a 2012 Ford Focus SEL and there's a code (P0131) O2 sensor circuit low voltage bank 1 sensor 1. I replaced the O2 sensor (Bank 1 Sensor 1) assuming it ... Sensor one in front of cat converter switches between 250 mv and 700 mv about 40 tines a second as each cylinder fires at 600 RPM idle. I replace the primary O2, reset the CEL, and about 40 miles later it pops up again. And again it is popping two Bank 1 Sensor 1 codes. Same code, just twice. Sensors 1 are the upper oxygen sensors and they are located before the catalytic converters. Sensors 2 are the lower oxygen sensors and they are located past ... ... Year Warranty. 5.0. (1). 5.0 out of 5 stars. 1 review. Check if this fits your vehicle. Select store for pickup availability. Standard ... The harness rubbed on the fender line and broke one of the wires. I hit one of the non-broken wires with electrical tape and proceeded home. Here you can find a picture of the location for a Bank 1 Sensor 2, the wiring goes into the interior through a grommet, with the connector under ... What Does the Code P0130 Mean? · Vacuum leak at the engine · Holes in the exhaust · Water or corrosion in the connector · An open or short · Burnt wiring on the ... However, it is not very specific as to whether this is bank 1 or bank 2, and given that these are pretty expensive for the pre-cat sensors, would rather only ...