2004 Z71 1500, 170k
Cruising around on the highway I popped a P0420. Truck behavior sometimes acts sluggish, other times not, but idle is smooth. I plan to swap #2 sensors, but rust is strong, so while the pb blaster soaks in, I wanted to see if anyone had an idea about my sensor readings. Using Torque, I have monitored the read outs today. O2 sensor 1x2 reads an almost constant 0.7v while 2x2 is 0.1v. The other oddity is the fuel trim. Bank 1 seems to be richer by close to a factor of 2. At idle bank 1 has a LTFT of -2.5ish while bank 2 is -5 ish. You can see the same behavior is STFT readings too.
Mileage isn?t horrible, average is 13.7 on 33s. Does the fuel trim reading mean anything? Until I swap the #2 sensors, I can?t rule out a sensor issue, but that wouldn?t explain the fuel trim.
What are your thoughts?
Cruising around on the highway I popped a P0420. Truck behavior sometimes acts sluggish, other times not, but idle is smooth. I plan to swap #2 sensors, but rust is strong, so while the pb blaster soaks in, I wanted to see if anyone had an idea about my sensor readings. Using Torque, I have monitored the read outs today. O2 sensor 1x2 reads an almost constant 0.7v while 2x2 is 0.1v. The other oddity is the fuel trim. Bank 1 seems to be richer by close to a factor of 2. At idle bank 1 has a LTFT of -2.5ish while bank 2 is -5 ish. You can see the same behavior is STFT readings too.
Mileage isn?t horrible, average is 13.7 on 33s. Does the fuel trim reading mean anything? Until I swap the #2 sensors, I can?t rule out a sensor issue, but that wouldn?t explain the fuel trim.
What are your thoughts?