Dtc P1131 & P1151
Hello all, I pulled two trouble codes.
DTC P1131 - Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1
DTC P1151 - Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 2
Ironcially I had my upstream O2 sensors replaced about 2K miles ago after I got my truck custom tuned.
Anyone have any ideas why they would be causing an error? It's dark and cold out now so I haven't physically looked at the sensors but I'll take a look tomorrow. My gas mileage has also gotten significanlty worse.
Thanks in advance.
Last edited by ChrisT; 12-07-2006 at 09:14 PM.