troubleshoot

I installed this product as described in the instructions. Red wire to 12v constant, brown wire to key on 12v, black wire to ground and purple wire spliced into black wire on O2 Sensor cable. The unit does not work. When I disconnect the unit the backlight will flash for a split second and turn...

Need some advice on how to go about fixing this issue. I am getting codes 116 & 114 also but I think that is due to checking while the engine was cold. Getting code 998 as well which I think means the truck is running in default mode. Truck started cranking sluggish and if it is REALLY cold...

Hello everyone. I'm having problems with my 97 ranger running rich. It has the 4.0 ohc engine with a 5 speed rwd. It's throwing the following codes: p1132, p1152, p0135, p0141, and p0155. They indicate heater circuit malfunction on all three o2 sensors and that both banks are running rich...