Motor control sysyem failure P0139 and P0141 bank 1 sensor 2
I'm having trouble deciding what to do about the fault codes I'm getting. The car is a 02 156 1.6 sportivo. When the codes are cleared they stay cleared for about 10-20 minutes driving if statred from cold. If I clear them when the car is hot the codes do not return until the car has cooled down and is stated from cold again, then after about 10-20 minutes they are back on again. Does anybody know if where the cause of this problem lies? Is it actually the sensor itself or is the problem elsewhere? also which sensor is bank 1 sensor 2? is that one of the sensor situated just below the manifold, one at either side? P0139 slow response, and P0141 is a probem with the heater circuit. Both fault codes are from the same sensor!
Thanks for any help anyone can give!