Hi.Right/left is a bit confusing when it comes to these sensors, but what I ment is the left ones when standing in front of the car, P1155 is the code for the left ones after what I understand. I think I have replaced/swapped all four of the sensors now, but they are not Denco originals, just 4 wire universals. I see now that there is difference between upper and lover sensors, maybe thats my problem? Resistance is about 14 ohm on all.