What is correct ressistance for o2 sensor heater? I got CEL with code p0141 - O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2). Than I replaced rear o2 sensor with new Denso DoX-0119 but problem is still there. I measured heater resistance and it is 7 ohms. Everything looks fine, sensor working properly, I see readings via obd2. It is almost straight line and going between 0.2 - 0.8V.