On (would be for) 88 325i 4 wire o2 sensor. What is the cycle voltage range? 0-1 or something different. I noticed the car had more power and was using more fuel (staying in open loop), and sure enough it threw a code for o2 sensor. I tested for cycle voltage and got a reading, but it was too high indicating very rich according to the normal cycle range.
If the sensor is bad, I wonder if I can use an o2 from my old eta setup. Its new and only has 3 wires, but do I really need the heater?
If the sensor is bad, I wonder if I can use an o2 from my old eta setup. Its new and only has 3 wires, but do I really need the heater?
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