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I can't find any information on 7 wire AFR sensors on the Web in general, but I think that it probably must be a wide band AFR sensor.
This is just an educated guess but I think it is likely that:
2 wires are for the current driven o2 pump
2 wires are for the AFR voltage + and -
2 wires are for the heater
1 wire is for ground
Or I could be completely wrong and it's not an AFR sensor at all
Can you post a detailed picture of it?
Also keep in mind that a P0155 might not be the fault of the sensor.
It could be a blown fuse, broken or shorted wire, bad socket connection.
Last edit: 5 years 7 months ago by hakachukai. Reason: Adding detail
The following user(s) said Thank You: aboudi.naddaf
It turns out that 7 wire AF sensors do exist. If I understand correctly, they are just basically 5 wire AF sensors with the calibration resistor put on it's own 2 separate pins
The following user(s) said Thank You: aboudi.naddaf
It turns out that 7 wire AF sensors do exist. If I understand correctly, they are just basically 5 wire AF sensors with the calibration resistor put on it's own 2 separate pins
yes, this car does appear to have the calibration resistor, but is pig tailed/spliced off the o2 sensor. I can only go by the wiring diagram, but it shows only 6 wires coming off the sensor itself. diagram could very well be wrong. would like to see a picture of this car sensor in question to verify for sure
The following user(s) said Thank You: aboudi.naddaf
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