Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
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: 6 years 2 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
Topic Author
