ekidd

iTrader: (25)

Ive had my check engine light constantly turn on and its getting pretty annoying. Ive reseted my ecu numerous times and the check engine light still turns on after about 50 miles max. I had scanned my car to see what the problem was the scanner said it was an air fuel meter sensor? Anyone know which sensor this is in particular or have a picture of it so i can solve the problem on my own? Any input would be greatly appreciated.

Tim@WestCovinaNissan

The a/f sensor screws into the exhaust manifold. Also known as the front o2 sensor.

davidv

iTrader: (2)

The mixture ratio signal comes from heated oxygen sensors #1. The ECM calculates the proper air:fuel ratio. If the mixture is too lean, ECM will give a fuel injection system malfunction.

ekidd

iTrader: (25)

you guys are the best. So would that mean my first o2 sensor is seized or something? Im not quite understanding why i would be having this code. If it helps or has anything to do with it, my mods are 5/16 iso spacer, pop charger, resonated tp's with non fouler fix, and a catback...all on an o4.5. So how would i solve this problem of running to lean to make the code go away? Or how would i solve this problem at all? Just buy a new o2?

davidv

iTrader: (2)

Troubleshooting the ECM can be an expensive headache:

You get a code.
Replace the part associated with the code.
Run the motor and get and different code.

Heated oxygen sensor (not sure which bank) is a common problem. But no one can say with certainty that a new sensor is the fix.

ekidd

iTrader: (25)

is there any idea of what could have caused the problem???? or any kind of common factor that people usually have that cause this code to happen??

ekidd

iTrader: (25)

anyone else have anymore input on this?

jason7467

iTrader: (1)

Did you check you cat converters where the sensor is and see if anything is wrong, exposed wires, loose o2 sensor, ect i have seen a few Z's that must have bottomed out and had those wires cut up and exposed. Do you have the orginal cats or are they aftermarket?