bad o2 sensor orrrrr?

[Akeeg4]

I got a cel for running lean, so I plug in my laptop and open kmanager. I do a quick data log and it shows I'm running 30:1. obviously that's not an acurate reading. Does that mean my o2 sensor is bad, or something else?

[superchargedk20]

I got a cel for running lean, so I plug in my laptop and open kmanager. I do a quick data log and it shows I'm running 30:1. obviously that's not an acurate reading. Does that mean my o2 sensor is bad, or something else?

Yea. I had that. Sensor stuck in lean. IT was something like that. Needed a new primary solved my problem. If i would go WOT car would run normal. But at part throttle was when it would be stuck in lean

[talonXracer]

Sounds like your front o2 sensor(A/F sensor) is shot.


At WOT the ECU is in open loop, not utilizing the sensors and is running entirely off the calibration + long term fuel trim. The o2 sensors are only used during part throttle operation.

[Jrw]

i have a similar problem and i bought a new primary 02 and mine is stuck at 14.1 all the time?