O2 Sensor Stuck Reading 1.108V
Thread Starter
Teching In
Joined: Jun 2021
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O2 Sensor Stuck Reading 1.108V Noticed '02 Z28 was running terrible recently, HP tuners shows me that an O2 sensor (B2S1, passenger front) is reading 1.108 volts no matter what, so it's pulling over half of the fuel trying to trim. Nothing changed when I swapped it with the post-cat sensor. Has anybody seen this happen before? I would rather not force it into open loop for the rest of its life.
Thread Starter
Teching In
Joined: Jun 2021
Posts: 5
Likes: 0
Thread Starter
Teching In
Joined: Jun 2021
Posts: 5
Likes: 0
Honestly I still have no idea what the problem was. It kept reading bad at random (as opposed to constantly before) for a few miles after that and now it's working consistently. I think it might have actually been running super rich but I also think I would've been able to tell if I was sending enough unburnt fuel into the exhaust to max out the O2 sensor.
