B Bobcat2017 New member Joined Mar 4, 2020 Messages 4 Reaction score 0 Points 1 Buick Ownership Regal Aug 11, 2025 #1 Howdy folks. Is it normal for the #1 O2 Sensor to read like this? It swings between 0.1-0.8V while the #2 remains pretty consistent at 0.7V. Tried varying tachometer reading up to 3000 RPMs but made no difference.
Howdy folks. Is it normal for the #1 O2 Sensor to read like this? It swings between 0.1-0.8V while the #2 remains pretty consistent at 0.7V. Tried varying tachometer reading up to 3000 RPMs but made no difference.
O OB1 Active member Joined Apr 2, 2019 Messages 366 Reaction score 98 Points 28 Location Warren,Michigan Buick Ownership 14 Buick Regal GS Aug 12, 2025 #2 replace it