Why Replace A Faulty Oxygen Sensor? A faulty sensor cannot transmit accurate data to the car's computer, causing the engine to run unbalanced. An unbalanced engine either burns fuel with too much or ...

I had a test done at local auto-parts store that showed a code of PO138. They told me this indicates a problem with the oxygen sensor. I replaced the oxygen sensor and the light never went out. I ...

Stricter environmental controls and the requirement to create less pollution has led to far more complex automotive exhaust systems. One component of these systems is the oxygen sensor or Lambda ...

Q: I would like to know when it is necessary to change O2 sensors. I have a Chevy Malibu 2001. Also, if these sensors are to be replaced, why are they so hard to take off? They seems welded to the ...

Discover how a dirty oxygen sensor, old coolant, and worn spark plugs can increase fuel consumption. Practical tips from ...

Your engine needs a steady stream of clean air to function properly, and it's the job of the mass air flow (MAF) sensor to measure and regulate the amount of clean air entering the intake. The engine ...

It started the way so many modern car problems do: one tiny warning light and a code that sounded like it came from a robot’s diary. The fix seemed straightforward—replace a sensor, clear the code, ...