Ken Finne 10/2/2012
2001 Hyundai Elantra GLS 4 Cyl 2.0L
Check engine light is on
Heater circuit sensor 1 bank 1, what is the danger of driving with a faulty oxygen sensor?
The oxygen sensors supply the computer with a signal that indicates a rich or lean condition during engine operation. This input information assists the computer in determining the proper air/fuel ratio. A low voltage signal from one or more sensors indicates too much oxygen in the exhaust (lean condition) and, conversely, a high voltage signal indicates too little oxygen in the exhaust (rich condition). The oxygen sensors are threaded into the exhaust manifold and/or exhaust pipes on all vehicles. Heated oxygen sensors are used on all models to allow the engine to reach the closed loop faster.