Will faulty oxygen sensor make a car not start?

An oxygen sensor is a device that measures the amount of oxygen in the exhaust gas of an internal combustion engine. It is used by the engine control unit (ECU) to adjust the air-fuel mixture to maintain the proper stoichiometric ratio. A faulty oxygen sensor can cause the engine to run rich or lean, which can lead to a number of problems, including:

* Increased fuel consumption

* Reduced power output

* Rough idling

* Stalling

* Check engine light

In most cases, a faulty oxygen sensor will not prevent the car from starting. However, in some cases, a faulty oxygen sensor can cause the ECU to go into limp mode, which will limit the engine's performance and may prevent it from starting.

If you are experiencing problems starting your car, it is important to have it diagnosed by a qualified mechanic. A faulty oxygen sensor is one of many possible causes of this problem, and it is important to identify the root cause in order to get your car running smoothly again.