Skip the auto shop - Our mechanics make house calls

Q: O2 sensor

asked by on

What kind of problems will it cause if I'm not repairing anytime soon?

My car has 119790 miles.
My car has an automatic transmission.

The oxygen sensors are part of your emissions system and read exhaust gases to determine whether or not the appropriate amount of oxygen is present in the exhaust. Based upon this reading, this information is relayed to the car’s ECU which then makes a determination as to whether or not to add more or less fuel to the engine. When too much or too little oxygen is present, this will cause check engine light to come on. Too much oxygen may be present in the exhaust gas due to things like an exhaust leak, a vacuum leak, a faulty mass air flow sensor (causing a lean fuel condition) or faulty fuel injectors. Too little oxygen may be present in the exhaust gas may be caused by things like a clogged air filter, a failing mass air flow sensor (causing too much fuel to be introduced to the motor), bad fuel injectors or a clogged catalytic converter. When the O2 sensor is not working properly, this will cause false readings to be relayed to the computer causing inaccurate adjustments to be made to the intake and fuel system in your engine. You may also notice a very strong smell of fuel and poor fuel mileage. I would suggest having an expert from Your Mechanic come to your home to diagnose your emissions system.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine light on

In most cases, the P-0137 error code is related to the oxygen sensors on the vehicle. There are typically two to four oxygen sensors on the four cylinder Toyota motor, so a more detailed diagnostic scan should indicate which one...

Q: Should I replace the AC pressure switch?

Hi there. Has the system been charged recently? If so, there could be too much refrigerant in the system causing the pressure valve to vent the excess pressure; the high pressure sensor is there to prevent catastrophic system failure and...

Q: Signs of a bad transmission 2011 Acura mdx

Hello and thank you for contacting Your Mechanic. It sounds like the battery is failing in your vehicle. The battery can be drained of power, but also the battery can be over charged. If the battery was to have an...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...