Skip the auto shop - Our mechanics make house calls

Q: Would a failing oxygen sensor cause lack of power and shifting problems?

asked by on

Sometimes taking off in first gear it feels like the car is lacking power. Also when it gets into 4th gear it will run at about 3000 rpms at first then drop right down to 2000. Yes i am sure it is both 4th gear. Im wonering if this could have anything to do with the O2 sensor that is bad

My car has 148240 miles.
My car has an automatic transmission.

A: As you may know, the oxygen sensors, which ...

As you may know, the oxygen sensors, which are part of your emission’s system, 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 the 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, which 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. Any of the above conditions may cause inaccurate shifting points to be made by your car’s transmission control module. I would suggest having an expert, such as one from YourMechanic, come to your home to diagnose your emissions system and replace the oxygen sensor if needed.

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: Help my car wont move but will start it makes a grinding metal noise when trying to go in gear

Sounds like the input shaft on your transmission has broke when the vehicle went into gear. I recommend seeking out a professional, such as one from Your Mechanic, to help you diagnose your transmission noise.

Q: Rock knocked out my AC, is it bad quality?

Honda knows about this condition on the Odyssey model (along with other models) and there is plenty of evidence on this issue. The issue is that a small rock (pebble) is able penetrate the front grille at a sufficient speed...

Q: Engine misfiring - 1996 BMW 750iL

Your BMW should have OBD II diagnostics (based on your model year), and this fault should illuminate the "Check Engine" light on the dash. Have a professional mechanic like a certified technician from YourMechanic inspect your vehicle for wiring issues...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.