Q: Does replacing the upstream oxygen sensor with a different brand as the down stream cause the engine to throw more codes?

asked by on October 10, 2016

I replaced my upstream oxygen sensor with a Denso brand while the downstream is still the factory installed oxygen sensor. Does this cause the computer to emit codes cause the sensors are different?

My car has 184000 miles.
My car has a manual transmission.

Check Engine Light is on Inspection $94.99 - $114.99 Get a Quote

Hi, thanks for writing in. This should not affect the functionality of the O2 sensors, as long as the replacement sensor is in fact the correct part for your application. If your car continues to produce fault codes, consider having an expert automotive technician from YourMechanic come to your home or office to inspect these codes for you, and make or suggest any repairs as needed.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Thermostat problems
There are a few common causes for the AC blowing hot air (https://www.yourmechanic.com/article/why-won-t-my-ac-blow-cold-air), the most common is that the vehicle is low on refrigerant, other causes could be the blend motor has failed or the compressor is not working properly....
i have a nissan micra k11 which wont start
Hi there. I would recommend checking all of the fuses (https://www.yourmechanic.com/article/how-to-check-fuses-by-rocco-lovetere) under the dashboard. There should be several fuses in a box, one of which will be a 15 amp fuse that is responsible for the dashboard lights. If any...
Air conditioner blowing warm air. Heat blowing warm air. Neither hot or cold
If the A/C system is full and pressures are reading correctly, and the cooling system is in proper working order (thermostat opens, no overheating, etc.), then most likely the problem lies with the dash. The climate control head unit may...
My car won't start. It tries to turn over but won't.
Hi, thanks for writing in. Your battery (https://www.yourmechanic.com/article/how-to-buy-a-good-quality-car-battery) may need to be replaced. If you don't have the right about of Cold Cranking Amps your vehicle will fail to start. There is no way to check this though. Also, your...
Why would my 2003 Chevrolet Impala stall and now it runs rough.
Hello. Though there are a lot of things that can cause this typically it is due to an issue with a failure in a spark plug or an ignition coil failure. If there is not a check engine light on...
My SUV makes a groaning noise when shifting gears.
Hi C.F. Theoretically, it could be both a brake or transmission problem. It could also be due to a wheel bearing wearing out. Typically a brake grinding issue will occur when the vehicle is slowing (in forward or reverse). The...
where can i find a serivce and repair manual for my 2012 chevrolet captiva?
The Shop Manuals are vended by the OEM dealers. Your best bet is to just visit the Parts Department of any GM dealer and they can order a copy for you. Factory Shop Manuals are also sold on websites such...
Power steering Belt is the same for the Alternator ?
The belts for power steering to a/c compressor is different from the belt for the alternator. They are different sizes also. Your engine has two serpentine belts.

Related articles

What Happens to Sensors if They are Dirty?
Car sensors can get dirty with normal use. Symptoms of dirty sensors include reduced engine power, worse gas mileage, or an engine that hesitates.
Pontiac Certified Pre-Owned (CPO) Car Program
If If you’re in the market for a used Pontiac vehicle, you may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on...
How to Replace an Air Fuel Ratio Sensor
The air fuel ratio sensor fails within a vehicle if the check engine light comes on. Poor engine performance results from oxygen sensor failure.