Q: Just got both o2 sensors on my car changed but when I went to autozone the same code keep popping up. What should I do?

asked by on March 21, 2018

I replaced both o2 sensors on my 3.8 engine and the code still pops up what should I do ? What could be the problem ? Those are the only codes that pop up & I need to pass my admission text in a few days .

My car has 206900 miles.
My car's transmission is unknown to me.

Check Engine Light is on Inspection $79.99 - $89.99 Get a Quote

OBD-II trouble codes, including all codes that refer to oxygen sensors, do not constitute a diagnostic or identification of specific failed parts. Consequently, you cannot use the codes as the sole basis to replace vehicle parts. Codes are clues only. To determine if the oxygen sensor is actually the cause of a code setting, versus a situation where perhaps the circuit (the vehicle wiring) to or from the sensor is the actual fault, the output of the sensor MUST be tested using an appropriate automotive scanner or diagnostic tool such as an oscilloscope. If that required diagnostic was not performed, the sensor that was replaced might have been perfectly good, while the actual root cause of the fault exists elsewhere in the circuit and possibly in a wholly unrelated vehicle system. No vehicle part should ever be replaced just because the part is referred to, listed, or mentioned in a code. In your circumstance, to get the code that was stored, and that is causing the check engine light to remain on, investigated and resolved, the recommended service is a Check Engine Light diagnostic. If you request that service, a certified mechanic from YourMechanic will download the trouble code (to confirm it, but also to obtain the accompanying freeze frame data that is stored in the vehicle computer) and then test the relevant individual vehicle components and systems to pinpoint the cause of the fault. Once the EXACT cause of the fault is pinpointed, the mechanic will let you know what, if any, parts must be replaced, why, and at what cost. If you request the Check Engine Light diagnostic, the responding certified mechanic will get this diagnosed and resolved promptly, right at your location. If you have further questions or concerns, do not hesitate to re-contact YourMechanic because we want you to make the most of your repair dollars and help you to get the best possible results.

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

What others are asking

im working on a 2005 chrysler with a 2.7. i keep getting a p0016 timing misalignment. i have retimed it twice. changed the sensors

Try checking and updating the computer program with the latest calibration. There is a bulletin for P0340 and should cover P0016 also. If after reprogramming the PCM and then road test to see if code returns. There has been problems...

High beams come on whenever I use my right turn signal 2008 Pontiac Grand Prix

The problem is caused by a short in the turn signal switch. Replace the turn signal switch.

how much for a crankshaft positioning sensor and also how much to have a mechanic put one in

Hi there: Before you have one of our mobile mechanics replace the crankshaft position sensor, you should have them complete a full check engine light inspection first. It's possible that the code being displayed on your code reader is caused...

vibration and shaking at idle. also very loud and noisy engine. replaced all motor mounts, spark plug components, and intake syste

Often noise is related to exhaust system leaks or internal failures in the exhaust such as loose baffles in the muffler. To rule out accessory drives and pulleys as a source of noise what you can do is momentarily run...

What type of Ball Joint System does a 2005 Nissan Altima Have? Or where can I find this information ? 2005 Nissan Altima

Hello - the front suspension on your Altima utilizes a lower control arm (with a pressed in ball joint), and a strut/spring assembly. The ball joint comes pressed into the aluminum lower control arm, and is generally not available separately....

Engine overheating and steam from vents also when i loosen the screw on engine air comes out for about 30 seconds

Hello, Overheating can be caused by a number of things such as low coolant levels, a faulty thermostat, a clogged radiator or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper...

replaced serpentine belt now no ac

If the a/c was working before you changed the belt and not it does not work and the belt squeaks then you may have put the belt on incorrect and it is blocking the a/c clutch from engaging. Check each...

Loss of power

It looks like there can be a variety of reasons as to why your Chevy Monte Carlo is losing power under acceleration. These reasons include a fault in the ignition system, low fuel pressure or even a vacuum leak being...

fuel mixture is lean. must be adjusted

I'm guessing that you are getting a P0171 code or something similar. Yes, its telling you that the engine is running too lean, but there is not an adjustment that you can make. When this happens it is because of...

Related articles

2005 Kia Sorento vs. 2005 Chevrolet Blazer: Which One Should I Buy?
SUVs are great for playing out in the mud, taking kids and friends around to different places, as well as just running errands around town. While they are not known to be terrific for gas mileage, that problem is negated...
The Best Used Cars to Buy That Can Be Towed Behind an RV
Summer Summer is a great time for a road trip, but often travelers like bringing all the conveniences of home along, in the form of an RV. Then they tow their car behind it – sometimes this practice is called...
The Best Used Cars to Buy If You Get Motion Sickness
For For people that suffer from motion sickness, even on the shortest car trip, riding in a vehicle can prove to be unbearable. What’s great is that there are a number of cars on the market that can help to...