Q: Check Engine Light and O2 sensor on a used car

asked by on November 04, 2016

Hey, I'm buying Mazda rx-8 from a private seller for $3000 and the seller says the only issue with a car is check engine light is on and o2 sensor. How much it will cost to repair it? Thank you
My car has an automatic transmission.

Hi there. Assuming the vehicle Check Engine Light is an O2 sensor code does not necessarily mean the O2 sensor is at fault. It could be an electrical fault in the O2 sensor circuit(s). I highly recommend that you have the vehicle properly inspected by a certified technician, such as one from YourMechanic, if you are seriously considering buying the car. They will be able to give you a precise diagnosis on the problem and can conduct a full inspection on the car to unravel any faults that may not be apparent. If you would simply like an estimate for the oxygen sensor replacement, you can enter the vehicle information on our estimator page for a quote.

Was this answer helpful?
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

My car will go into gear. But when I try taking off it won't go

Hi there. Typically on a manual transmission, this is an indication of a clutch malfunction. Since there are multiple components that comprise the clutch system on a modern car, I would recommend having a professional mechanic complete a car does...

Timing belt problem - 2004 Nissan Maxima

Actually yes it is normal. I will go through a few things that you may or may not have done and hopefully we can get your issue resolved. When you put your crankshaft pulley on did you use an impact?...

Check engine light is off and when I turn on the key the car won't start. Just happened after changing the clutch kit.

Hi there. If the vehicle ran before you performed the job for the clutch exchange, then back track the work you had performed and look for anything that is not plugged in. Most likely, the crankshaft sensor was unplugged and...

Related articles

2012 Mazda CX-5 vs. 2012 Toyota RAV4: Which One Should I Buy?
Mid-size crossover SUVs are an excellent option when you need to take several friends along with you, or bring your kids along and yet still need to keep a tight leash on your purchase cost as well as your ongoing...
How to Search Your Car for Contraband
Out Out of all the nightmare scenarios that people play through their minds during their commutes, getting into legal trouble for unknown contraband found in your car is one of the most common. The fact that you could go to...
P0376 OBD-II Trouble Code: Timing Reference High Resolution Signal B Too Many Pulses
P0376 code means there is an irregularity with the high resolution timing reference signal coming from the PCM requiring urgent attention.