Q: emmissins test says i need oxygen sensor heater

asked by on

I purchased used engine runs great. Had Water pump replaced tune up oil change new thermostat, new struts. It won't pass emmissions due to oxygen sensor heater needs replaced, and rear catalytic converter efficency is below threshhold bank 2. what ever that means. I can replace oxygen sensor right away, will it pass emmissions then? or is another $400. in repair work needed.?

My car has 225000 miles.
My car has an automatic transmission.

Hello, thank you for writing in. The error message you got about the low threshold means the oxygen sensor has failed, the fuel system is off, or the catalytic converter is having issues. The amount of information available isn’t enough to tell which is responsible. You will want to start with the oxygen sensors, as they are most likely going to fail first. You can do more testing on the oxygen sensors before hand if you are equipped with a multi-meter. Otherwise it is a process of elimination. For more help replacing the sensors or more testing, contact our service department to schedule an appointment.

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
  1. Home
  2. Questions
  3. emmissins test says i need oxygen sensor heater

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: Will my car pass smog if the coolant is leaking?

Claimed by Kevin Gainer

Q: The A/C works only when the fuse has been replaced in order for it to continue to work. What causes this?

It is important to know which fuse you are replacing. Is it the fuse to the compressor clutch or to the blower motor to be precise. Either way, I can give you some insight that you can use to figure...

Q: Faulty O2 sensor

Hi, it is possible for the O2 sensor to not turn on the Check Engine Light if it is failing slowly. It's also possible for leaks to occur, which can throw off the sensors readings. I would recommend having a...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...