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: My left and right window is not aligned up. They are one inch over.

Hi there. On the track to the windows, there are two plastic bearings (like a roller wheel) that rotates on the rail as the window is moving up and down. They are on both sides of the window track. Sounds...

Q: I have a 2002 Ford F-150 single cab has a rod knock and dies while driving

Hi There, The rod knocking you are hearing in your 2002 F150 may be related to a rod bearing that is beginning to fail. Adding additional oil to the motor may temporarily solve this, but it will eventually come back...

Q: All 4 heated O2 circuit high, and alternator not charging

As you may know, the alternator is unrelated to the O2 sensors and these will not impact the charging of the battery. The charging issue may be related to a bad voltage regulator which is a unit that monitors the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.