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Check engine P0031

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2.6K views 3 replies 2 participants last post by  bblackmoor  
#1 ·
I installed headers this week. Although everything is hooked up and the car runs fine (I put 130 miles on it today), I have a Check Engine light and an error code of P0031. I have no other errors (yet).

From my reading and searching here, I have found the following information:

P0031 Heated oxygen sensor (HO2S) 1, bank 1, heater control – circuit low Wiring short to ground, HO2S, ECM

Possible causes:
1. Related fuse is blown or missing
2. Open or short to ground in power supply or control harness
3. Contact resistance in connectors
4. Faulty oxygen sensor​

Here are my questions:

  1. I have four O2 sensors: two front, and two back. What is "bank 1"?
  2. Assuming that I know which sensors belong to bank 1, how do I determine which of the two O2 sensors is causing the error?
  3. Assuming that I determine which sensor is causing the error, how do I determine whether the sensor is bad, or if it is a fuse or something?

Thank you for your assistance.
 
#2 ·
I believe bank 1 is passenger side, sensor 1 is the one nearest the front of the car. You can test the sensor with a propane torch (when it is out of the car), but I can't remember the exact numbers/sequence. If you search, you should be able to find them.
 
#3 · (Edited)
Shiftless said:
I believe bank 1 is passenger side, sensor 1 is the one nearest the front of the car.
Click to expand...
That's the easiest one to get to, fortunately. I just double-checked and made sure it was plugged in.

Where would I find its fuse?

Also, I have read that the Tiburon is extremely finicky about its O2 sensors, and will throw errors if common aftermarket O2 sensors are used. If I do need to buy a new sensor, what sensor should I buy?
 
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