I've had test pipes for 2 years with out any issues. Recently I had three codes pop up, P0137 Low Voltage Bank 1 Sensor 2, P0138 High Voltage Bank 1 Sensor 2, P0139 Slow Response Bank 1 Sensor 2. I have not done anything to the car since she was tuned in December.

To me this screams faulty sensor, the tech at the dealer thinks it is because I lack my cats. Thoughts? I've checked the 370z forums and doesn't look like anyone else has these three codes.


Codes are pulled via Ecutek

 

Sounds like O2 sensor has fouled. I'd pull the sensors and give them a good cleaning with some throttle body cleaner first, then clear the codes and see if they come back. If they do it might just be a failed sensor.

Also check the harness for damage, just incase a wire is loose/compromised.

 

Or seafoam the car first clear closes then see if it comes back

 

Since it is downstream I don't think that'd do much. Good for cleaning inside the engine but 02 sensors, not so much.

 

Seafoam? Lmao.

 

Thanks for the suggestion guys, I've cleared the codes 3 times and they keep coming back. After what I assume is the emissions cycle. +/- 100 miles.

Attached is what the tech is saying. I think I'll go to joetech (ecutek vender) and have them tune the code out.

 

Take the 02 sensors and let it sit in the seafoam

 

Swap the sensor for the other side and see if the code follows, that'll narrow it down for sure. Unless they're both bad of course?

Then again, if you have test pipes, they're pointless sensors anyway, I'd just tune them out..