Is your car throwing codes or are you having a hard time passing your state or county emission test? Ask how to fix it here.
- 2GN Member
- Posts: 49
- Joined: Wed Sep 04, 2013 1:06 pm
- Location: WI
Its been brought up before...
I have a TTi LT header installed on my 03 sohc. I have the upstream o2 sensor installed, but unclipped the downstream. The cel for p0038 shows up for basically having a bad/no cat. Will not having the downstream plugged in harm anything on my car? I.e. mpg or engine wise?
O2 Sensor 1/2 Heater Circuit High
- Junior Admin
- Posts: 19349
- Joined: Thu May 03, 2007 12:14 pm
- Location: Ashland Ohio
That is the code for the 1/2 o2 sensor circuit. If you plug it back in, you will get the code for a bad converter. You could try the non fouler for spark plugs trick. It is hit and miss.
IIRC, the 1/2 sensor is used for long term fuel trims. How much this impacts an NGC car, I have no idea.