2010 2500 6.0L
Had an exhaust manifold leak which has been addressed, and may or may not be related.

Had front and rear bank 2 codes. Replaced both O2's and repaired a broken wire on rear o2 harness.

Still getting p0050, pp59, p0154, p0155, p0300. All dealing with front passengers o2 sensor. I didn't see any obvious wire breaks. Fuses are not blown. Where are the likely places to look for wire breaks? Anything else I should be looking for?

The p0300 is not an o2 code, it's a random misfire. I'm not at work so I can't look up the others. You may have more issues going on than just the o2's. And yes, an exhaust manifold leak can affect and set o2 codes.

Bucky, I assume you cleared the codes and did a drive cycle after you fixed the manifold, and replaced the sensors, because all the codes relate to the heated o2 sensor, except the misfire which is common.

quote:

Originally posted by Coloradoracer:
The p0300 is not an o2 code, it's a random misfire. I'm not at work so I can't look up the others. You may have more issues going on than just the o2's. And yes, an exhaust manifold leak can affect and set o2 codes.

Yes. The rest were bank two front o2 codes. I will say I do hear a faint tick still from the exhaust manifold when cold.

I have not done a full drive cycle since fixing the exhaust leak. Maybe I will before searching endlessly.

Well whatever critter got me the first time got me the second time. Truck is staying in the garage. Three wires chewed through down at the o2 harness. Fixed the rear one a few weeks ago.

It's messy as hell, but the critters will leave the wires alone...put some antiseize on them...not much, just enough to give them a taste....