First start a new thread.
Second oil leaks do not cause 174 codes other then the v/c gasket. Once you verify if the oil from the valve cover caused a 02 issue then start looking for a vacuum leak or exhaust leak.

 

I'm aware that 0174 does not cause oil leaks. I explained, if you re-read my post (to a related issue) is that the oil leak may be causing the o2 to malfunction. Therefore I was going to try to take a 'stab' at that first. Thx Savanah, i'll give her a whirl.

 

so i'm getting codes P0150 and P0174. Understand it has to do w Bank 2 running rich (maybe malfunctioning o2 sensor (passenger side), BUT will that also drain my coolant? I just drove back from Charleston (900 miles total) and i just noticed yesterday that it drained all of the coolant. When i drove over 75 mph i was experiencing a rough ride. It sounded like the engine was struggling. Does this have anything to do w the o2 sensor and/or these codes?

 

No. It has to do with you about to have a new table for the man cave. Coolant loss is a big problem. The coolant jug allows you to see level even with engine hot and running. Empty jug is large problem. You don't know you are overheating because of the factory gauge, programmed to point at 50% fro about 130F to 240F.

Coolant can go the following places:

Out the expansion cap and vented (because pressure exceeds the old worn out cap when driving) or that exhaust gas and steam in coolant exceeds that pressure.

Out the head gasket or valley pan gasket or water pump gasket or front cover gasket or throttle body gasket and leak down side of engine. You can borrow a pressure tester from parts store and pump up to 15 PSI and let it sit 30 minutes for leak to appear.

Out a corroded freeze plug.

Into oil (makes it milkshake and overfilled, you may not have checked your oil either on a 900 mile road trip)

Out the tail pipe as white smoke.

Out of any of the hoses or connections on drawing.

Can makes sounds like gurgle bubbles under dash, from exhaust gas moving thru heater core. $50ish test for that, changes color.

Driving along at 235F for extended periods can warp heads, cause the cylinder liners to break loose, and generally lead to things that cost so much that the O2 sensors will look like pocket change.

Running rough makes one think of misfires related to coolant in combustion chamber. Makes plugs look steam cleaned.

 

I had the oil changed the day before i left for the trip. So i guess this is a separate entity to my o2 sensor issue. Guess i've got my work cut out for me looking for this leak. i'll keep this site posted...thx buzz

 

just an update....I've changed out all plugs and wires. I've replaced o2 sensor bank 2 upstream. snugged down valve cover bolts. Coolant is keeping its level. Codes are cleared! Still feels like its runs rough on acceleration, but nothing close to as bad as it was. Thx SB and DM! Now onto 3 amigos. fml lol