What were the exact codes?
The CMP sensors (there are 4 of them) are sticking out of the valve covers on the passenger side of the engine. They look like little cylinders, around 3/4" in diameter. 2 sensors for each cylinder bank.
I had a lot of problems with sludge build-up on several different cars, even after changing the oil faithfully with full synthetic over the years. I tried Seafoam and it did nothing, along with others like Gumout Multi-Tune and several professional Valvoline flushes at a quck lube. Finally, after a lot of research, I started using one quart Marvel Mystery Oil in the crankcase in several different cars.Thanks Jeff Sorry for the long delay.
Ive read some stuff about dirty oil being the problem, Im good about my oil changes and ive even thrown some seafoam in a few hundred miles before the last one to see if it could clean anything out. Didnt work. Id love to be able to tackle this myself if possible..
I wonder if when they did the waterpump they possibly put the timing chain back on wrong?Those codes do not indicate failed sensors, they indicate incorrect phasing between the CKP sensor and the CMP sensors. My guess is you have an internal engine issue such as stretched timing chains, damaged chain guides, plugged VCT oil screens, etc.