P1110 Code on 2001 Pathfinder

[sroot]

I have read the sticky and think that my problem could definately be the solenoid. Is there any way that I can clean the solenoid or does it have to be replaced? This is the sensor that is on the left side right at the front of the engine in a very accessible spot right? What is the part number that I need to replace this? A little history: the SES light has been on for a while, I have replaced the sensor in the past only to have the code come up again. The previous owner didn't change his oil regularly so I've had some sludge issues. Any help would be greatly appreciated.

[sroot]

I've learned a lot reading all the forums. Can soemone help me with a part number for the P1110 code. What is the sensor part number and I guess I might as well get the solenoid number too. This is the left side right? I'm attaching a diagram that is great. Is the sensor for a p1110 the one highlighted in blue or is it a different one (there are so many)

Thanks in advance for the help

[sroot]

Oh yeah, also what is a good affordable code reader? I don't want to blow the bank here, but I don't want to waste my money on some piece of junk

Thanks