todds87ss
Member
Please forgive the "no newbie introduction", but I've been around the planet a while, and do not need that sort of validation. I recently purchased a 2012 NMS Passat TDI from a local dealer to replace my trusty 2003 jetta TDI. I did not perform my usual due diligence, as I was stoked about getting such a great price. After about 100 miles, the CEL lit up. I scanned it and noted a P2201. No problem, let's see what the interwebz say...(crickets....). There is not much info out there regarding the NOX code, except replace the sensor. Well, it's not an O2 sensor at 40 bux. It runs $400 or so. Gotta be another fix...So I got out the O2 sensor socket and went to work. The first thing I noted was a very dirty O2 sensor (under the hood, by the firewall). OK, pull it and clean it. Shot some trusty carb cleaner on it and let it dry. Next, the NOX sensor. Tougher to find, this one is under the car, about 1/2 way to the tailpipe. Looks like an O2 sensor and uses the same size socket. I do not advise using a wrench, as rounding off is likely. Pulled this one, and could not see through the small pin-holes on it. OK, spray carb cleaner into a small glass jar, and soak the sensor for a minute. After shaking off the excess and letting it dry, I could now see daylight through the pinholes. It was reinstalled. I let it sit overnight just to make sure that the sensors had completely dried. Then I started it. I have waited to post this until the readiness codes reset, and the CEL has remained off for 500 miles. If your P2201 is causing you to lose sleep, try cleaning first.
Happy trails,
Todd
Happy trails,
Todd