Hi, I've got a 2000 VW Passat V6 and was traveling on the highway for a half hour or so and the check engine light came on, and scanned and said P0431, which is Warm Up Catalyst Efficiency Below Threshold (bank 2). Just last night, I drove again on the highway for an hour or so, and it was obvious by watching the gas gauge that I was getting worse gas mileage. I cleared the code and went and drove a half mile or so and no code came back up. Any idea what this is, and if it is going to stay off? Thanks
have the same problem?
Saturday, February 10th, 2007 AT 2:30 PM