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Old June 2nd, 2017, 12:47   #31
Join Date: May 2017
Location: Central Coast CA

My 98 Jetta TDI just failed recent smog check in CA. Everything was good but the amber light on the smog techs scanner -- my EGR readiness monitor is not ready and not sure why. No CEL nor DTCs (except one for a warning lamp). I've never chipped nor tuned the ECU and am a novice mechanic but was able to get it to pass 2 years ago following advice on forum (re: glow plug replacement). I read somewhere else that it could be a bad MAF but don't understand why that would not throw a CEL nor a DTC and don't want to spend $ to find out that is not the problem. Vacuum leak? Sticking EGR? I'd appreciate any advice and ideas. Thanks
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