BarryMunson
Well-known member
I have a 2014 Passat TDI. THe heater works on both left and right side until the engine gets to temperature and then it stops heating. I got a code P2457 before this happened.
I measured good delta T across heater core bibs before it shut down.
I also performed the vent control recalibration procedure.
I do not have any manuals to looks and the flow diagrams and am wondering if the EGR cooler is the root of this problem in that maybe the Cooler is bypassed until the engine warms up and then is directing flow through something that is clogged at the EGR or EGR cooler?
I measured good delta T across heater core bibs before it shut down.
I also performed the vent control recalibration procedure.
I do not have any manuals to looks and the flow diagrams and am wondering if the EGR cooler is the root of this problem in that maybe the Cooler is bypassed until the engine warms up and then is directing flow through something that is clogged at the EGR or EGR cooler?