Thread: w210 300td p0400 and p0243 at same time
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Old 06-14-2013, 10:05 PM
TMAllison TMAllison is offline
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Join Date: Feb 2004
Location: Walnut Creek, CA & 1,150 miles S of Key West
Posts: 4,874
Mine used to trip PO243 everytime I went up Andrade grade on Hwy 680. Was never able to resolve it. PM me your email and I'll send you the test procedures. Can be electrical and/or vacuum isues with the tranducers. I never had much luck swapping them, pretty sure boost and egr codes set at very different values with boost being more particular.

The solution for me was backing off the go pedal going up that hill after 5 secs for a split second and then feeding it more power again. The code sets at 6 secs. Easy to avoid when you understand that.
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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)
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