Hello all,

1999 ML430, 217,436 miles. Check engine light came on the other day. Scanner came up with code P1400. After investigation I found that this means electrical malfunction of the EGR Transducer, which it seems is attached to EGR valve. Changed EGR valve once 4 years ago.

My question is:

1. What could have caused this and will just switching out EGR Valve solve problem?


Thanks for any help.

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1999 ML430
2003 Chevy Suburban Z71
1993 Honda Prelude V-Tech