Edited by ukat5111 on March 30, 2016, 4:05 pm I take it you've done a good smoke test on this?
Opel/Vauxhall Field Remedy: 1789
Models: Astra/Zafira etc.... Vectra-C 2002...2004, Signum 2002...2004
Subject: Engine Y20DTH/Y22DTR - Electrical EGR valve malfunction, DTC P400(C) and/or P0400(9) is set.
Complaint: EGR valve malfunction. Vehicle in emergency mode (with the above codes).
Cause: EGR position recognised but not valid in ECU. DTC will be set due to plausibility check? EGR feedback is NOT required by ECU.
Remedy: (note: for Astra-G and Zafira the EGR valve has to be dismantled).
Cut cable GYBK 0,5 (grey/black) from EGR valve pin 4 to terminal 19 at ECU plug directly at EGR plug (not at pump side.
See Dealer or TIS for details and diagrams.
There is also mention of a software update, it just depends when the fault code is set, when starting up (fix as above) or when driving (software update)??
If you were to use tech 2 it always gives the fault code and a subcode
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Vauxhall Zafira 2.0 Y20DTH 2004 - EGR fault, code P0400 # - Ian Durston March 26, 2016, 4:44 pm
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