P0400 indicates an EGR Flow Malfunction. The ECU has detected that the Exhaust Gas Recirculation system is not flowing the expected amount of exhaust gas back into the intake. On the Z32, this is frequently caused by carbon clogging the EGR tubes (especially the one running under the plenum), a failed BPT valve, or a stuck EGR valve itself. It can also be a vacuum leak in the lines controlling the EGR.
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Dazsw 12 hours ago 12 hr
ok so this was feckin ages ago but ive only just joined this site. last years jap show at the pod (the really hot one!) on the way there, me and my mate were in his maroon r33 skyline, think there was a pulsar behind us, coming off a roundabout near the pod, u booted it. long time ago just interested if anyone remebers? j