Hi all,
I've got a fault code that keeps flagging up every so often, mostly from cold. P0404-78 EGR Excessive offset.
Car drives fine but does throw smoke out for first few seconds from cold. I've had a look at MES and a couple things stand out. First MAF air temp is -40. It might be an anomaly as when started it reads fine. Secondly EGR is open 9% on idle when warm. I assume it's meant to be closed so valve could be stuck open?
It was thoroughly cleaned out around 3k miles ago so I would like to understand the fault code more before removing it again (It's an absolute pig of a job)
Any knowledge is appreciated, thanks
I've got a fault code that keeps flagging up every so often, mostly from cold. P0404-78 EGR Excessive offset.
Car drives fine but does throw smoke out for first few seconds from cold. I've had a look at MES and a couple things stand out. First MAF air temp is -40. It might be an anomaly as when started it reads fine. Secondly EGR is open 9% on idle when warm. I assume it's meant to be closed so valve could be stuck open?
It was thoroughly cleaned out around 3k miles ago so I would like to understand the fault code more before removing it again (It's an absolute pig of a job)
Any knowledge is appreciated, thanks