Those codes are all pointing at a related issue. A/F ratio falling out of range, heater elements within the O2's out of temp range, EGR sensor or exhaust gas temp falling out of range, etc. There is a few areas to consider...
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protoj 5 hours ago 5 hr
Here is my series 2 ECU as taken from my zed. The only reason for sale is that Eurospec prefer to work with the Link ECU. This one is a couple of years old and has served me well with zero problems. I'm not a technical guy so can't give a lot of info about it so here is a link to a new one
http://www.btnperformance.com/30-6620-plug-play-ems-series-2-manual-transmission-76-pins-nissan/
Ben had a Eurospec customer interested at £750 but can't wait as I need the money to help with the new build so here you are at £650.
It does have a map on it but not sure how much use to anyone else as was with nitrous and was for my sickly engine. So will of course need re-mapping.
Price is including insured post and packing.
Edited by bobgenie
dodgy link