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...
Was any work recently done to the car that may have triggered this? When was the last time you replaced the O2 sensors? Check the O2 connectors and wiring to make sure one of them hasn't contacted the exhaust or melted. Any exhaust leaks especially before the cats? When was the last time you performed an induction service and cleaned the intake, TBs, IAC, etc? The EGR and IACV love to get carbon buildup over the years and can affect flow, similarly can happen to the vac lines to the factory wastegate control solenoid. You mentioned the car felt like it was still running well, so no idle RPM fumbling, hanging, stumbling, etc? Are you running an aftermarket boost control solenoid or OEM? Sorry for the load of questions, but need a bit more to go off of to help point you in the right direction.
Even though the vehicle has considerable low mileage, it's still 30 years old. If it's kept in a garage it tends to handle the elements better than sitting out in the external environmental conditions and will need more routine maintenance and care regardless if it's being driven or not. (i.e. 60K / 120k maint w/ timing belt)
By
protoj ·
All,
It pains me to place this post, but needs must.
I am seriously considering selling my ZX due to marital issues.
It's a White UK MANUAL TT 95k on the clock
Almost full Nissan main dealer history.
I have bills for £1500.
Bodywork in good condition.
All the usaul extras leather, climate etc.
Looking for £6.5k ish as looked after UK maunuals are hard to find, I should know it took me ages to find this one.
NEVER had any engine/turbo problems just spent £1000 on the MOT having brake pipes and rear track rods replaced.
Its going to gut me to lose this car, but lifes a bitch ...
I live and work in West Sussex.
If you want to talk more my email address is glenn.summers@paularosa.com
Cheers,
Glenn