Coilpacks start to go 'at 100k'. If one is bad, buying one, swapping until hit jackpot - replace only one and save. If two are bad - too bad one doesnt hlp. If three are... etc. Its part of 'routine maintenance' to swap all - all systems are built just to milk all loose money from all that is moving.
The error code is either just 1. errorcodegenerator related -or- related to 2. real authentic bad exhaust problem = O2 problem detection.
1. 'Any' issue here can be the cause, starting from alt generated charge ripple to intermittent sensor(s) failure; see pages 9,10,23 also
http://www.cardomain.com/ride/748507/14
2.
- If u now have Bosch plugs, try hittin next six magpies - buy/swap to ngk plat before doing anything more. If NGK, Check now all plugs, compare to
www.ngk.com troubleshoot pics. all ok? Check gaps. Check for healthy spark visually (when cold).
- swap all coilpacks
- mother nature: moist weather means condensing. On certain conditions, even the plugs may be 'swimming' in their wells: condensed water runs down causing shorts until warmup evaporates all this.
- for some reason there has been coolant splash over engine compartment in past history (you DONT know even if u are first owner). Glycol crystals suck moist from air, critically located and then this causes shorts when cold.
- you swapped wrong O2 and/or it was DOA dead on arrival
- ECU has had it or doesnt get juice enough: all troubleshootin starts from checking voltages, groundings