Hiyall,
Back again.. this time with Enginer Service light alway on problem. Started just today...

Following error codes popped up on key dance :

12
21
55 (end of code)


Can these 2 cause service engine , has engine blown or about to go kaboom on me ??

How much for repairs if it can be saved ?

 

no 21 is an easy code to fix you just need a new 02 sensor, code 55 is always there it lets you know that it is the end of codes. 12 is also pretty much always there too 12 means your battery was dissconnected withing the past 50 key cycles. but here is the code list page if you have any further questions on codes http://www.allpar.com/neon/codes.html

 

Well the engine light has gone out of its own going to do code test again, the trunk was filled with water due to heavy rains we been getting in canada !!! Is there any o2 sensor in the back of vehicle or something ? could it have been causing engine light issues ?

Which O2 sensor though , i read there are 2 of them in neons ?

 

well take your tail lights off and replace the foam gaskets and that will fix the water in trunk issue. there is an O2 sensor right past the cat and one before the cat on the maifold. and I believe that some Neons have a third one in some cases, but I can not be to sure on that.