Check Engine Light Stay On

[R77F1]

Hello everyone!
My NSX was stored inside the garage throughout Minnesota winter and when I had a chance I would warm it for 10 to 15 minutes. The check engine light was on and kept on. I took it to the Acura dealer and they ran the diagnose on it. The dealer found out that "BANK 1 SENSOR 1 FAILURE", estimated cost of repair is $375 . Currently, a part was being special order. Do NSXers have this type of problem with their NSX? Please help me if you had? I would like an instruction of how to fix it myself.


A quick reply is greatly appreciated!
Thank you in advance.

 

[Briank]

That is an o2 sensor failure which is not uncommon. They are not hard to replace yourself if you have a fair amount of wrenching skill. Being a 95 the replacement may be covered under warranty see http://www.nsxprime.com/FAQ/Reference/tsb/98-031.htm

 

[R77F1]

That is an o2 sensor failure which is not uncommon. They are not hard to replace yourself if you have a fair amount of wrenching skill. Being a 95 the replacement may be covered under warranty see http://www.nsxprime.com/FAQ/Reference/tsb/98-031.htm

The service supervisor didn't say anything about Emissions Warranty Extension but I will call the American Honda Consumer Affairs Department to find out if my NSX's problem will cover under Emissions Warranty. I hope it will. Thanks again!

 

[Da Hapa]

I just had to replace the rear bank o2 sensor on my 1998. Car has 48K miles on it and unfortunately for me, Honda only extended the emissions warranty on certain cars and the 1998 MY isn't in that batch.

So my wallet is lighter by $380 (including tax) but my light is gone. The car doesn't run any differently at all but I couldn't have passed California's Draconian smog req's without the fix.

 

[Larry Bastanza]

The service supervisor didn't say anything about Emissions Warranty Extension but I will call the American Honda Consumer Affairs Department to find out if my NSX's problem will cover under Emissions Warranty. I hope it will. Thanks again!

Print out the TSB and bring it to them. It will be free.

Regards,
LarryB

 

[R77F1]

The service supervisor didn't say anything about Emissions Warranty Extension but I will call the American Honda Consumer Affairs Department to find out if my NSX's problem will cover under Emissions Warranty. I hope it will. Thanks again!

:biggrin: I talked with the American Honda Consumer Affairs Department and found out '95 NSX is cover under Emissions Warranty Extension. The Acura Dealer will inspect and fix the Emission Control System free of charge, including parts and labor. I'm glad I joined this helpful community. I save a lot of $$!

 

[96 NSX-T]

I had the same problem last year and luckily I saw on here that our cars are covered for 14 years on emmissions. They fixed mine for 0$ and I got to drive a TL with satillite radio all day. But they would never have told me it was free, because they were going to charge me so I printed out the thread from Prime about it and took it in with me, and like magic, I got it done for zip. Thankx guys!

 

[Goldie Loc]

Thats for the very helpful information I got a 97 NSX-T and my light been on for a while I'm going to my acura dealership and let them no about this warranty.:biggrin:

 

[Ruined 2]

I'm having a similar problem. Thought it was the gas cap, tightened said cap and reset the CEL by disconnecting the battery for a few minutes. About 100 miles later on a beautiful sunny day drive, not a care in the world, the damned light came back on . Printing out the TSB, waiting for the rain to stop here, and I'm heading to the dealer :smile: .

God bless NSX Prime and the Search feature! :wink:

 

[OLDMNSX]

Hello everyone!
My NSX was stored inside the garage throughout Minnesota winter and when I had a chance I would warm it for 10 to 15 minutes.

A quick reply is greatly appreciated!
Thank you in advance.

Just a thought if you store your car next winter.....IMHO running the engine is not the best thing you can do for it. Remember that one of the by-products of an internal combustion engine is H2O! Good old water. This is quite visible during the winter, just watch the exhaust on all automobiles. When you run an engine and all fluids are not completely allowed to heat up this water that is produced remains in the engine and exhaust system. This may have been a contributing factor to your O2 sensor failure. Small amounts of this moisture will remain in your oil also, where it doesn't get to temperature and evaporate it.
My suggestion would be to remove the right rear wheel, insert a (19mm or 21mm don't remember which) deep socket with extension and once a month rotate the crankshaft 120 degrees. This will relieve some valve springs from constant compression for the whole time in storage. Don't worry too much about the 120 degrees, just turn it till it gets stiff and stop turning. One of the pistons is just coming up on compression, that is what you want. If you wait about 3-5 minutes it will turn freely again until the next piston comes up on compression. Turn it clockwise. Check out my pictures. My car will end up being stored for 16 or 17 months and that is all that I am having done to it. Needless to say, I had about 30 people offer to drive it while I was gone. I really didn't want to come home and find it in a heap!!!

 

[R77F1]

Just a thought if you store your car next winter.....IMHO running the engine is not the best thing you can do for it. Remember that one of the by-products of an internal combustion engine is H2O! Good old water. This is quite visible during the winter, just watch the exhaust on all automobiles. When you run an engine and all fluids are not completely allowed to heat up this water that is produced remains in the engine and exhaust system. This may have been a contributing factor to your O2 sensor failure. Small amounts of this moisture will remain in your oil also, where it doesn't get to temperature and evaporate it.
My suggestion would be to remove the right rear wheel, insert a (19mm or 21mm don't remember which) deep socket with extension and once a month rotate the crankshaft 120 degrees. This will relieve some valve springs from constant compression for the whole time in storage. Don't worry too much about the 120 degrees, just turn it till it gets stiff and stop turning. One of the pistons is just coming up on compression, that is what you want. If you wait about 3-5 minutes it will turn freely again until the next piston comes up on compression. Turn it clockwise. Check out my pictures. My car will end up being stored for 16 or 17 months and that is all that I am having done to it. Needless to say, I had about 30 people offer to drive it while I was gone. I really didn't want to come home and find it in a heap!!!

Thank you for your suggestion OLDMNSX. I will have to do the way you had been done for your NSX if I will park my again this winter.:frown: