92 Accord EXR – Code 1, 41, 43

This topic has 24 replies, 5 voices, and was last updated 12 years, 7 months ago by EricTheCarGuy.

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August 27, 2011 at 11:00 am #440463
RichWhitehead
Participant
Good afternoon everyone.
1992 Accord EXR failed emissions test…..
issues –
NO reading almost double the allowable ppm.
CO% almost four times the allowable reading.

The internet and a paper clip helped me pull OBD codes 1, 41 and 43 from my 1992 accord.

Code 1 –
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September 7, 2011 at 11:00 am #440478
RichWhitehead
Participant
@Big C

Prior to reading your post I went ahead and removed the EGR valve itself.
September 9, 2011 at 11:00 am #440480
EricTheCarGuy
Keymaster
High NO is usually the result of an EGR or catalytic converter problem. As for the EGR the cleaning the valve probably won’t cut it you may have to go in and clean the passages. As for the cat the easiest way to tell if it’s working is after the car is warmed up take it’s temperature and the inlet and the outlet, it should be 100
September 13, 2011 at 11:00 am #440481
RichWhitehead
Participant
@ BigC – tested the EGR with the vacuum pump and it’s operational.
@ ETCG – EGR port plugs were pulled, ports cleaned and new plugs installed.

There is now a very noticeable exhaust leak in the front pipe at the flex.
September 13, 2011 at 11:00 am #440482
EricTheCarGuy
Keymaster
There is something else that helps with NOx emissions and that’s the catalytic converter, if you strike out with the EGR you may be headed there next to get the NOx down.
September 15, 2011 at 11:00 am #440483
RichWhitehead
Participant
Fixed the leak in the exhaust…
Failed the etest.

Changed the catalytic converter….and then it PASSED!!

Thanks to all contributors to this thread for all your help.
It was pretty nice to solve a problem systematically rather than taking shots in the dark…(and the wallet).
September 15, 2011 at 11:00 am #440484
BigC
Participant
Great. Thanks for the updates RichWhitehead. Glad you got the problems fixed. I enjoyed the systematic approach you took. Glad we could help. Until next time…take care.
September 16, 2011 at 11:00 am #440485
EricTheCarGuy
Keymaster
It’s not the valve that normally gets clogged, it’s normally the passages from what I’ve seen. You could redo the test to see but if the NOx is still high then it’s time to start looking at the catalytic converter.
September 18, 2011 at 11:00 am #440486
RichWhitehead
Participant
Hey Eric…..you must be tired, man…..you’re a work-horse…
Changed cat on your advice earlier and car passed e-test.
Car is good to go….until next time.
Thanks a million.
September 19, 2011 at 11:00 am #440487
EricTheCarGuy
Keymaster
Sweet thanks for keeping us up to date. It is true, some of my days can get pretty long but it’s hard for me to say no to someone asking for help.
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