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chili34
Novice
Mar 21, 2009, 10:31 AM
Post #1 of 6
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engine service light
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2003 honda ex 4cyl 4wd with 23000 (yes 23000) miles
I have an engine service light displayed. Before I have the obc read I thought should get some basic info so I can make a reasonable decision as to who makes the repairs.
Just in case it is a faulty oxygen sensor:
How many oxygen sensors does the Honda have? And where located?
Are they somewhat accessible for handyman replacement?
In a parts list site there were 2 wire, 3 wire and 4 wire sensors from several manufacturers at prices from $26.00 to over $200,00. What manufacturer would be best considering price?
If it's anything else, like the egr valve I'll have to revisit you folks for further guidance.
chili34
I had the emission read out today and it is not an oxy sens. The printout says that:
BBVAP control system small leak detected:
pobable cause;
001 loose fuel cap (checked and appears ok)
002Faulty EVAP system hose (from what I see under the hood all hoses look intact and tight)
003Faulty purge solinoid
004Faulty vent solinoid
is there a way to check these solinoids? And where are they located?
I did not have the computer codes reset. I understand that if I disconnect the battery for 10 mins that the set codes would be cleared. Is that right.
Is there a site on the internet that would have a schematic diagram of the emissions systems on my Honda?
any help would be appreciated.
(This post was edited by chili34 on Mar 23, 2009, 9:31 AM)
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Loren Champlain Sr
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/ Moderator
Mar 21, 2009, 10:38 AM
Post #2 of 6
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Re: engine service light
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Chili; You didn't mention which engine. 4 or 6? You really should get this diagnosed before replacing parts. To answer your original question, though, it will have at least two O2 sensors. One, upstream, and one downstream. The downstream O2s, generally, don't go bad. When they do, it's usually the heater circuit. They are there to monitor the catalyst efficiency only. Won't cause a drivability issue. The other question, I like to use Bosch O2 sensors or from the dealer. That doesn't mean to ignore it, though.
Now, with that said....just because you come up with a trouble code, that doesn't mean that the actual part is defective. The code is telling you that the computer is seeing a problem in that particular system.
Loren
SW Washington
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chili34
Novice
Mar 21, 2009, 11:40 AM
Post #3 of 6
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Re: engine service light
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It is a 4cylinder engine, Thanks for the info. I am going to have the trouble code read. I just want to be able to make an informed decision as to who will do the repair me or the dealer if it is a oxygen sensor code. If it's something else it will most likely be done in a repair shop when I have the money. So I do need to know if the foreward sensor is bad can I replace it or is it located in a place like the oil filter is.
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Loren Champlain Sr
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/ Moderator
Mar 21, 2009, 12:04 PM
Post #4 of 6
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Re: engine service light
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Chili; The upstream O2 sensor should be in the exhaust pipe just below the manifold. But, be sure it is the sensor that's bad, not a circuit problem.
Loren
SW Washington
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chili34
Novice
Apr 5, 2009, 11:06 AM
Post #5 of 6
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Re: engine service light
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I never did "fix the engine service light problem I just cleared it by opening the poitive battery lead and it went away and never came back on. I suspect that the light was caused by a loose gas filler cap. I'm just happy that I did not end up with a huge emissions repair bill. Thanks to all that tried to help.
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Loren Champlain Sr
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Apr 5, 2009, 2:19 PM
Post #6 of 6
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Re: engine service light
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chili; I don't want to burst your bubble, but have you passed the emission test? The EVAP monitor is the last one to complete. In WA, if you have more than one monitor incomplete, they won't test the vehicle. If the fuel tank is too low or too full, it will take 'forever' for the monitor to complete. A leaky gas cap will usually set a 'gross' EVAP leak code. Each time you disconnect the battery, it will take just that much longer for the readiness monitors to complete. (in the future, disconnect the negative cable, not the postive...for safety reasons) I'll keep my fingers crossed for you.
Loren
SW Washington
(This post was edited by Loren Champlain Sr on Apr 5, 2009, 2:21 PM)
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