A. DTC P1705: Short in Transmission Range Switch (TRS) Circuit. The TRS lights the A/T gear position indicator in the instrument panel shows which gear has been selected. The PCM also uses this information in order to manage the fuel system for maximum efficiency. The most obvious symptom you will see is the A/T gear position indicator lights will not come on or come on in the wrong position. Once this is repaired emissions should pass
SOURCE: Can't get 1991 Honda Civic to pass an emissions test. What could
Not knowing the history or why it's failing is tough to determine.
If it's due to a vapor emission issue, you'll need to check the filler tube on the fuel tank for a minor crack or rust through. Usually this can be done after driving the car and getting up close and smelling for any fumes, following them to the source. Use epoxy sealer to fill the hole or crack if this is an issue. I found this was usually due to gravel hitting against that pipe causing it to then rust leaving minor pits & holes.
Tune-up, is the car running properly? If not, a tune up is imperative. IF you have had it tuned and parts replaced, make sure the Air filter was one of the items.
Make sure your oil is fresh and has been recently changed. Oil viscosity has a direct effect on engine performance and the amount of bypass fumes are put into the exhaust as the engine is runnning, as well as affecting valve clearance.
Go to an autoparts store and by some cleaner for your emission system. also, add a little octane booster and if you fill your car up before testing, use Premium fuel, or at least fuel at a higher octane level, this produces less emissions as it causes a better fuel burn.
If you haven't seen the cure up to now, you may need a new catalytic converter, have yours tested by a reputable service center. Converters get hotter than the exhaust when working properly, if the converter is at the same temp as the pipes coming into it, it's not working.
good luck.
SOURCE: 1997 Honda Civic emission control system problem?
Yes the problem is effecting the emissions controls. Sounds like the timing if off. Take the vehicle to you local Auto Parts Store and most will scan the ECU for fault codes. This code will help you to figure out the problem.
SOURCE: will not pass emissions test
the light is an emissions code in there sometimes its a oxygen sensor or the egr valve gets clogged in hondas...you need to retrieve the code to narrow the problem down
SOURCE: MY 1992 HONDA ACCORD WON'T PASS THE EMISSIONS TEST
if it's slightly above the limit.. you could try putting in premium gas or an octane additive as that will lower your emissions slightly..
SOURCE: 1993 honda civic ex will not pass HC emissions
You don't say what state you are in and what the requirements. The early 90s Honda Civics frequently are high on emissions under certain circumstances depending on how the test is run. If you are in a state that allows you to get a waiver with a certain amount of repair - that would be the recommended way to go. A lot of times the amount required is enough to detect the problem, but if not it is basically the cost of keeping the car. I am in Washington State and my 91 Honda Civic runs great and gets 38 mpg but fails the test. I have a new O2 sensor, catalytic converter and distributor and fail. I pay $150 for repairs / waiver every 2 years - and I am an ASE Certified Master Tech. I figure $75 a year saves me a car payment.
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Thre are many reasons for this. 1:How many km//miles on it?2:Is your check engine light on? if it didnt pass emissions it should be if so what is the code defenition?3: Is it still equiped with a catalytic converter?
the code results were P1705. there's abot 163,000 miles on it. my check engine light has been on for a while, otherwise runs with no other problems except for the remote locks. I have to lock/unlock car manually.
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