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Electrical 2nd Gen Dodge Ram Electrical Problems and Questions.


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Old 03-17-2014, 01:08 PM
Sumguy Sumguy is offline
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Default Is there a code for "not ready for emissions" test?

I have to get an emissions test soon for my 2001 RAM (5.2L engine) which has very low miles (about 52k KM - 32k miles) and I've maybe put on 10 miles driving it since November. Back last year I got the P0442 code but it seemed to go away by itself after a week or two.

I keep the truck in a heated garage (temp usually about 50 - 55f) and outside temp is about 15 or 20 f right now. I was driving it to emissions test today - notices the check-engine light was on. I cursed, and canceled the test. I had about 1/8 tank of gas - the gas-low warning came on on my way back home.

I put gas in (guage showing about 1/2 a tank now) and I disconnected the battery for almost an hour, then reconnected, started engine, let it run for a few minutes, turned it off, checked codes -> no codes.

But I understand that if an emissions check is done - that the onboard computer will likely tell the technician that it's not ready to give the "all-clear" code (or how-ever you describe it).

I'm wondering if there's a key-code or some way that I can find out what state the computer is in so that I know it's ready for a test.

I bought an OBD2 or 3 hand-held unit a few years ago on sale for $50 but have really never used. Will that tell me anything useful about being ready for emissions test?
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Old 03-17-2014, 01:26 PM
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Dont know of any other way except with the code reader. Mine has an option to see if the car is ready. It takes at least 50 miles to clear most codes after you disconect the battery. Some 100 miles. If its going to come back on Ive seen them as early as 28 miles.
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Old 03-17-2014, 01:39 PM
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http://vehicle-maintenance.wonderhow...s-test-410289/

my 1999 Chevy 1/2 ton didn't pass the first time, good thing that it was actually a PRE TEST & not the actual test that gets turned into the DMV

the smog tech told me to do a series of driving actions to retrain the computer
I recall stopping on a highway on ramp & accelerating to a certain speed & holding it for something like 1 mile & coming to a Stop, then i continued on going through the rest of the actions, i think that all together i drove about 15 miles before turning around & returning to the smog inspection place.
I did pass that test that time

This is more like what you are asking about, the Not Ready part
http://www.vehicletest.state.ma.us/m...emissions.html
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Old 03-17-2014, 02:02 PM
Sumguy Sumguy is offline
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I found my OBD code reader. It's an Autel Geniscan GS100. When I plug it into the port, with the ignition off, it says C.A.N. on the first line and something under that. According to the pdf manual that I found on-line, it's supposed to say "GENISCAN OBD II" but I don't see that. If I press the "READ" button, it says "Link ..." and then after a minute it says "Link fail".

If I turn the ignition to ON (but don't start engine) and then press READ, it displays "Link..." and then after about 30 seconds or a minute it says "NO CODES".

Can someone explain why they didn't have enough brains when they were designing this system to include a code that would indicate the "drive cycle" wasn't completed or was still in progress?

I'm reading all sorts of nonsense on the web about what exactly constitutes a "drive cycle" for this particular vehicle. Did Chrysler not publish a definitive description of the drive cycle for the 2001 Dodge Ram / 5.2L?

If the equipment used to "test" the emissions system is just a code reader, then why is their equipment able to know that the drive cycle hasn't been performed? Why can't my el-cheapo code reader also tell me that?

Last edited by Sumguy; 03-17-2014 at 02:05 PM.
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