Question about 1996 Dodge Dakota

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How can I check to see If a SMEC is bad without going to major repair shop? Can"t spend money on replacement without being sure.

Hand held, for checking faults, gives me link-error. unit has worked in the past. Kill relay will not energize. have no engine icon on dash anymore. have also tried ignition on / off system to retrieve any codes or clues.

Posted by Anonymous on

5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

hotrodshop
  • 106 Answers

SOURCE: I have a 2003 dodge ram 1500 with a V-8 4.7 engine

The leak in your evap system is very small at .020. It is more than likely a small split in a hose somewhere. The cap is probably ok, we rarely find a bad one. If it is a small split in a hose it will only get larger over time. Here is the factory info on the code. We have found that alot of these leaks are from a small hose on the evap canister under the vehicle, but with out looking at your vehicle it is hard to say. If the leak goes away or is no longer large enough to be detected, your light will go out after a few days. These leaks are emmissions related and will not effect the integrity of the vehicle. I would have it checked and corrected if the light stays on at your convienience.

Symptom List:
P0442-EVAP LEAK MONITOR MEDIUM (0.040) LEAK DETECTED
P0455-EVAP LEAK MONITOR LARGE LEAK DETECTED
P0456-EVAP LEAK MONITOR SMALL (.020) LEAK DETECTED
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0442-EVAP LEAK MONITOR
MEDIUM (0.040) LEAK DETECTED.
When Monitored and Set Condition:
P0442-EVAP LEAK MONITOR MEDIUM (0.040) LEAK DETECTED
When Monitored: Immediately after a cold start, with battery/ambient temperature
between 40° F and 90° F and coolant temperature within 10° F of battery/ambient.
Set Condition: If there is a leak larger than 0.0409 and smaller than 0.0809 in the
evaporative system.
P0455-EVAP LEAK MONITOR LARGE LEAK DETECTED
When Monitored: Immediately after a cold start, with battery/ambient temperature
between 40° F and 90° F and coolant temperature within 10° F of battery/ambient.
Set Condition: There is a leak larger than 0.0809 in the evaporative system.
P0456-EVAP LEAK MONITOR SMALL (.020) LEAK DETECTED
When Monitored: Immediately after a cold start, with battery/ambient temperature
between 40° F and 90° F and coolant temperature within 10° F of battery/ambient.
Set Condition: There is a leak larger than 0.0209 and smaller than 0.0409 in the
evaporative system.
POSSIBLE CAUSES
LEAK AT GAS CAP
VEHICLE HISTORY AND SERVICE BULLETIN INVESTIGATION
VISUAL AND PHYSICAL INSPECTION
VERIFY EVAPORATIVE EMISSION SYSTEM LEAK
EVAP PURGE SOLENOID OPERATION
INTERMITTENT LDP MONITOR FAILURE
EVAPORATIVE EMISSION LEAK DETECTION
GAS CAP
LDP COMPONENT LEAK

Posted on Jun 12, 2009

  • 1 Answer

SOURCE: Check Engine LIght Problem code P1491

Don't rush to replace the fan itself until you have tested it. Check the fan relay and relay fuse inside the vehicle. Hopefully it will be just a failed relay and replacement ($12 at dealer) or/and an inexpensive 10amp or 30amp fuse. There can be multiple issues causing this code.

In my case, the fan relay failed (burnt). 2000 Dodge Durango. The PCM was also damaged and requires replacement, awaiting delivery. A remanufactured PCM can be purchased online for substantial less than at the dealer. We tested the fan by supplying power directly to the fan and it runs fine. We had to remove a cover (easy to remove) under the vehicle near the fan to gain access to the connector Use a fused link for testitng to prevent damage during the test. Using a multimeter, I found power 12.5volts from the 30amp fuse circuit which supplies the power for the fan, 12.5 volts from the PCM circuit with the key on, but only 5.16volts from the 10amp fuse circuit with the key on. A continuity test showed the 10amp fuse inside the fuse box inside the vehicle was good. The 30amp fuse in the power distribution box was good when tested for continuity. Checked resistance on all curcuits and they were well within limits. I also checked the wiring to the fan for continuity and resistance. After my tests were completed, a Dodge technican concluded the PCM is bad and is not grounding the circuit as it should. If you want to troubleshoot this yourself, see if your local library has access to ALLDATA which will have diagnostic information and the diagrams of the circuit involved. A Haynes manual for the vehicle, I purchased one at Autozone, can be helpful also.

Posted on Jul 27, 2009

  • 1986 Answers

SOURCE: My 2002 Dodge Grand Caravan eL has been acting up

It may be your TPS may be faulty. It may also be your EGR, but the symptom with that would also include jerking and bucking of the car.

Posted on Aug 21, 2009

  • 8 Answers

SOURCE: 2002 Dodge Durango 4.7L V8 Check Engine Codes

1st try and search for a vaccum leak, due to the fact that these vehicles have had some bad problems with the length of wires and hoses, if there is a vaccum leak in the vehicle somewhere that will trigger other malfunctions in your vehicle. Using a can of starting fluid or Brake cleaner spray lightly spray around our engine til you hear the motor rev-up and the spot you have sprayed will determine where your vaccum leak will be. And then check under your distributor cap for any moisture be sure to take a rag and wipe and residue off. Also check the firing order on your distributor.

Posted on Oct 28, 2009

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Unless you have the special tools necessary to get the door panels off without any damage to them then I'd let a shop do the repairs. There's going to be some broken parts inside the door latch too, so it may be too much of a job anyway.

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What if the car is stuck in limp mode and it loses power?


if it won`t start call a tow truck to take it to a shop. if you don`t want to spend the money for a tow you won`t want to spend the money to repair the car anyways.

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My 2003 chevy malibu is overheating, and the heat doesnt come on inside. whats wrong with it? i had someone check it and they said it could be my thermostat, water pump or something about my radiator.


What your were told may be the case

You also could have a bad head gasket & major
repair, you suggest you can not do

No quick fixes & no guessing, as you want us to do

You need to leave a vehicle at a shop, until they
do the proper testing & actually find the problems
& be prepared to pay for diagnostic time

A long list of things will not help, if you do not work on
you own vehicles & I would never suggest you take a
guess from a source like you went to or a web site,
even if the guessing happened to be correct

Have to find a problem through proper testing
You only want the best most skill folks working on
your products. Stay away from the franchise places

Gender plays no role there
You never spend money on what is not needed,
if you find a good shop that has been there for decades

The shop has to know what your expectations are & you need
to be there during part of the testing & know what is taking place

Have the shop prove out the testing & problems to you

Repairs are only made & you only part with money on your terms
& every aspect of your dealings should be in writing, before they
even approach your vehicle. Your car,your in charge,then no stereo
typing or concerns

Jul 16, 2014 | 2003 Chevrolet Malibu

1 Answer

1997chevy tahoe wont drive except in 3rd gear


Im sorry for this bad news but It seems like you need a major tranny job. I would go for an used one. Don't spend money trying to fix this problem doing something else because that's just like putting it in the trash can. Im sure your tranny has gone bad.
Please don't forget to rate me

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I have a 2000 Nissan Xterra, when I first got it the ABS light came on and I had the whole module replaced (2004) approximately a year ago it came back on. I understand that a sensor is probably bad but I...


I would suggest finding out what code there is causing the light to come on. Some parts stores or repair shops can retreive the code which should tell you where and what to check.

Oct 18, 2010 | 2000 Nissan Xterra

1 Answer

Shuts off a few time while driving


I recommend taking the vehicle to a shop that does scope testing aka oscilloscope testing. This way they can pinpoint the problem and do the repair without the guess work.Saves you time and money.

May 07, 2010 | 2005 Chevrolet Malibu

2 Answers

Car continues to misfire. Replaced spark plugs, wires, coils, module, fuel pressure regulator, and injectors. What else is left to do, without spending more money!!!!!!!


Guessing is the way to spend the most amount of money. After spending a lot of money guessing, most people dont want to spend money fixing the real problem, which in all cases, cost less than what they have spent. A shop will need to take it from here, First is to narrow down which cylinder is misfiring then go from there, Check fuel trims, compression, Vac leak, signal from the injector to the ecm. The injector is hot and the ecm grounds it. You dont say which engine you have, but the 2.4L have had a lot of coil housings go bad.

Nov 23, 2009 | 2001 Pontiac Grand Am SE

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Major service


WELL DEPENDING ON WHAT TYPE OF SERVICE YOU ARE TRYING TO DO. IF ITS JUST PREVENTIVE MAINTENCE THEN I WOULD GO TO A LUBE SHOP YOU WOULD BE LOOKING AT ABOUT 600.00 TO 700.00 DOLLARS TO HAVE EVERYTHING DONE

Jul 06, 2009 | 2002 Honda Odyssey

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Service engine soon light,


I would take it to a major auto parts store and they have diagnostic machines to check your system for errors and let you know what they are. they will also clear them to and the light will go off. But this is the most accurate way of knowing without spending a lot of money

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