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2002 Dodge Ram HELP!!!


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Jake32
New User

Aug 15, 2011, 3:26 PM

Post #1 of 7 (3334 views)
2002 Dodge Ram HELP!!! Sign In

  I have a 2002 Dodge Ram 1500 with a 4.7 engine. In the last month i have had multiple problems with it here is a list of them hope someone has an answer: The brake light is on, the abs light is on, the airbag light is on, the engine light is on, the speedometer does not work, the odometer does not read mileage, the button to turn the a/c compressor on does not work, the switch for the vent to defrost does not work, the back_up lights do not work, and recently the engine has started stalling when i go to stop.Normally I always fix my own vehicle's but this problem i just can't figure out. I have replaced the speed senors and nothing has changed. Any help would be greatly appreciated


nickwarner
Veteran / Moderator
nickwarner profile image

Aug 16, 2011, 6:23 AM

Post #2 of 7 (3293 views)
Re: 2002 Dodge Ram HELP!!! Sign In

Before you replace more expensive parts you need to get the codes read that are present and post them here. We can go through them one problem at a time. It certainly must seem overwhelming. Your brake light comes on from two places. There is a switch in the park brake mechanism and typically one in the master cylinder reservoir for low fluid. Unhook one at a time and see if the light goes off. If its the one in the park brake mechanism ensure that the pedal is fully up. They can look like they are all the way up but be just down enough to turn it on. If in the master cylinder make sure the fluid level is correct. As far as the airbag and ABS lights, it takes a professional scan tool to read those components to get the codes. As far as the rest of the issues lets see what codes come up and take it from there.


(This post was edited by nickwarner on Aug 16, 2011, 6:58 AM)


Jake32
New User

Aug 22, 2011, 12:54 PM

Post #3 of 7 (3266 views)
Re: 2002 Dodge Ram HELP!!! Sign In

The only codes that it reads is a speed sensor and i have replaced both of them


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 22, 2011, 2:03 PM

Post #4 of 7 (3262 views)
Re: 2002 Dodge Ram HELP!!! Sign In

That means that the sensor wasn't the problem and you misdiagnosed it.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Jake32
New User

Aug 22, 2011, 4:42 PM

Post #5 of 7 (3255 views)
Re: 2002 Dodge Ram HELP!!! Sign In

I think I found that out, all i did was change what the computer told me to.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 22, 2011, 4:49 PM

Post #6 of 7 (3253 views)
Re: 2002 Dodge Ram HELP!!! Sign In

The computer didn't tell you to change anything. It merely recorded a particular situation and reported it to you. It's still up to you to determine what the actual cause was. Just because it mentions a sensor, doesn't mean the sensor itself is the cause.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Discretesignals
Ultimate Carjunky / Moderator
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Aug 22, 2011, 5:50 PM

Post #7 of 7 (3248 views)
Re: 2002 Dodge Ram HELP!!! Sign In

You really need to get it to a shop that has a high end scan tool that can access the TCM (Transmission Control Module). A generic code reader doesn't have the capability of accessing the TCM.

The TCM controls the functions of the transmission and also receives the signal from the vehicle speed sensor. The TCM is part of a network with other computers in the vehicle including the PCM. The TCM sends vehicle speed information to the PCM and other modules. The code you received means the PCM didn't get the speed signal from the TCM for some reason. The vehicle speed data in the TCM needs to be analyzed to see if the TCM is actually receiving the signal from the sensor.

Just replacing a sensor because a code's description says something about it doesn't necessary mean the sensor is the actual culprit. There is wiring, connectors, and other items that can make the sensor appear it is bad when it actually isn't the cause.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.






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