I just bought a 2000 Dodge Ram 1500 with the 5.9 liter V 8. The speedo and tach don't work so I'm not sure how many miles are on it. Last shown is 148K.

Asked by Mar 30, 2016 at 07:19 PM about the 2000 Dodge Ram 1500 2 Dr SLT Extended Cab SB

Question type: Maintenance & Repair

I just bought a 2000 Dodge Ram 1500 with the 5.9 liter V 8.  The speedo
and tach don't work so I'm not sure how many miles are on it.  Last shown is
148K.  It runs rough when started but then smooths out (mostly) when
warmed up.  It still feels shakey, hesitant and weak however like it's only
running on 7 cylinders.  The plugs are all good and are a frosty white color
(too lean?), the wires, cap and rotor are new.  It's showing codes P0500
Vehicle Speed Sensor Fault as well as P1740 TCM Internal Malfunction.  
I've poured a can of Sea Foam in a fresh tank and have used up about half
the tank but so far no improvement.  I'd really like to get this truck running
100%.  Any advice???
Thanks,
Dave

4 Answers

105,475

The VSS can cause the speedo not to work and give an improper signal to TCM causing it to malfunction. So the first thing to do is to replace the VSS and check the wiring from it make sure it isn't burnt or shredded by rodents, then see if the speedometer works, if it does then clear the computer system and run a relearn cycle and watch for the check engine light to return, if it don't then you can go onto the tach. That is usually the head but it can also be wiring or connection at the cluster. HTH

1 of 1 people found this helpful.

Thanks for your ideas. Ill check / replace the VSS tomorrow and check out the wiring. The tach actually works. The ABS light is also on so looking into that. It could all be related. What do you think about the P1740 TCM Internal Malfunction code?

105,475

Replace the VSS first as it tells the computer the speed and the computer tell the TCM, if there is no signal to the computer to send the computer subs in a value so it will drive but the TCM can misread this value and set a code as an internal error. ABS light can be many things, wheel speed sensors, rabs valves, the pump, you will need the codes for this system also.

1 of 1 people found this helpful.

Thank you again!

Your Answer

Ram 1500

Looking for a Used Ram 1500 in your area?

CarGurus has 11,150 nationwide Ram 1500 listings starting at $1,495.

ZIP:

Dodge Ram 1500 Experts

  • #1
    Dan Connell
    Reputation
    6,550
  • #2
    pudgybear
    Reputation
    6,440
  • #3
    dandyoun
    Reputation
    5,830
View All

Related Models For Sale

Used Ford F-150
3,261 Great Deals out of 223,478 listings starting at $1,200
Used Chevrolet Silverado 1500
2,717 Great Deals out of 175,181 listings starting at $955
Used Dodge Ram 2500
155 Great Deals out of 5,493 listings starting at $2,661
Used GMC Sierra 1500
1,178 Great Deals out of 64,912 listings starting at $999
Used Toyota Tundra
699 Great Deals out of 34,411 listings starting at $1,500
Used Toyota Tacoma
712 Great Deals out of 45,873 listings starting at $2,500
Used Ford F-250 Super Duty
426 Great Deals out of 49,460 listings starting at $1,899
Used Dodge Dakota
84 Great Deals out of 3,639 listings starting at $1,499
Used Ford Mustang
600 Great Deals out of 39,738 listings starting at $1,988
Used Dodge Ram 3500
87 Great Deals out of 2,306 listings starting at $5,999

Used Cars For Sale

2010 Dodge Ram 1500 For Sale
73 Great Deals out of 1,434 listings starting at $5,388
2009 Dodge Ram 1500 For Sale
46 Great Deals out of 1,067 listings starting at $4,990
2008 Dodge Ram 1500 For Sale
71 Great Deals out of 1,646 listings starting at $2,950
2007 Dodge Ram 1500 For Sale
69 Great Deals out of 1,470 listings starting at $1,988
2006 Dodge Ram 1500 For Sale
52 Great Deals out of 1,269 listings starting at $2,650

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.