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

113,615

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 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?

113,615

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 people found this helpful.

Thank you again!

Your Answer

Ram 1500

Looking for a Used Ram 1500 in your area?

CarGurus has 9,549 nationwide Ram 1500 listings starting at $800.

ZIP:

Dodge Ram 1500 Experts

  • #1
    Dan Connell
    Reputation
    6,960
  • #2
    pudgybear
    Reputation
    6,620
  • #3
    dandyoun
    Reputation
    6,180
View All

Related Models For Sale

Used Ford F-150
2,344 Great Deals out of 215,477 listings starting at $1,300
Used Chevrolet Silverado 1500
1,781 Great Deals out of 149,285 listings starting at $1,495
Used Dodge Ram 2500
147 Great Deals out of 4,934 listings starting at $2,495
Used GMC Sierra 1500
722 Great Deals out of 58,462 listings starting at $1,900
Used Toyota Tundra
478 Great Deals out of 38,526 listings starting at $1,999
Used Toyota Tacoma
439 Great Deals out of 44,078 listings starting at $1,995
Used Ford F-250 Super Duty
374 Great Deals out of 42,218 listings starting at $1,600
Used Dodge Dakota
68 Great Deals out of 3,085 listings starting at $1,800
Used Ford Mustang
270 Great Deals out of 37,082 listings starting at $2,150
Used Dodge Ram 3500
74 Great Deals out of 2,162 listings starting at $5,980

Used Cars For Sale

2010 Dodge Ram 1500 For Sale
49 Great Deals out of 1,218 listings starting at $4,800
2009 Dodge Ram 1500 For Sale
47 Great Deals out of 963 listings starting at $4,500
2008 Dodge Ram 1500 For Sale
67 Great Deals out of 1,402 listings starting at $3,995
2007 Dodge Ram 1500 For Sale
39 Great Deals out of 1,307 listings starting at $3,999
2006 Dodge Ram 1500 For Sale
37 Great Deals out of 1,030 listings starting at $2,950

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.