Question about 2000 Dodge Ram 3500

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Posted on Jul 21, 2009

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1688 is telling you that you injection pump is dead time to install a new VP44 pump 1689 is more then likely set by the 1688 problem

Posted on Aug 27, 2010


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2003 Alfa 156 JTS Fault codes P0120,P1121,P1122, P1682,P1687 & P1688 The engine has an idle speed of 1250/1600 rpm will not fall lower even when hot. It feels lumpy when driving at low speed. I changed...


I own a alfa 156 jts, and have the same problem, first I cleaned the maf sensor, then I changed the pedal assy. It came back. Now I have changed the Throttle body Ass\'y ( TPS) and it has fixed the problem. Also a new set of plugs will fix the lumpy problem?

Sep 11, 2013 | 2000 Alfa Romeo 156

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1999 dodge 3500 5.9L diesel dtc's p0251 ,p1688

P0251 Injection Pump Fuel Metering Control "A" (Cam/Rotor/Injector)
P0252 Injection Pump Fuel Metering Control "A" Range/Performance (Cam/Rotor/Injector)
P1688 Metering Oil Pump Stepping Motor Circuit Malfunction
MB Star V2013.03

May 04, 2013 | Cars & Trucks

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Limp mode on Mazda RX8

I am really sorry but this is way over the head of most owners, you need the factory manuals and the special training and equip to diagnose this and repair it.

Jun 14, 2012 | Mazda RX8 Cars & Trucks

2 Answers

Limp mode oil metering pump

P1688 - Metering Oil Pump Stepping Motor Circuit Malfunction

You need to see the dealer on this ASAP, do not drive this car.

Jun 14, 2012 | 2005 Mazda RX-8

1 Answer

2000 jeep grand cherokee laredo showing code p1686, p1687, p1688, geuges go down, all warning lights come on, with time, the geuges comes on, and the warning lights come off, all but the security key...

Diagnostic Fault Code (DTC) P1686 has a generic description of "No SKIM Bus Nessage Received".
Diagnostic Fault Code (DTC) P1687 has a generic description of "No Instrument Cluster Bus Message"

P1688 is either not a valid code for your vehicle, or the manufacturer failed to provide specific information for it.
Basically, what is going on here is that you have a problem in your computer network communication bus. Or to put it more simply, the "phone line" is down. Your computers in your vehicle are having problems talking to each other.

"SKIM" stands for Sentury Key Imobilizer Module (AKA security module). The Instrument cluster and the SKIM are not communicating with the Powertrain Control Module (PCM) for sure, and possibly also not communicating with the Body Control Module (BCM). There may also be problems with other modules that share the same data lines.
This MUST be diagnosed with a scan tool that can access the entire computer network. You must find out which modules can communicate with the scanner and which ones cannot. This is necessary to determine the possible location of the fault.

Nov 07, 2011 | 1999 Jeep Cherokee

1 Answer

Have trouble codes p1688&p1689

p1688 Internal Fuel Injection Pump Controller Failure, p1689 No Communication Between ECM & Injection Pump Module

Feb 06, 2011 | 1999 Dodge Ram

1 Answer

I am getting codes P1688 and P0254 on 2000 Dodge Ram 3500. Do these codes indicate I need to change the injector pump?

means u hav too much pressure in pump--shud be inspected by a pro-also a haynes manual is helpful-may need a rebuild--library has chilton books

Oct 20, 2010 | 2000 Dodge Ram 3500

1 Answer

Truck turns over. Is getting fuel but just wont fire.

check the codes by turning the key on off on off on-no start ,look at the odometer and watch for codes p0216-p0215-p1688 if you have these you need a new injection pump there are a list of code that will cause this

Aug 17, 2010 | 2000 Dodge Ram 3500

1 Answer

Cummins verry rough idle no throttle response

Thanks for the info!
Lets start from scratch and see if we have a mechanical or electrical problom Disconect the batterys both positve and negitve
let it sit for a 1/2 hour. Then hook the batterys up try and start it.
lets see if you get a check engine light or if wee need to go intothe mechanical end, Ill be here on and off most of the day

Jul 13, 2010 | 1998 Dodge Ram 2500 2WD

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