Check Engine Light Problem

Clovisdodge · 07-04-2008, 04:00 PM

I know that lots of folks have check engine light problems and I've had them before. So here is my latest--I am repeatedly getting three codes--622, 1689 and 1693. Usually the engine will hesitate slightly--like no acceleration-for a second before the CE comes on. Sometimes I can go 300 miles before it happens and sometimes it will repeat in 20 miles. I had it in the shop and right now they are saying it is a communications problem but they want more time to diagnose the problem. Trouble is we are leaving on a trip shortly and I need to have confidence my 1998 24-valve 3/4 ton dodge won't die on me. Any thoughts on what I should be looking for? Thanks.

Clovisdodge · 07-10-2008, 10:11 PM

I posted my problem and never got a single reply.

***BILLS06*** · 07-10-2008, 10:22 PM

P1689 No Communication Between ECM & Injection Pump Module
P1693 is a companion code, nothing to worry about.
P0622 Alternator Field Improper Switching- Sounds like a dying alt. Is it charging normally?

Did the shop find the communication problem?

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Ops · 07-11-2008, 03:52 PM

1689 is usually a death code for the IP. The little computer on top of the injection pump lost its electronic mind..

If you are lucky it may be a spurious code due to voltage spikes in the electrical system caused by the failing alternator.

Try disconnecting the alternator and drive it a few miles.

Ops

__________________
01 QC, tow package, 4X4, 33" Hankooks, Edge EZ, 4:10s with LS, 5" straight pipe. Updated May 07: Holley Black on the frame rail, ISSPRO fuel pressure guage. Modified heachache rack, brush guard, 100w driving lights. Goerend triple disc and VB.

pro99 · 07-11-2008, 07:55 PM

Quote:

Originally Posted by Ops

The little computer on top of the injection pump lost its electronic mind..
Ops

Thats a good way of putting it

But yes it sounds like you need to get a injection put on there before it does leave you stranded

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07-04-2008, 04:00 PM	#1 (permalink)
Clovisdodge Newbie Join Date: Jul 2008 Posts: 2 Clovisdodge's Truck Pics	Check Engine Light Problem I know that lots of folks have check engine light problems and I've had them before. So here is my latest--I am repeatedly getting three codes--622, 1689 and 1693. Usually the engine will hesitate slightly--like no acceleration-for a second before the CE comes on. Sometimes I can go 300 miles before it happens and sometimes it will repeat in 20 miles. I had it in the shop and right now they are saying it is a communications problem but they want more time to diagnose the problem. Trouble is we are leaving on a trip shortly and I need to have confidence my 1998 24-valve 3/4 ton dodge won't die on me. Any thoughts on what I should be looking for? Thanks.

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07-10-2008, 10:11 PM	#2 (permalink)
Clovisdodge Newbie Join Date: Jul 2008 Posts: 2 Clovisdodge's Truck Pics	I posted my problem and never got a single reply.

07-10-2008, 10:22 PM	#3 (permalink)
*BILLS06* Smash "n" Grap Join Date: Nov 2007 Location: Baker, MT Posts: 973 BILLS06's Truck Pics	P1689 No Communication Between ECM & Injection Pump Module P1693 is a companion code, nothing to worry about. P0622 Alternator Field Improper Switching- Sounds like a dying alt. Is it charging normally? Did the shop find the communication problem? __________________ 06 QCSB Capped Rail Airaid Baffle Delete MagHytec Transmission Pan Aeroturbine Muffler Fluidampr Superchips Pyro/Boost & Autometer Ultra Lite Digital Oil Pressure & Transmission Temp Gauges ATS 5 Star TC Flexpiped CAT DDR Enabled Royal Purpled EZ Down Weston Nerf Bars Spray In Bed Liner Valley Gooseneck Hitch http://www.myspace.com/montanadodge

07-11-2008, 03:52 PM	#4 (permalink)
Ops Diesel Freak Join Date: Aug 2006 Location: Middle of PA Posts: 501 Ops's Truck Pics	1689 is usually a death code for the IP. The little computer on top of the injection pump lost its electronic mind.. If you are lucky it may be a spurious code due to voltage spikes in the electrical system caused by the failing alternator. Try disconnecting the alternator and drive it a few miles. Ops __________________ 01 QC, tow package, 4X4, 33" Hankooks, Edge EZ, 4:10s with LS, 5" straight pipe. Updated May 07: Holley Black on the frame rail, ISSPRO fuel pressure guage. Modified heachache rack, brush guard, 100w driving lights. Goerend triple disc and VB.