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Questions and Answers

Dodge RAM DTCs P0336, P1689, P1693

Q. Hello, I have a 1999 Dodge RAM 3500 5.9 liter diesel turbo and manual transmission that I got error codes on, but no help. When cold, it always starts. I can drive it for awhile and it will loose power, the tachometer quits and if I kill it, it won't usually start for awhile. The Check Engine Light stays on. The codes that were given me are:

Dodge RAM DTCs P0336, P1689, P1693
  • P0336 - Ckp Signal Error
  • P1693 - DTC Detected in PCM
  • P1689 No Com between ECM & Ins

I would appreciate your help with these codes. It has 140,000 miles. The tachometer will randomly work and quit.

Thanks,
Donny

A. Okay, first the DTCs.

  • P0336 - Indicates a problem with the voltage signal from the Crankshaft Position Sensor (CKP).

    POSSIBLE CAUSES:

    • DTC not = To freeze frame DTC
    • Ckp sensor ground circuit open
    • Ckp wiring harness intermittent defect
    • 5-volt supply circuit open
    • 5-volt supply circuit shorted to ground
    • Ckp sensor signal circuit open
    • Ckp sensor signal circuit shorted to ground
    • Crankshaft position sensor def
    • Engine control module defective

  • P1689 - Indicates a Data link failure between ECM and fuel injection pump. Low power, engine dereated or engine stops.

    POSSIBLE CAUSES:

    • Fuel Inj pump Gnd ckt open or high resistance
    • Fuel pump ctrl mod harness observable defect
    • Datalink (+) circuit open
    • Datalink (+) circuit short to ground
    • Datalink (-) circuit open
    • Datalink (-) circuit short to ground
    • Engine control module defective

  • P1693 - Indicates a fault code has been generated in the companion engine control module.

P0336 is saying you probably have a bad CKP. Here are the diagnostic charts for DTC P0336:

Dodge RAM DTCs P0336, P1689, P1693
Dodge RAM DTCs P0336, P1689, P1693
Dodge RAM DTCs P0336, P1689, P1693

Here are the diagnostic charts for DTC P0336:

Dodge RAM DTCs P0336, P1689, P1693
Dodge RAM DTCs P0336, P1689, P1693

Some of these tests require the Chrysler DRB scan tool, but there are electrical tests listed you can do to find the problem.

Additional Information provided courtesy of AllDATA

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