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What causes codes p1594,230,1693 on my 99 dodge Cummins 5.9?

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  • Dodge Master
  • 354 Answers

When diagnosing a multi code vehicle, you have to start with the lowest code number first. P0230 is a code for the lift pump circuit. This does not necessarily men the lift pump is bad. It means the circuitry has a problem. It's an electrical issue. Does the vehicle start okay and run?

The second code, P1594, is a code for the alternator is charging at too high of a voltage. You can easily check that by using a meter to check the battery voltage when the vehicle is running. Any over 14 3/4 volts is considered high.

The last code, P1693, is a 'chump code'.c it simply means that there is a code stored in one of the computers in the vehicle. The ECM is probably reading the PCU that has the P1693 because of the codes in the ECM. Anyway, if you get through the first 2, P1693 will stay off when the codes are cleared.

Good luck,
Vinnie

Posted on Apr 16, 2015

  • Anonymous May 13, 2015

    Currently got it tore apart had change oil pan out &ran into few other issues but wanted to THANK YOU A LOT!!!! For replying to my question man u don't kno how much it means to me!!! Is there anyway I can get ur email address??? It b greatly appreciated. ,mine is shewmakerpettyjohn@gmail.com...once again THANKS!!!!

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Posted on Jan 02, 2017

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SOURCE: my 97 dodge cummins 3500 shuts off when put in

i have seen the trans torque converter caus e this problem before..torque converter locking up inside stallin engine

Posted on May 22, 2009

  • 99 Answers

SOURCE: 1999 DODGE CUMMINS SHUT DOWN FAULT CODES p1689, P1688

P-1689 NO COMMUNICATION BETWEEN ECM & INJECTION
PUMP MODULE

Posted on Jul 21, 2009

tburtk
  • 158 Answers

SOURCE: 2004 dodge 2500 with cummins diesal engin light

your code is PCM/ECM power input signal intermittent. this is ussually a sign of a bad connection whether it be in a connector or a short or brake in a wire.

Posted on Feb 02, 2010

nicole99wu
  • 1049 Answers

SOURCE: 1999 Dodge/cummins can the P0122 code cause my

this obd2 trouble code table can help you understand the meaning of code, for this code, you can try:
Carefully check the throttle position sensor (TPS), wiring connector, and wiring for breaks, etc. Repair or replace as necessary
Check the voltage at the TPS (refer to a service manual for your vehicle for specific information). If the voltage is too low that is indicative of a problem. Replace if necessary.
If recently replaced the TPS may need to be adjusted. On some vehicles the installation instructions call for the TPS to be properly aligned or adjusted, consult a repair manual for specifics.
If there are no symptoms at all, the problem may be intermittent and clearing the code may resolve the issue temporarily. If this is the case then you should definitely check the wiring to be sure it's not rubbing on anything, grounding, etc. The code may come back.

Posted on Sep 08, 2011

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Just bought. 5.9 cummins Can`t get it to start without pushing gas pedal slightly. Runs good after warms up. Still have to give it fuel to start.


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Disconnect the PCM harness connector(s).
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02 dodgeram 2500 4x4 manual tran with 24valve 5.9 cummins lift pump went bad than after replacing truck ran rough intermittinally + ck eng lite comes on, so replaced vp inj pump n lost 1 code still 4...


high voltage is an indication something is not plugged in or plugged in wrong. You will need to test the harness to see if the required voltage supply is present, connector unplugged, if not then your going to have to determine if the siganl comes from the PCM or the fuse block. If its the PCM you may have a bad PCM. Same thing for the ground side. Now if the reference signal and ground are good you could have a sensor issue but I doubt this because you have high voltage on three components. This tells me that three component signals are not getting back to the PCM. This is why it sets the codes. With all the work you just did I suspect you didnt but the wiring back the way it was. Sometimes people take the ground wire off between the engine and and body because its in the way and don't reinstall it. Or don't tighten it enough. With todays electronics there simple mistakes cause unforeseen issues.

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SYMPTOM
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1 Answer

My 97 dodge cummins 3500 shuts off when put in


i have seen the trans torque converter caus e this problem before..torque converter locking up inside stallin engine

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