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I intend on giving you the procedure and chart for that code, but I wanted to send you this first. If you get really lucky, it could just be a loose or dirty connection.
Intermittent Engine Idle Instability, Hard/No Restart or Decel Stalls, SES Lamp Illuminated, DTCs P0335, P0336, P0385, P0386 or P1599 May Be Set (Diagnose and Repair)
2000-2001 Cadillac DeVille, Eldorado, Seville
2001 Oldsmobile Aurora
with 4.0L or 4.6L Engine (VINs C, Y, 9 -- RPOs L47, LD8, L37)
Some owners may comment on an intermittent engine idle speed stability concern, hard or no restart condition or a decel engine stall. This may also be accompanied by a Service Engine Soon light being illuminated. Upon investigation, the PCM may indicate one of the following DTC codes: P0335, P0336, P0385, P0386 or P1599.
The above conditions may be caused by multiple concerns with the crank sensor or the PCM.
If the vehicle has any of the crank sensor codes P0335, P0336, P0385, or P0386 set, then the following should be done:
If the vehicle has an idle or decel stall, or near stall concern and only has DTC P1599 set, then the following should be done:
I will be right back with that debug chart for the code, and the procedure for getting to the sensor(s).
I have good news and bad news. Good news - the sensor is relatively easy to replace, and the procedure is below.Bad new - there is a "relearn" procedure that requires a class 2 scan tool (like the dealership uses) to do the job.
Here is the test chart for that code and the schematic that goes along with it in a readable size. The chart is a PDF file that you should be able to view on your computer and print.
Here is the location of the sensors.
Here is the procedure to replace the sensor, and the relearn procedure (both PDF files).
Replace Crank Sensor
One other tip: You do not have to go to a Cadillac dealer to have the work done. Any GM dealership (like Chevy, Pontiac, or Olds) should be able to do the work, and even some independent shops that have the right scan tool that will do the relearn procedure.
I hope this helps.
Take Care, Greg A.
As you look through the procedures (above) you will notice that many of them require the use of a class 2 scan tool, so you might have to take it to someone to look at it.
But before you do that, do a visual inspection of the sensors, connectors, and wiring to see if you can see anything obvious.
Please let me know what you find.
Take Care, Greg A.
Let me check and see if I can get more details. Sometimes the documents do not show everything that needs to be done, and I haven't had my hands on one of these in a while, so it is hard to remember.
After checking my other sources, I did not see any other instructions, but I do have some requests out to a couple of other experts, just in case they have worked on one of these recently.
Sorry for getting back to you so late.
One of the other experts said that you MAY have to remove the oil pressure sensor, but you may be able to just remove the electrical connector and get enough clearance to get to the bolt for the crank sensor.
Here is the procedure for replacing the oil pressure sensor.
Tighten the oil pressure switch to 16 N·m (12 lb ft).
Hi again. Thank you for the accept.
Yes, these motors (and most cars today) are known for their "confined spaces" when trying to work on them.
Please let me know how it turns out.