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2001 Cadillac Deville DHS idling low...stalling
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jcarp3
New User
Jun 8, 2011, 11:09 AM
Post #1 of 2
(9310 views)
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2001 Cadillac Deville DHS idling low...stalling
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I just bough a 2001 Cadillac Deville DHS a few weeks back with 119.000 miles on it...after a week it kept stalling and would not start at all...I had it towed to AAA and they said I needed the MAP sensor replaced...It started up fine when I picked it up from AAA, however later that day when i tried to start it it stalled again...but i could actually get it started now if i kept my foot on the gas..it only stalls occasionally on me..My car occasionally idles very low too...around 500 rpms..if im driving and let my foot of the gas for a bit it stalls then too...any help would be very appreciated.
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Double J
Veteran
/ Moderator
Jun 8, 2011, 7:07 PM
Post #2 of 2
(9273 views)
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Re: 2001 Cadillac Deville DHS idling low...stalling
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#02-06-04-019: 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) - (Apr 9, 2002) Condition 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. Cause The above conditions may be caused by multiple concerns with the crank sensor or the PCM. Correction 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: Subject: 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) Models: 2000-2001 Cadillac DeVille, Eldorado, Seville 2001 Oldsmobile Aurora with 4.0L or 4.6L Engine (VINs C, Y, 9 -- RPOs L47, LD8, L37) • Inspect both of the crank sensor terminals for signs of poor connection or corrosion of both crank sensors. Pin drag test all four terminals. • Inspect the crank sensor circuit wires for signs of damage. • Inspect the crank sensor circuits at the PCM for poor connections. The crank sensor terminals should also be drag tested. • Remove the crank sensors and check for any debris on the sensor. • Verify crank sensor location (A on the bottom and B on the top) and verify that the sensor circuit wires are in the correct cavities. • Inspect the date code on the sensor. If it is before 0276, replace the crank shaft sensor and perform case learn. • If the date code is past 0276, verify the PCM grounds. A voltage drop test should be less than 20 mV. • If the PCM ground circuit verification is acceptable, then follow published PCM diagnostics. Parts Information Parts are currently available from GMSPO. Warranty Information For vehicles repaired under warranty, use: • Verify the system power and ground connections for the PCM. • Verify crank sensor location (A on the bottom and B on the top) and verify that the sensor circuit wires are in the correct cavities in the harness. • Remove the crank sensors and check for any debris on the sensor. • Verify that the fuel pressure regulator is not leaking fuel past the diaphragm. • Perform the injector balance drop test and verify even pressure drops on all injectors. • Inspect and clean the EGR passages, as necessary. • Inspect and clean the IAC passages, as necessary. Part Number Description Qty 12559529 Crankshaft Position Sensor - Upper 1 12559530 Crankshaft Position Sensor - Lower 1
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