2001 Cadillac DeVille - Answered Questions & Fixed issues


Why don't u try online
some websites deal in it real time.. along with solutions to problems how to repair fix service nd all
reliable-store is pretty good.. they also have live assistance

2001 Cadillac... | Answered on Mar 01, 2019 | 23 views


W age of car..mounts probly worn as well as steerin parts . If shakes wile drivin then tires or balljoints bad..this can b dangerous..u can buy good used tires but b joints can collapse rite on interstate. Seek an old school mech and not a dealr

2001 Cadillac... | Answered on Feb 02, 2019 | 64 views


Unfortunately, the website I found says there is no on-board method of programming your car for a new key-fob. You have to take the car to a dealer or to a key-maker (who may only charge half as much as the dealer)

Key Fob Remote Programming Instructions 2001 Cadillac Deville Key Fob...

2001 Cadillac... | Answered on Jul 20, 2018 | 475 views


Hi, The clicking you hear is the anti theft system has been triggered, beneath the steering column pull down the fuse cover and locate the (ECU) fuse Labeled so on cover and owners manual. Remove (ECU) fuse turn ignition to on only, do not start, wait 3 minutes turn off ignition remove key, reinstall (ECU) fuse. Try starting Vehicle!

2001 Cadillac... | Answered on Feb 21, 2018 | 86 views


The transmission sounds like it was over-filled. - you must always check the fluid level only when the transmission is at full operating temperature. The fluid volume increases a lot as it heats to operating temperature, and if overfilled, will come out the filler tube. To avoid seal problems, I would take it back to the mechanic and ask him to remove some of the fluid to bring it back in line with the dipstick markings.

2001 Cadillac... | Answered on Feb 12, 2018 | 112 views


Look no further for help, try this website ?reliable-store com I've bought it from various websites so I know how each site deals.
like for me best is reliable-store com
they also have this live chat feature that girl can help you right there

also another one is manualslife com but they don't have any such live assitance feature.. actually none do except this one that's why it's good. Other wise manuals are best here both websites

2001 Cadillac... | Answered on Feb 09, 2018 | 70 views


The stock harness was butchered, possibly to allow the separate amplifier to be bypassed. My guess is that the stock amplifier is still in place but not connected to the radio.

2001 Cadillac... | Answered on Jan 22, 2018 | 50 views


You might have to go to a Cadillac dealership to get it reset. Some sections of the computer are locked out so only the manufacturer can fix it.

2001 Cadillac... | Answered on Jan 15, 2018 | 97 views


Sounds like the built in computer is not working anymore best git down to yer local caddie dealer ship and git them to do a diagnostic test fer around $20 and that'll tell ya whats wrong with it.

2001 Cadillac... | Answered on Jan 06, 2018 | 33 views


I use a pin or needle to unplug mine

2001 Cadillac... | Answered on Dec 31, 2017 | 131 views


here's a way to check for leaks assuming your not in minnesota and its 30 below zero.
Fill a spray water bottle with water and then put a teaspoon of soap in the bottle..shake.
Squirt the soapy water onto the air fittings to test for leaks. If the fitting bubbles up, then you have a leak. In that case, tighten the fitting with a wrench, or remove and reinstall the fitting with thread sealant.
Undo the fitting with a wrench. Apply two wraps of Teflon tape around the fitting, then tighten the fitting and test again.
If the fitting still leaks, you may have a cracked fitting. Replace the fitting and reinstall, then test again.
Hope this helps.

2001 Cadillac... | Answered on Dec 27, 2017 | 57 views


Wouldn't hurt to get another opinion before resigning yourself that only a dealership might have the sophisticated equipment to unlock and reprogram everything to get it running again.
You know how luxury cars have more bells and whistles than base models, and therefore more expensive to fix or diagnose.

GM techs use a hand held scanner called a Tech-II scanner that communicates with the pcm and can command certain tests or functions. Maybe you could find an independent shop with this capability and experience. It would be a lot cheaper than going to the dealer, but you may be forced into that route if your car's computer has to be reprogrammed. Get a second opinion.

2001 Cadillac... | Answered on Oct 02, 2017 | 80 views


Hose may have split . Try squeezing the hose when engine is cooled off and see if it drops out near the clamp .

2001 Cadillac... | Answered on Aug 15, 2017 | 72 views


Not sure exactly what you mean by "no dampening" but chances are excellent that shock was overextended and you now have a bad shock.

2001 Cadillac... | Answered on Jun 24, 2017 | 34 views


Start with looking at scan data on a scan tool , not a code reader
If the PCM detects a MAP sensor signal voltage that is excessively low, DTC P0107 will set.
The PCM calculates a predicted value for the MAP sensor based on throttle position and engine speed. The PCM then compares the predicted value to the actual MAP sensor signal. DTC P0106 will set if the MAP sensor signal is not within the predicted range.
This does not mean the sensor is bad ,could be a wiring problem ,computer etc....
P0306 is a misfire on cylinder # 6 This would be a good one to start with , could ruin the CAT .
The powertrain control module (PCM) uses dual crankshaft position (CKP A and CKP B) sensors in order to determine crankshaft position.
If the PCM determines that CKP sensor A is at fault, DTC P0335 will set. The PCM will switch from angle based mode to Time Based mode B using CKP sensor B signal input.
Diagnostic Aids
If the condition is intermittent, refer to Intermittent Conditions in Symptoms.
Ignition system DTCs set with the ignition in the START position if the starter relay or the starter is inoperative. When the PCM enables starter operation, the PCM also initiates the diagnostic test routines for DTCs P0335, P0340, and P0385. The PCM will not receive signal input from the CKP and CMP sensors if a condition exists which prevents the engine from cranking. When this occurs, the DTCs will set.
If DTC P0615 is set, diagnose DTC P0615 first. If DTC P0335, P0340, and/or P0385 are set and no trouble is found, check for the following conditions:
• Is there a no-crank condition or an intermittent no-crank condition?
• Was an attempt made to crank the engine with the shift lever not in P/N?
Procedures for Selecting Crank Position Sensing Decode Mode
Diagnosing the crankshaft position sensors may require enabling a specific decode mode (Angle, Time A, or Time B). To enable a specific crank decode, using the scan tool, perform the following steps:
• Turn the ignition to the RUN/ON position.
• Select Engine Output Controls.
• Select Crank Position Sensing Decode Mode.
• Select the desired mode (Angle, Time A, or Time B) by pressing SELECT STATE.
• Command the decode mode by pressing COMMAND STATE.
The commanded state remains valid for the current ignition cycle. A specific decode mode can not be commanded with the engine running, or after commanding a desired decode mode. To command a different decode mode, you must cycle the ignition OFF and ON.

DTC P0385
The PCM uses two basic methods of decoding the engine position: Angle Based and Time Based (using either CKP A or CKP B sensor input). During normal operation, the PCM uses the angle based method. In order to operate in this mode, the PCM must receive signal pulses from both CKP sensors. The PCM uses the signal pulses to determine an initial crankshaft position, and to generate MEDRES (24X reference) and LORES (4X reference) signals. Once the initial crank position is determined, the PCM continuously monitors both sensors for valid signal inputs. As long as both signal inputs remain, the PCM will continue to use the angle based mode.
When either CKP signal is lost, the PCM will compare the MEDRES signal to the camshaft position (CMP) sensor signal. If the PCM detects a valid CMP signal, and the MEDRES to CMP signal correlation is correct, the PCM determines that CKP sensor A is at fault. However, if the MEDRES to CMP correlation is incorrect, the PCM determines that CKP sensor B is at fault. If the PCM determines that CKP sensor B is at fault, DTC P0385 will set. The PCM will switch from angle based mode to Time Based Mode A using CKP sensor A signal input.

DTC P0410
Circuit Description
The secondary air injection (AIR) pump used on this vehicle lower tail pipe emissions during start-up. The AIR system consists of the following items:
• The AIR pump
• The shut-off valves
• The vacuum control solenoid valve
• The system hoses and piping
• The AIR relay, the fuses, and the related wiring
The powertrain control module (PCM) uses the AIR relay in order to control the AIR pump. The PCM also controls the AIR vacuum control solenoid valve that supplies vacuum to the AIR shut-off valves. With the AIR system inactive, the AIR shut-off valves prevent air flow in either direction. With the AIR system active, the PCM applies ground to the AIR relay, and the vacuum control solenoid valve. Fresh air flows from the pump, through the system hoses, past the shut-off valves, and into the exhaust stream. The air helps the catalyst quickly reach normal working temperature; thus lowering the tail pipe emissions on a start-up. The PCM tests the AIR system for the following conditions:
• AIR System (Overall system including both banks, and results in DTC P0410)
• AIR System Bank 1 (DTC P1415)
• AIR System Bank 2 (DTC P1416)
• AIR Relay (DTC P0418)
• AIR Vacuum Control Solenoid (DTC P0412)
The PCM runs two tests to diagnose the AIR system: Passive, and Active. Both tests involve a response from the fuel control HO2 sensors (HO2S Bank 1 Sensor 1 and HO2S Bank 2 Sensor 2). If both passive tests pass, the PCM takes no further action. If either part of the passive test fails, or is inconclusive, the PCM initiates the Active tests. If the PCM determines that the HO2S voltages did not respond as expected during the tests, the DTC will set. For further information concerning the AIR System and system tests, refer to

DTC P0506 DTC P0507
The idle air control (IAC) valve is located in the throttle body. The IAC valve consists of a movable pintle, driven by a gear attached to an electric motor called a stepper motor. The IAC valve motor is a 2-phase bi-polar permanent magnet stepper motor that is capable of highly accurate rotation, or movement, every time the polarity of a winding is changed. This change in polarity can be seen when observing a test lamp connected between ground or B+ and an IAC valve circuit while the powertrain control module (PCM) is attempting to change engine RPM. The test lamp will flash on or off each time the polarity is changed. The PCM does not use a physical sensor to determine IAC pintle position, but uses a predicted number of counts, one count represents one change in polarity which equals one step of the stepper motor. The PCM counts the steps that have been commanded in order to determine the IAC pintle position. The PCM uses the IAC valve to control engine idle speed by changing the pintle position in the idle air passage of the throttle body. This varies the air flow around the throttle plate when the throttle is closed. In order to determine the desired position of the IAC pintle at idle or during deceleration, the PCM refers to the following inputs:

Important: Ensure that the engine speed stabilizes with each commanded RPM change in order to determine if engine speed stays within 100 RPM of the commanded RPM.
Set the parking brake, and block the drive wheels.
Install a scan tool.
Start the engine.
Turn OFF all the accessories.
With the scan tool RPM control function, slowly increment engine speed to 1,700 RPM, then to 600 RPM, then to 1,800 RPM.
Exit the RPM control function.
Does the engine speed stabilize within 100 RPM of the commanded RPM during the above test?


011 Idle Speed Problems Scan Data For Idle Control

016 Engine Misfire Crank and Cam Signals

2001 Cadillac... | Answered on Jun 15, 2017 | 247 views


The transmission range switch could be bad , but ,without testing that is a guess . That's why the AAA guy had you try it in neutral an park . Do you know what a park netural safety switch is . The trans range switch is an input to the PCM/ECM engine computer ! The PCM/ECM shares this info to the instrument cluster over the class 2 serial data communication network , do you know about networks for the computer system on your vehicle. What happens when you turn the key to start your vehicle ?
Starting System Circuit Description
Moving the ignition switch to the CRANK position sends a 12 V signal to the PCM ignition crank request input. The PCM verifies that it has received a valid theft password from the vehicle's theft deterrent module and that the transmission is in the PARK or NEUTRAL position. The PCM then grounds the control circuit of the START 1 relay. When the START 1 relay is energized it completes the B+ voltage circuit to the starter solenoid S terminal.
With the line under the PRNDL not registering/displaying it sounds like a range sensor switch problem . This could be very challenging even to a professional Technician . At the dealer i would hook up the Tech 2 scan tool an see the range switch data at the PCM . Easy as pie . Someone without that tool have to do testing with a volt meter , find the connector at the transmission or PCM ,which ever is easiest to get to .Also checking DTC'S - diagnostic trouble codes at all modules on the vehicle . There are videos on youtube on testing range sensor switch , park neutral safety switch .

2001 Cadillac... | Answered on May 06, 2017 | 77 views


if the front stays up the compressor is working
what you have indicates the ride levelling valves to the rear are not working properly
you can test the compressor by attaching a pressure gage to the outlet side

2001 Cadillac... | Answered on Apr 12, 2017 | 195 views


The torque converter can't stop working. The converter clutch can, but it won't cause the symptom you're having and neither will the solenoid. Check the fluid level, low level can cause the symptom you're having. If it does this more when cold than hot and/or does it more on hills it's a good indication of low fluid.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/oscar_403cc49e0f00cda7

2001 Cadillac... | Answered on Apr 11, 2017 | 34 views

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