Question about 1996 Cadillac DeVille

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Prndl switch problem error code e91 and ee 91.92 cadillac deville

Prndl switch problem error code e91 and ee 91. stutters when engine hot and hardly goes anywhere......i need help!
92 cadillac problems

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The switch on top of the transmission where the shift cable is . it probly is not anny good. check all wiring . make sure thair is no dirt inside the connector

Posted on Mar 24, 2010

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Posted on Jan 02, 2017

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How do you find fault codes on a 91 cadillac deville


Turn your key to run (engine not running).
Press and hold the OFF and Warmer buttons on your A/C Heater Control Head.
All the segments will light up.
Look over at your FDC (Fuel Data Center).
Codes will be ran starting with E, then EE, then F, then FF and ending with .7.0.
The E codes are engine codes (current and history) and the F codes are body.

Oct 23, 2013 | Cadillac DeVille Cars & Trucks

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What's the meaning of E91,and F47 error codes on


Use Google to get the answer


GM/Cadillac OBD1 Codes E91 & F47

Aug 22, 2013 | Cars & Trucks

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Giving the code E.27


E27 Open Throttle Switch Signal here is a list of all codes E12 No Distributor Reference Signal E13 Oxygen Sensor Not Ready E14 Shorted Coolant Sensor E15 Open Coolant Sensor E16 Generator Voltage Out of Range E19 Shorted Fuel Pump Circuit E20 Open Fuel Pump Circuit E21 Shorted Throttle Position Sensor E22 Open Throttle Position Sensor E23 EST Signal Problem E24 Speed Sensor Circuit Problem E26 Shorted Throttle Switch Circuit E27 Open Throttle Switch Signal E30 ISC RPM Out Of Range E31 Shorted MAP Sensor Signal E32 Open MAP Sensor Signal E34 MAP Sensor Signal Out Of Range E37 Shorted MAT Sensor Signal E38 Open MAT Sensor Signal E39 VCC Engagement Problem E40 Power Steering Pressure Switch Signal E41 Cam Sensor Signal Problem E44 Oxygen Sensor Signal Lean E45 Oxygen Sensor Signal Rich E47 BCM to PCM/ECM Data Problem E48 EGR System Problem E52 PCM/ECM Memory Reset E53 Distributor Signal Interrupt E55 Closed Throttle Angle Out of Range E58 Pass Key Control Problem E60 Cruise - Not In Drive E61 Cruise - Vent Solenoid Problem E62 Cruise - Vacuum Solenoid Problem E63 Cruise - Set Speed vs Vehicle Speed E64 Cruise - Acceleration Too High E65 Cruise - Servo Position Signal Problem E66 Cruise - Engine RPM Too High E67 Cruise - Switch Shorted E68 Cruise - Command Problem E70 Intermittent TPS E71 Intermittent MAP E73 Intermittent Coolant Sensor E74 Intermittent MAT Sensor Signal E75 Intermittent VSS Signal E80 Fuel System Rich E85 Idle Throttle Angle Too High E90 Cruise - VCC Brake Switch Signal Problem E91 Cruise - PRNDL Switch Problem E92 Heated Windshield Request Problem E96 Torque Converter Overstress E97 P/N To D/R Engagement Problem E98 P/N To D/R ISC Engaged Problem E99 Cruise - Servo Apply Problem

Jul 31, 2013 | 1992 Cadillac DeVille

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What does this codes po91 mean


The computer has detected a problem with the transmission range (PRNDL) switch

May 13, 2013 | 1994 Cadillac DeVille

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2000 Cadillac Deville No sign of transmission failure, turned off car went to start it again acted like battery was dead... then secound try started it. Only now it wont shift in to gear. the dot on the...


No the torque converter clutch solenoid won't have anything to do with it . More then likely it's the internal mode switch . This tell's the computer which gear is selected , then the PCM energizes the correct shift solenoid . The PCM will send this info to the instrument cluster over the class 2 serial data network . The instrument cluster has a microprocessor with logic programmed into it. More then likely has DTC'S - diagnostic trouble codes stored in one of the computers on the vehicle . Your best bet , take it to a qualified repair shop .

The internal mode switch (IMS) is a sliding contact electrical switch assembly that corresponds to the PRNDL position selected. Each of the PRNDL positions has a unique ground pattern on the four wires from the PCM. The IMS consists of two major components: The housing, which houses the tracks and makes up the stationary contacts. The insulator assembly makes up the moving contacts and is linked to the detent lever. The range detection is accomplished by securing the moving contacts of the IMS to the detent lever. When the driver selects a PRNDL position, the detent lever inside the transaxle rotates. This slides the IMS moving contacts which in return grounds the four wires in a unique pattern for each gear selection corresponding to the PRNDL position selected. The IMS is electrically connected by five wires (four of which the PCM supplies voltage to and one wire that is a common ground) to the transaxle pass through connector.
PRNDL Display
The IPC is equipped with a vacuum fluorescent (VF) PRNDL display. The IPC PRNDL information is received from PCM via class 2 serial data message.

Turn OFF the ignition.
Install a scan tool.
Start the engine.
Place the gear shifter in the following gears:
• PARK
• REVERSE
• NEUTRAL
• DRIVE
Observe the IMS parameter in the powertrain control module (PCM) data display.
Does the scan tool indicate that the IMS parameter is the same as the PRNDL display for all gears?

Feb 17, 2018 | 2000 Cadillac DeVille

1 Answer

Codes e31 e52 e91


P0031....HO2S Heater Control Circuit Low (Bank 1 Sensor 1)


P0052....HO2S Heater Control Circuit High (Bank 2 Sensor 1)

code 91 does not exist

Dec 02, 2010 | 1992 Cadillac DeVille

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MAJOR CADILLAC TROUBLE!!! I got my valve cover gaskets replaced and now my car accelerates funny. It feels like I my car is shifting gears bad and my car always reads 0mph no matter how fast I go. I...


Take the vehicle back to the place that created that all those issues.
You should not have to worry and look for answers. We can not help you over the internet
If it always read zero,not to be hurtful,that is neglect on your part. Have these problems checked out within days, of them first showing up.
You have had issues from the moment your speed indicator failed to work correctly. Most likely you fix that, and all you crazy codes go away.

Sep 19, 2010 | 1992 Cadillac DeVille

1 Answer

Need to know what these codes mean E98 E91 .EE ..E E52 1991cadillac deville


e52 is ecm memory reset
e91 park neutral safety switch
e98 transaxle shift fault

Jul 07, 2010 | 1991 Cadillac DeVille

1 Answer

I pulled up the codes and e91 come up what is it how do i fix it


PRNDL SWITCH PROBLEM IS E91 ACCORDING TO THE BOOK, I LOOKED IT UP IN.

PRNDL stands for Park, Reverse, Neutral, Drive, Low, the same things found on your automatic transmission shifter labels.

The switch is probably bad. Replace it or check connections to it, or check that the Reverse lights go on when the indicator says it is in Reverse on the Dash.

SES light may be on due to this problem.

Maybe not rotated or calibrated right to the shifting positions. I never had this problem in a 1990 Cadillac Deville which is similar to yours.

Good luck.

Jul 03, 2010 | 1991 Cadillac DeVille

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