20 Most Recent 1994 Cadillac DeVille Questions & Answers


These are for 4.9L


P016-generator voltage out of range--Voltage is below 10 volts or above 16 volts with engine at 500rpm.

P030-Idle speed control (ISC) out of range--Check ISC for operation

A047-very low A/C refrigerant condition warning--check refrigerant level

I039-speed sensing suspension (SSS) fault--this one requires a lot of testing. Could be anything from bad connection at a strut, to bad ground, to bad strut.

I041-battery voltage too low--at 800 rpm, voltage is less than 10.6 volts

I052-keep alive memory error--means IPC lost voltage, and reset. Normal if battery was disconnected, or lost voltage.


These codes are for 4.6L


I039-loss of road sensing suspension (RSS) data--might need to replace rss module

P016-generator voltage out of range--same as above.


If you need anything else, let me know.

1994 Cadillac... | Answered on May 27, 2020


You can check on line from the different parts stores of visit your neighborhood store. They will probably need to order it. A Cadillac Dealership may have one in stock.

1994 Cadillac... | Answered on Feb 28, 2020


Is there a trunk release button in the glovebox?

1994 Cadillac... | Answered on Feb 27, 2020


What makes you think engine is too hot ?

1994 Cadillac... | Answered on Jun 15, 2019


follow the fat air intake hose from the air cleaner

1994 Cadillac... | Answered on Mar 02, 2019


If you're finding it difficult to service/
repair your car i know a website that has every info on all vehicles and vehicle problems, with their solution In detail.. it's www.reliable-store.com

1994 Cadillac... | Answered on Mar 09, 2018


Might be the neutral safety switch. Is the security ligt blinking?
Do It Yourself Diagnosis and Repair

1994 Cadillac... | Answered on Jan 27, 2018


I would take it to the dealer immediately, as it sounds like the traction control is spontaneously being activated

1994 Cadillac... | Answered on Jan 20, 2018


You can check the trouble codes (DTCs) with a code reader and go from there, but unless you have the necessary repair skills, you should leave it to a dealer or reputable repair shop.

1994 Cadillac... | Answered on Jan 16, 2018


Check fuel filter!

I’m happy to help further over the phone at https://www.6ya.com/expert/pat_7f6b46a4565f904d

1994 Cadillac... | Answered on Dec 28, 2017


Given the age of the vehicle, it will be difficult to find a service manual, but that's what you need. You can also try Alldatadiy.com.

1994 Cadillac... | Answered on Oct 24, 2017


I039 is a road sensing suspension problem, I042 is battery voltage too high. I would first try to clear the codes and try to figure out why the voltage is too high - often a faulty regulator in the generator.
You also seem to have a battery drain problem - something besides the keep-alive circuit is drawing it down. First check all lights (including trunk and under hood) and the rear air compressor when the car is turned off.
Road sensing problem could because of the high voltage, but could also be one of the height sensors at each wheel is detached or broken, or the RSS module has given up the ghost.

1994 Cadillac... | Answered on Sep 12, 2017


Although the fault may be in the mirror itself (like a switch), wiring and connector is above the headliner, and that is what you need to check.

1994 Cadillac... | Answered on Aug 03, 2017

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