Service soon light on and code 52

Tiny
PIATKOWSKI000
  • MEMBER
  • 1984 CADILLAC DEVILLE
  • 4.1L
  • V8
  • RWD
  • AUTOMATIC
Hello.

Today I start it after 3 weeks and "service soon" light comes up. I checked on car computer what code is it and it show me something like that:
-I.8.8 30 52
I remember car sometimes show me code 52 but earlier it looks little different:
-I.8.8 .7.0 52
After that I start engine and "service soon" light don't comes up again.
Car runs for about 30 minutes and I turn off and turn on the engine and "service soon" light does not come up. What is mean and is it still 52 code? Can I drive with it?
Thank you very much for any help.
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Sunday, February 23rd, 2014 AT 6:12 AM

2 Replies

Tiny
CADIEMAN
  • MEMBER
52 is the battery disconnect code. Your doing that to get rid of the code. To clear the computershim and him and by holding down the off and low buttons until you see 00. Then push the off and high buttons until you see 00 then both computers will be cleared.
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Monday, February 24th, 2014 AT 10:28 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

To answer your question, Code 52 indicates that the "long term" memory in the ECM has been reset. This will be the case whenever power is removed from the ECM (i.e. disconnecting battery cables, disconnecting P-1 (blue) ECM connector, etc.) This code should be "cleared" from memory after restoring the ECM's power supply.

Now what that means is battery power was lost for enough time for the ECM to lose memory. If you disconnected the battery trying to reset the light, that would have caused the code.

However, that doesn't explain why the engine stalled and the light is on. What I suggest is to scan the computer to determine what new codes are now stored. This vehicle has an OBD1 diagnostic system. It doesn't require a scanner to retrieve codes. All that will be needed is a short jumper wire or even a paper clip. Here is a link that explains how it works.

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Once you do this, let me know what codes were retrieved. Also, you asked if it was safe to drive. Take a look through these links. They discuss your concerns.

https://www.2carpros.com/articles/check-engine-light-top-ten-reasons

https://www.2carpros.com/articles/check-engine-light-top-ten-reasons

https://www.2carpros.com/articles/check-engine-light-is-it-safe-to-drive

_____________________________

Let me know if this helps or if you have other questions.

Take care,
Joe
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Friday, April 3rd, 2020 AT 7:29 PM

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