1995 Cadillac Deville codes

1995 CADILLAC DEVILLE
132,000 MILES • V8 • 2WD • AUTOMATIC
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SIERRAGT2006
  • MEMBER
  • 2 POSTS
what do these mean.
current code po30
history codes po31, po39,po52,po55,po98.
Help would be great.
Nov 15, 2009 at 3:59 AM
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FACTORYJACK
  • ✓Experienced Mechanic
  • 4,159 POSTS
4.9 or 4.6 makes no difference:

P030 ISC RPM out of range
P031 shorted map sensor
P039 TCC engagement problem
P052 keep alive memory reset(can happen with dead/discon. battery)
P055 Closed throttle rpm out of range

P098 High RPM P/N to D/R shift under ISC(this code applies to 4.9l only)
Nov 15, 2009 at 4:47 AM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
P030 current and P055 history, instruction is to repair P055 first clear codes, then see if any reset, here's the t/s flowchart for P055:


https://images.2carpros.com/forum/automotive_pictures/62217_55a_1.jpg


https://images.2carpros.com/forum/automotive_pictures/62217_55b_1.jpg


https://images.2carpros.com/forum/automotive_pictures/62217_55c_1.jpg

Nov 15, 2009 at 5:13 AM
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SIERRAGT2006
  • MEMBER
  • 2 POSTS
Thanks for all help.
Nov 17, 2009 at 5:49 AM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
Your welcome.
Nov 17, 2009 at 6:33 PM
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