What do DTC's in history mean?

1996 CADILLAC DEVILLE
59,000 MILES
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ONER59
  • MEMBER
  • 1 POST
PC 1520
TC 0073
RS 0027
PZ 2042
The electronic ride control is not working. Rear of car is too high and there is no dampening in front shocks.

May 13, 2012 at 7:04 AM
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KHLOW2008
  • ✓ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
That means errors had been detected previously and stored in history. If the error did not reoccur, the currect DTC would not show them.

How did you get the trouble codes? They do not seem to be in the correct format.

May 13, 2012 at 7:26 AM
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KHLOW2008
  • ✓ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
RS0027 is rear right damper solenoid valve open circuit. Could be due to a faulty solenoid valve or a break in the wiring circuit.
May 13, 2012 at 7:33 AM
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