Trouble code P0420 means:Catalyst system efficiency below threshold (bank 1)
Code PO420 is catalytic converter efficiency low bank 1
Well, honey, to clear the code on a Cadillac Eldorado 1999 for the service stability system, you'll need a fancy OBD-II scanner. Plug that bad boy in, find the option to clear codes, and let it work its magic. Just remember, clearing the code won't fix the underlying issue causing the stability service light to come on, so you might want to get that checked out too.
DISSCONECT YOUR BATT FOR 10 seconds...........there you have it
hold off and warmer button at same time on heater controls
catalyst system fault
The interior color code for a 1996 Cadillac Eldorado can vary based on the specific trim and options chosen for the vehicle. Common interior color codes for that model year include "19" for Dark Gray and "54" for Light Gray. To find the exact code for a specific vehicle, it’s best to check the manufacturer's label located on the driver’s side door jamb.
Cylinder 8 misfire detected Often the front coil pack failing. Burning up the #8 sparkplug is a common indicator.
Do didn't say which engine you have. The trouble code PO420 is telling you there is a catalystic converter not doing it's job. We need to know which engine and what year you have in order to determine which cat is at fault.
It's Catalyst system efficiency below threshold
P0071-Ambient Air Temp. Sensor Range/Performance
Trouble code P0603 means:Internal control module,keep alive memory (KAM) error
Code SO38 on a Cadillac Eldorado typically indicates a problem with the vehicle's anti-lock brake system (ABS). An easy fix can often involve checking and cleaning the ABS wheel speed sensors and their connections, as dirt or corrosion can lead to faulty readings. Additionally, ensuring that the brake fluid level is adequate and that there are no leaks in the brake system can help resolve the issue. If these steps don't clear the code, further diagnostics may be needed to identify underlying issues.