Cadillac Repair: Service engine light, cadillac sedan deville, service engine soon light

Question
I have a 1994 Cadillac Sedan DeVille with the 4.9 litre engine.  After driving the car for short time the 'service engine soon' light will come on.  I have checked the computer and it say the following:
P012 HISTORY
P013 HISTORY
P052 HISTORY
P070 HISTORY
NO IPC CODES
NO ACP CODES
NO SIR CODES

I am not sure what to do after this point.

Answer
OK, All you have to do is CLEAR (erase) the codes.

1. Re-enter diagnostics and when you see PCM?  Push and release the HI (^) button on the climate control panel.

2. You will see PCM DATA?

3. Keep pushing and releasing the LO (v) button on the climate control panel until you see PCM CLEAR CODES?

4. Push and release the HI button (^).

5. You will see PCM CODES CLEAR. Wait 3 seconds and turn OFF the ignition.

6. This will CLEAR the codes.