QuestionQUESTION: The following codes are showing on my screen/1995 Caddilac Eldorado STS 4.6. so44 history,po52 history,to77history,PCM's?,p109 history, RO15 history, SO17 history,AO11 current,and SO38 current. What are these and what can I do about them, please?
ANSWER: The FIRST thing you need to do is CLEAR (erase) all the codes from the computers and then re-enter diagnostics to see what codes reappear.
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QUESTION: Please tell me how to erase the computer codes Thanks!3my8h
ANSWER: Ignition ON. Engine OFF.
2. Simultaneously push and hold the OFF and WARMER buttons on the climate control panel for 3 seconds and then release them.
3. After all the codes appear the screen will stop at PCM DATA?
4. Press and release the HI button and you will see PCM DATA?
5. Keep pressing and releasing the LO button until you see PCM CLEAR CODES?
6. Push and releas the HI button and you will see PCM CODES CLEAR.
7. Keep Pushing the OFF button until you see PCM?
8. Keep pushing and releasing the LO button until you see RSS DATA?
9. Press and release the HI button and you will see RSS DATA?
10. Keep pressing and releasing the LO button until you see RSS CLEAR CODES?
11. Push and releas the HI button and you will see RSS CODES CLEAR.
12. Keep Pushing the OFF button until you see PCM?
13. Keep pushing and releasing the LO button until you see SIR DATA?
14. Press and release the HI button and you will see SIR DATA?
15. Keep pressing and releasing the LO button until you see SIR CLEAR CODES?
16. Push and releas the HI button and you will see SIR CODES CLEAR.
17. Keep Pushing the OFF button until you see PCM?
18. Keep pushing and releasing the LO button until you see APC DATA?
19. Press and release the HI button and you will see APC DATA?
20. Keep pressing and releasing the LO button until you see APC CLEAR CODES?
21. Push and releas the HI button and you will see APC CODES CLEAR.
22. Turn OFF ignition.
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QUESTION: hello i completed the directions above and here is what shows up now. AO11current;SO17history;SO44history;So38current. Also no PCM,TCS,IPC,SIR codes, thenPCM? Can you please help me?
AnswerA011 = Fault in HIGH SIDE TEMP SENSOR in AC system.
S038 = Electronic level control exhaust valve short to ground or open circuit.
Lets CLEAR the "S" codes AGAIN and see what you get.
1. Ignition ON. Engine OFF.
2. Simultaneously push and hold the OFF and WARMER buttons on the climate control panel for 3 seconds and then release them.
3. After all the codes appear the screen will stop at PCM?
4. Keep pushing and releasing the LOW button until you see RSS?
5. Push and release the HI button and you will see RSS DATA?
6. Keep pushing and releasing the LOW button until you see RSS CLEAR CODES?
7. Push and release the HI button and you will see RSS CODES CLEAR.
8. Wait 3 seconds and turn OFF the ignition.
9. Wait 3 minutes and recheck for codes via previously said in above said steps 1 thru 3.
