ECC issues? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-15-2004, 12:54 AM   #1
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Default ECC issues?

Friday i started my car, and the temperature numbers flashed for about a minute, now they don't anymore, what does this mean, did it store a code? It hasn't at all since then. One other thing, my AC is warm now, probally needs recharging, im just wondering if it has been converted to R-134A.

Is there a way to scan my ECC for codes? if so i will do this at school.
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Old 03-15-2004, 01:32 AM   #2
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Techinfo. 93 was the last year you could perform self-diagnostics through the ECC panel. Good luck.
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Old 03-15-2004, 02:43 AM   #3
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thanks Bill! I will do this tomorrow and post the results, i think it might be Code 66 low Freon as it did this right after i tried the A/C.
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Old 03-15-2004, 03:04 PM   #4
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Code 66 is an interesting code because it is stored in both the PCM and ECC. It has to be cleared from the PCM, not the ECC.
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Old 03-15-2004, 07:50 PM   #5
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So many little letters, im so confused
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Old 03-16-2004, 12:13 AM   #6
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Powertrain Control Module
Electronic Climate Control
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Old 03-16-2004, 02:24 PM   #7
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Oh
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