Question about 1989 Chevrolet S-10 Blazer
Service Engine Light does not iluminate, we purchased a code reader but without the light it does not work. How do we fix the "service engine lights?
The check engine light is turned on by the ECM. (computer) Make sure the bulb is good. For a 1989 you don't need a code reader, just an ALDL grounding tool to read out codes.
Posted on Sep 07, 2009
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Posted on Jan 02, 2017
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May 06, 2015 | 2006 Buick Lucerne CXL
Hello read and understand why.
When the service engine soon light (Also called the check engine light or engine management light) is turned on this is to alert you to the fact that Powertrain Control Module (computer) has detected a failure somewhere in the systems it controls you may not feel any difference in the way the engine runs, this can be the transmission or the engine or emission system, there are fault codes set in the modules memory for these faults. What needs to happen now is to have the powertrain control module scanned with a special tool called an OBD2 electronic engine control scanner or a OBD2 code reader. Once the code(s) are read then you must perform the diagnostics for each code and make the appropriate repairs based on the findings of the diagnosis that was performed, this is called doing "Pinpoint" testing.
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