Question about 1990 Buick Century

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Code26and27prolemona1990buickcentury ineedtoknowwhatcode26quaddrivermodule(a)operatesordrivessoicantraceoutmycodefaultandgetmycarsmogedthankyou

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Code 26 is caused by the quad driver module receiving an incorrect voltage.
Check your battery charge/voltage is sufficient - a dodgy battery can mess with this. Otherwise check the QDM and wiring for faults.
I'm reasonably sure your code 27 doesn't specifically refer to another problem in that model
Hope this helps, Sherwin

Posted on Dec 24, 2009

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Posted on Jan 02, 2017

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