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What causes the engine code P0027 to be set on a 2009 GMC 7500 7.8L Isuzu engine?

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What causes the engine code P0027 to be set on a 2009 GMC 7500 7.8L Isuzu engine?

Vehicle: 2009 GMC 7500 7.8L Isuzu

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Hi there,

This code indicates an issue with the exhaust valve control. Here is a list of possible causes.

P0027 - Exhaust Valve Control solenoid Circuit Range/Performance Bank 1
Read more: https://www.autocodes.com/p0027.html

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