Question about 2002 Chevrolet Blazer
Check for proper fuel pressure, then look for any small vacuum leaks. the computer has gone past it's adaptability range under some circumstances when driving and that's what causes the code
Posted on Jan 23, 2015
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Posted on Jan 02, 2017
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Jan 11, 2015 | 2001 Chevrolet Blazer
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This DTC is more of an informational code, so if there are any other codes set, diagnose them first. If there are no other codes, inspect the intake air system for air or vacuum leaks and damage. If there are no symptoms other than the DTC itself, just clear the code and see whether it returns.
If you have an advanced scan tool that can interact with the car, command the idle higher and lower to see if the engine responds appropriately. Also check the PCV valve to see if it's blocked and needs to be replaced. Check the IAC (idle air controller) if equipped, verify it's operation. If available, try swapping in a new throttle body to see if that fixes the problem. On Nissan Altimas and possibly other vehicles the problem may be fixed by having the dealer perform an idle air relearn procedure, or other relearn procedures.
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