Asked in Chevy Blazer
Chevy Blazer

What does the trouble code 44 mean for a 1994 full size blazer?

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Wiki User
07/10/2009

Code 44- Lean exhaust indicated. Check for possible lean fuel possibilities, such as low pressure caused by faulty regulator, fuel pump or fuel lines kinked or partially collapse, vacuum leaks, clogged air filter or fuel filter.. Check wiring and connections to O2 sensor. Check ground terminals to ecm. Replace O2 sensor.