Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK1989SKYHAWK BASE, 2D COUPE, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSIS2.8L VIN [W] PFI TESTS W/CODESDIAGNOSIS & TESTINGCODE 44, LEAN EXHAUST INDICATIONNOTES
1989 Buick Skyhawk Base, 2D Coupe, Automatic
Code 44, Lean Exhaust Indication: Notes
1989 Buick Skyhawk Base, 2D Coupe, AutomaticSECTION Notes
NOTE:
Test numbers refer to test numbers on diagnostic chart.
- Code 44 is set when the oxygen sensor signal voltage on circuit No. 412 remains less than .2 volt for at least 60 seconds and the system is operating in "closed loop".
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.