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 MANUALSCHEVROLET1989HI-CUBE 5.7 K, 475/M40REPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEM6.2L CEC TESTINGDIAGNOSIS & TESTINGCODE 23 - THROTTLE POSITION SENSOR MISADJUSTEDDIAGNOSTIC AIDS
1989 Chevrolet Hi-Cube 5.7 K, 475/M40
Diagnostic Aids
1989 Chevrolet Hi-Cube 5.7 K, 475/M40SECTION Diagnostic Aids
Disregard Code 23 if "SERVICE ENGINE SOON" light goes out as soon as throttle is returned to idle.
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.