2002 Chevy Impala Fault Code PO128

2002 CHEVROLET IMPALA
73,000 MILES • 6 CYL • FWD • AUTOMATIC
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OMBENA
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PO128 appeared on my car while driving down the highway. I cleared the code with my MemoScanner (no freeze codes) and have driven the car 2-300 miles without any code coming on. Yesterday I drove the car on a 100 mile trip and checked the coolant operating temperature with my scanner and it was 88Celsius/190F. It indicates cool but it appears it's running at normal operating temperature. Does this mean the temperature sensor is bad?

Thanks, OMB
Dec 7, 2009 at 9:16 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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