What's up with my 5.7 ECT sensor

Asked by Guru2T2W2 Feb 24, 2020 at 12:16 PM about the 2001 Chevrolet Express G3500 LS RWD

Question type: Maintenance & Repair

Hi, I just replaced my ECT sensor and now the
gauge pegs to high when the engine warms up
(hose still cool). Is this a reset issue or a defective
product?

1 Answer
80

GuruRSWSY answered 4 years ago

When the sensor is cold is should have high resistance that gradually drops as the sensor warms up... meaning a cold engine or unplugged sensor should show cold on the gauge.. if its showing hot its either a short in the wiring bypassing the sensor or a defective sensor

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