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DTC P0128: Thermostat Malfunction
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Typical Malfunction Thresholds
July 1:
So it begins
. Don't worry, this is not in the correct legal jurisdiction!
Typical Malfunction Thresholds
TYPICAL MALFUNCTION THRESHOLDS CHART
Duration that both of following conditions (a) and (b) met
5 seconds or more
(a) Estimated ECT
75°C (167°F) or higher
(b) ECT sensor output
Lower than 75°C (167°F)