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P0128
2014 Toyota Camry
Toyota
Severity
Low
Safe to Drive
Yes
Est. Time
1hr
Difficulty
Moderate
SYMPTOM
Heater blows cool air, longer warm-up time
Why This Happens
A stuck-open thermostat allows coolant to circulate before the engine has warmed up, keeping temperature readings artificially low.
VERIFIED FIX:
Thermostat replaced
How It Was Diagnosed
A stuck-open thermostat allows coolant to circulate before the engine has warmed up, keeping temperature readings artificially low.
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