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Home >> Toyota >> 2018 >> RAV4 XLE, FWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> SFI System [2AR-FE] (Diagnostic Codes) (Except Hybrid) (3 Of 7) >> SFI System >> DTC P0128: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) [08/2014 - 10/2015] >> Description

DTC P0128: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) [08/2014 - 10/2015]: Description

HINT: 

This DTC relates to the thermostat.

This DTC is stored when the engine coolant temperature does not reach 75°C (167°F) despite sufficient engine warm-up time having elapsed.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
  1. All of the following conditions are met for 5 seconds (2 trip detection logic):
  2. (a) Cold start.
  3. (b) The engine is warmed up.
  4. (c) The engine coolant temperature is less than 75°C (167°F).
  • Thermostat
  • Cooling system
  • Engine coolant temperature sensor
  • ECM
 Comes on DTC stored DTC for Mexico Models
- Applies
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