FixVault
Home
›
Mazda
›
2003
›
Protege5 Automatic
›
Repair and Diagnosis
›
Engine Performance
›
System
›
Engine Controls - Self-Diagnostics
›
Diagnostic Tests
›
DTC P0126 & DTC P0128
›
Notes
DTC P0126 & DTC P0128: Notes
Code Definition
DTC P0126: Coolant thermostat stuck open.
DTC P0128: Coolant thermostat stuck open.