Fault
Thermostat stuck open
The thermostat does not close so the engine never reaches its normal operating temperature.
Cooling
Faults
Fault
Coolant sensor reading wrong
The coolant temperature sensor reports a value away from true so fuelling and fan control are wrong.
Fault
Failed head gasket
The head gasket no longer separates a combustion chamber from the coolant jacket so combustion gas pressurises the cooling system.
Fault
Stuck thermostat
The thermostat does not open so coolant cannot circulate to the radiator.
Fault
Toyota Camry Water Pump Leak
The Toyota Camry is commonly reported to experience a coolant leak from the water pump, often associated with the 2012–2017 model years.…
SeverityModerate
Fault
Kia Sportage Cooling Fan Resistor Fault
The Kia Sportage is commonly reported to experience a cooling-fan resistor fault, often associated with the 2017–2021 model years. It can show…
SeverityModerate
Fault
Ford Focus: 1.0 EcoBoost Cooling System Failures (2015–2016)
Some 1.0L EcoBoost Focus engines are commonly reported (especially in Europe) to lose coolant from degraded hoses or cracked components, risking sudden…
SeverityHigh
Fault
Toyota Corolla: Water Pump and Coolant Leaks (2009–2013)
Weeping water pumps and slow coolant loss are commonly reported on 2009–2013 Corollas. Caught early it is a routine repair; ignored, it…
SeverityModerate
Cars
Car Page
Ford Focus Common Problems
The most-reported Ford Focus problems are powershift (dps6) transmission shudder (2012–2016), door latch concerns (2012–2016), and 1.0 ecoboost cooling system failures (2012–2016).…
Car Page
Toyota Corolla Common Problems
The most-reported Toyota Corolla problems are oil consumption reports (2009–2010), electric power steering complaints (2009–2010), and water pump and coolant leaks (2009–2013).…