Posts Tagged: thermostat failure

How to Diagnose and Fix a P0128 Trouble Code

Why Your Car Has a P0128 Trouble Code — What It Means and How to Fix It Quick Summary A P0128 code means your engine isn’t heating up to an expected temperature within a predetermined time based on the cold start temperature, the engine RPMs, vehicle speed, and acceleration. In most cases, the cause is a faulty thermostat that is sticking partially open or opening too quickly. It is rarely due to a faulty engine coolant temperature sensor. However, a failing coolant temperature sensor, low coolant, or a cooling fan … Read More