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#2017 ford f350 6.7 engine coolant over temperature how to#
#2017 ford f350 6.7 engine coolant over temperature code#

However, you don’t ever want to jump to conclusions and replace the thermostat without a complete diagnosis. In fact, it’s considered the most frequent repair for the fault. The majority of mechanics will agree that the most obvious cause of P0128 is a defective thermostat.

#2017 ford f350 6.7 engine coolant over temperature how to#

RELATED: 6 Causes of a Cold Lower Radiator Hose (& How to Fix it ) Common P0128 Diagnosis Mistakes

Replace intake air temperature (IAT) sensor.

Replace coolant temperature (ECT) sensor.

Here are a few of the possible solutions: That’s why it’s vital to perform an in-depth diagnostic examination before deciding on the repair. However, there are multiple repairs that could fix the fault. In the majority of cases, the thermostat needs to be replaced to fix the P0128 trouble code. In the end, it can create engine damage, which is expensive to repair. Extended use of an engine that’s too cold can lead to performance issues and a drop in fuel economy. You should have the fault repaired as soon as possible. However, you don’t want to overlook the damage that can be done when operating an engine that won’t reach proper temperatures. Medium – Having an engine that doesn’t reach normal operating temperatures isn’t nearly as dangerous as one that overheats.

Defective intake air temperature (IAT) sensor.

Malfunctioning coolant temperature (ECT) sensor.

Defective cooling fan (doesn’t turn off).

However, there are other possible conditions you should consider. This part is needed to control engine temperature.

#2017 ford f350 6.7 engine coolant over temperature code#

The most common cause of the P0128 trouble code is a stuck open thermostat. Motor temperature drops down while driving at high speeds.Engine takes longer to reach normal operating temperature.Engine doesn’t reach normal operating temperature.Here are the most frequent symptoms occurring with P0128: There aren’t many symptoms that this condition will cause, making it simple to pinpoint the problem. The most common symptom with the P0128 trouble code is the inability to get the engine temperature up to normal operating specifications. It also looks at the speed of the vehicle, the engine coolant temperature (ECT) sensor and the intake air temperature (IAT) sensor reading. To determine if the engine has reached normal operating temperatures, the ECM examines the length of time that the vehicle is running. The Engine Control Module (ECM) is responsible for monitoring the ambient temperature and determining if it is in line with manufacturer specifications. P0128 – Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) What Does the P0128 Code Mean?Ĭode P0128 indicates that the engine coolant hasn’t gotten hot enough in the appropriate timeframe. Mechanics Tips about the P0128 Code Code Definition