For example, if P0113 is on the list, you will need to check the IAT sensor before proceeding. The DTCs listed may indicate a specific cause or other underlying problems. You can perform a diagnostic scan by connecting an OBD2 scanner to the vehicle’s computer system. The heater is noticeably less effectiveĬhecking the trouble codes that have been registered by the control unit is often the first step for identifying the fault.The engine takes an unusually long time to warm up, especially in cold weather.The control module can malfunction, although this doesn’t occur frequently. If the fan stays on all the time, the coolant will cool down quicker and take longer to warm up. Due to faults, false information could be transmitted to the control module or the transmission could be interrupted. A faulty coolant temperature sensor or IAT device.This means the valve won’t be able to regulate the flow of coolant through the engine. This is the most common cause and it can occur if the cooling system parts are not serviced on time or as a result of corrosion. A thermostat that won’t close or is leaking.This code may indicate that there is a problem with the coolant thermostat. The powertrain control module (PCM) also takes into account the intake air temperature sensor readings. In other words, it hasn’t warmed up quickly enough. The powertrain DTC P0128 is triggered when the coolant temperature sensor readings indicate that the coolant hasn’t reached the correct regulating temperature within a certain timeframe.
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