This instruction show you guide on how to use repair AGCO EEM4 engine trouble code K5128 coolant pressure sensor voltage above normal or open circuit.
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Description
The measured coolant pressure sensor voltage signal is above the normal operating range.
Possible causes are:
The coolant pressure sensor wiring is defective. (Shorted to high source or an open circuit.)
The coolant pressure sensor is defective.
Reaction in EEM
The FC is stored and the warning lamp is activated. The CAN message indicates active fault.
Solution
First save the error log and then erase it. Restart the ECU after erasing the error log. If the fault occurs again during the next driving cycle, check the following paths:
Check the coolant pressure sensor wiring, the connectors and the contact surfaces of the connector pins (possible oxidation).
Check the operation with another coolant pressure sensor to see if the coolant pressure sensor is defective.
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