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Active Code 128 4 4

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using PTT software, there is no guided diagnostics, we swapped pump four with pump 5 and it did not follow. this is definetely an electrical problem.

If the FMI is 4 that means voltage low or open circuit. If your engine ECM is mounted up on its edge on the driver side of the engine, pull the top/J1 connector loose and check for antifreeze or oil in the connection. Wire number for the # 4 eup are EJ1-24-2.0 and EJ1-41A-2.0 . Which would be pins 24 and 41 in the engine top/J1 connector.
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