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Spn 639 Fmi 9, NOTE: If other codes • The ECM (or another SAE
Spn 639 Fmi 9, NOTE: If other codes • The ECM (or another SAE J1939 device) tying up communications by sending too many consecutive messages • The external OEM controlling device has failed or The SPN 639 FMI 9 code indicates a fuel delivery or injection timing issue causing hard starts. Learn what causes it, how to diagnose it, and the exact steps to fix it. Disconnect the TECU connector. Communication between the electronic control module (ECM) and another The codes it throws are as follows: S. 3. 3 SPN 563 FMI 14 OC 127 S. I have same issue same code SPN 639 FMI 2 my question is, what ended up being the issue? 639 spn fault code name is J1939 Network #1, Primary Vehicle Network. Cummins Tier 4 Fault Codes. Low Battery Voltage: Triggers network CAT FMI 639 fault code description. The ECM / ECU also attaches a text description to the message that is transmitted over the J1939 data link.
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