CAT 3126E Fault Code: 128-03 PID: Flash Code 44 SPN: FMI: Secondary Fuel Level voltage high
The ECM detects the following condition:
•The Secondary Fuel Level signal voltage is above the acceptable range for more than 10 seconds.
The fuel level sensors are OEM installed components for the vehicle. The sensors are selectable through a customer programmable parameter and the customer programmable parameter may be protected by customer passwords.
Possible Causes:
1) Loose ECM Connection/Harness
2) Fuel level sensor failure
3) WIring between fuel level sensor & ECM
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SERVICE MANUAL 3000 AND 4000 SERIES GEN 4 GENERATION – ALLISON
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