CAT 3406E (Prefix 5DS or 1LW) Fault Code: 36 PID: 84 SPN: FMI: 2 Vehicle Speed signal invalid

The ECM detects the following conditions:

The vehicle speed signal indicates a constant MPH.
The "VSL Protection" parameter is programmed to a value that is less than 2120 rpm.

Probable Causes:

1) Fuel system restriction (Uncommon, but possible)
2) If speedometer is not accurate, then ECM is not programmed correctly
3) Vehicle speed sensor
4) Vehicle speed sensor wiring
5) ECM Connection/Harness
6) Speedometer failure
7) ECM Failure

CAT 3406E (Prefix 5DS or 1LW) Fault Code: 35 PID: 190 SPN: FMI: 0 Engine Overspeed Warning

CAT 3406E (Prefix 5DS or 1LW) Fault Code: 34 PID: 190 SPN: FMI: 2 Primary Engine Speed Loss of Signal

CAT 3406E (Prefix 5DS or 1LW) Fault Code: 32 PID: 91 SPN: FMI: 8 Throttle Position Invalid

CAT 3406E (Prefix 5DS or 1LW) Fault Code: 31 PID: 84 SPN: FMI: 1 Vehicle Speed loss of signal

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