CAT 3126E Fault Code: 100-04 PID: Flash Code 24 SPN: 100 FMI: 4 Oil Pressure voltage low
The Engine Control Module (ECM) detects the following conditions:
•The signal voltage from the engine oil pressure sensor is greater than 4.95 VDC for more than eight seconds.
•The ECM has been powered for at least two seconds.
•The 168-01 Low ECM Battery Power is not active.
•The 232-03 5 Volt Supply voltage high is not active.
•The 232-04 5 Volt Supply voltage low is not active.
•The engine is not running or the engine coolant temperature is greater than 38 °C (100 °F).
The Engine Control Module (ECM) continuously creates a pull-up voltage on the signal wire for each sensor. The ECM uses this pull-up voltage in order to detect a problem in the signal circuit. When the ECM detects voltage that is above a threshold on the signal wire, the ECM activates a -3 diagnostic code. When the ECM detects voltage that is below a threshold on the signal wire, the ECM activates a -4 diagnostic code.
Note: There may be a delay of 30 seconds in order for Caterpillar Electronic Technician (ET) to display an active diagnostic code. When you check for a diagnostic code, be sure to wait at least 30 seconds.
The most likely cause of a code is a problem with an electrical connector or wiring. The least likely cause of a code is the ECM.
Sensors included:
Fuel pressure sensor
Injection actuation pressure sensor
Barometric pressure sensor
Boost pressure sensor
Engine oil pressure sensor
Probable Causes:
1) ECM Connection
2) Sensor or harness failure
3) Failed ECM
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