SPN 100 - FMI 4 (Fault Code 141)
Friday, July 20, 2018
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SPN100 FMI4
Engine Oil Rifle Pressure 1 Sensor Circuit - Voltage Below Normal or Shorted to Low Source
CODES:
Fault Code: 141
PID(P), SID(S): P100
SPN: 100
FMI: 4/4
Lamp: Amber
REASON: Low signal voltage or open circuit detected at the engine oil pressure circuit.
EFFECT: None on performance.
Circuit Description:
The engine control module (ECM) provides a 5 volt supply to the engine oil pressure sensor on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The engine oil pressure sensor provides a signal to the ECM on the engine oil pressure sensor signal circuit. This sensor signal voltage changes based on the pressure in the oil rifle. The ECM will detect a low signal voltage at operating conditions when the oil pressure may be slightly lower. The ECM will detect a high signal voltage during high engine speeds or operating conditions when the oil temperature is low.
Component Location:
The engine oil pressure sensor is located in the oil rifle.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the engine oil pressure signal voltage was out of range low.
Action Taken When the Fault Code is Active:
• The ECM illuminates the amber CHECK ENGINE lamp immediately when the diagnostic runs and fails.
• A default value for the engine oil pressure reading is used.
Conditions for Clearing the Fault Code:
• To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
• The fault code status displayed by the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
• The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
• It is necessary to use the "Reset All Faults" command in the recommended Cummins® electronic service tool or equivalent to clear this fault.
Shop Talk:
The oil pressure sensor shares supply and return wires in the engine harness with other sensors, opens and shorts in the engine harness can cause multiple fault codes to be active. Before troubleshooting Fault Code 141, check for multiple faults.
Possible causes of this fault code include:
-Signal circuit open or shorted to ground in the engine harness or sensor.
• Supply wire open or shorted to ground.
Read More:
SPN 110 - FMI 3 (Fault Code 144)
SPN 100 - FMI 18 (Fault Code 143)
Blog.Teknisi
Engine Oil Rifle Pressure 1 Sensor Circuit - Voltage Below Normal or Shorted to Low Source
 |
| Engine Oil Pressure Sensor Circuit |
CODES:
Fault Code: 141
PID(P), SID(S): P100
SPN: 100
FMI: 4/4
Lamp: Amber
REASON: Low signal voltage or open circuit detected at the engine oil pressure circuit.
EFFECT: None on performance.
Circuit Description:
The engine control module (ECM) provides a 5 volt supply to the engine oil pressure sensor on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The engine oil pressure sensor provides a signal to the ECM on the engine oil pressure sensor signal circuit. This sensor signal voltage changes based on the pressure in the oil rifle. The ECM will detect a low signal voltage at operating conditions when the oil pressure may be slightly lower. The ECM will detect a high signal voltage during high engine speeds or operating conditions when the oil temperature is low.
Component Location:
The engine oil pressure sensor is located in the oil rifle.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the engine oil pressure signal voltage was out of range low.
Action Taken When the Fault Code is Active:
• The ECM illuminates the amber CHECK ENGINE lamp immediately when the diagnostic runs and fails.
• A default value for the engine oil pressure reading is used.
Conditions for Clearing the Fault Code:
• To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
• The fault code status displayed by the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
• The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
• It is necessary to use the "Reset All Faults" command in the recommended Cummins® electronic service tool or equivalent to clear this fault.
Shop Talk:
The oil pressure sensor shares supply and return wires in the engine harness with other sensors, opens and shorts in the engine harness can cause multiple fault codes to be active. Before troubleshooting Fault Code 141, check for multiple faults.
Possible causes of this fault code include:
-Signal circuit open or shorted to ground in the engine harness or sensor.
• Supply wire open or shorted to ground.
Read More:
SPN 110 - FMI 3 (Fault Code 144)
SPN 100 - FMI 18 (Fault Code 143)
Blog.Teknisi
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