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CUMMINS FAULT CODE 265

ADVERTICEMENTS

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FAULT CODE 265

Engine Fuel Temperature Sensor 1 Circuit - Voltage Below Normal or Shorted to Low Source

Overview


CODE

REASON

EFFECT

Fault Code: 265

Engine Fuel Temperature Sensor 1 Circuit - Voltage Below Normal or

Engine control module (ECM) will set a default

PID:

Shorted to Low Source. Less than 0.21 volt detected at the fuel

value for fuel temperature. No other action

SPN: 174

temperature signal pin of the engine harness.

taken by ECM.

FMI: 4



LAMP: Amber



SRT: QU-065



Engine Fuel Temperature Sensor 1 Circuit - Power Generation

Engines


Engine Fuel Temperature Sensor 1 Circuit - Marine En


Circuit Description


The engine fuel temperature sensor 1 is used by the ECM to monitor the temperature of the fuel. The fuel temperature is used by the ECM for the engine protection system, timing, and fueling control. The ECM monitors the voltage the sensor signal pin. The ECM expects to see the voltage vary between 0.5 and

4.5 volt. If the voltage is below 0.21 volt, then the ECM will log Fault Code 265. Voltage below 0.21 volt on the sensor SIGNAL pin can be caused by shorts to

ground on the SUPPLY or RETURN wires or an internally grounded, damaged sensor.


Component Location


The engine fuel temperature sensor 1 is located on the left side of the engine, on the fuel filter head. Use the following procedure for a detailed component location view. Refer to Procedure 100-002 in Section E.


Shop Talk


All temperature sensors:


  • The resistance of the sensor varies with the temperature. The reading that you observe could possibly compare to the following table if the sensor is functioning properly.


Temperature (°C)

Temperature [°F]

Resistance (ohms)

0

32

30k to 36k

25

77

9k to 11k

50

122

3k to 4k

75

167

1350 to 1500

100

212

600 to 675

Refer to Troubleshooting Fault Code t05-265.


Last Modified: 29-Nov-2012

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