Conditions Which Generate This Code: This condition occurs when there is an open in the circuit for the “2-wire float sensor”. The “Coolant Level Sensor” parameter must be programmed to “2-wire Float Sensor” before this diagnostic code can occur. If the “Coolant Level Sensor” parameter is programmed to “2-pin switch “, or “4-pin” this diagnostic code is disabled. The coolant level sensor is installed by the vehicle’s Original Equipment Manufacturer (OEM). This sensor is an optional sensor for “Engine Monitoring”. Engine monitoring is a programmable feature of the Caterpillar Engine Control Module (ECM). The sensor is selectable through a customer...

Conditions Which Generate This Code: This condition occurs when there is a short in the circuit for the “2-wire float sensor”. The “Coolant Level Sensor” parameter must be programmed to “2-wire float sensor” before this diagnostic code can occur. If the “Coolant Level Sensor” parameter is programmed to “2-pin switch”, or “4-pin” this diagnostic code is disabled. The coolant level sensor is installed by the vehicle’s Original Equipment Manufacturer (OEM). This sensor is an optional sensor for “Engine Monitoring”. Engine monitoring is a programmable feature of the Caterpillar Engine Control Module (ECM). The sensor is selectable through a customer programmable...

The Engine Control Module (ECM) detects the following conditions: •For C7 engines that are not in emergency vehicles, the engine coolant temperature is at least 111° C (232° F) for more than four seconds.•For C7 emergency vehicles and for C9 vehicles, the engine coolant temperature is at least 116° C (241° F) for more than four seconds.•For C9 emergency vehicles with automatic transmissions, the engine coolant temperature is at least 121° C (250° F) for more than four seconds.•The engine has been running more than 30 seconds. Note: This diagnostic code represents a critical event. This diagnostic code does not...

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/Harness2) Fuel level sensor failure3) WIring between fuel level sensor & ECM CAT 3126E Fault Code: 22-13 PID: Flash Code 42 SPN: 637 FMI: 13 Engine Speed Signal Calibration Not Performed CAT 3126E Fault Code: 22-11 PID: Flash Code 42 SPN: 637...

This diagnostic code is used only by GMT-560 applications. The ECM detects the following: •The Secondary Fuel Level signal voltage is below 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/Harness2) Fuel level sensor failure3) WIring between fuel level sensor & ECM CAT 3126E Fault Code: 128-03 PID: Flash Code 44 SPN: FMI: Secondary Fuel Level voltage high CAT 3126E Fault Code: 22-13 PID:...