during vehicle

Solenoid power shorted to ground (more
than 4 A current flow)
Single thermistor above 82.2°C (180°F)

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FC

Title

Description

Common interface fault –Information only to
engine. Indicates that there is a fault in the
Hexagon Agility® system that may cause an
engine performance issue. FC 7281 is slave
to other fault codes; troubleshoot any other
faults first.

7281

Fuel System Control Module –
Condition Exists

7265

Gaseous Fuel High Pressure Shutoff Valve - Data
Valid But Below Normal Operating Range –
Moderately Severe Level

7289

Engine Gaseous Fuel Pressure Regulator Intake
Pressure Circuit –
Voltage Below Normal or Shorted to Low Source

Pressure/temperature transducer pressure
circuit shorted to ground or open for more
than 0.5 seconds

7291

Fuel Storage Compartment 1 Temperature - Data
Valid But Below Normal Operating Range –
Most Severe Level

Average thermistor temperature below
-45°C (-49°F)

7292

Fuel Storage Compartment 1 Temperature 1 Sensor
Circuit –
Voltage Above Normal or Shorted to High Source

Thermistor 1 circuit shorted to high source or
open circuit

7293

Fuel Storage Compartment 1 Temperature 1 Sensor
Circuit –
Voltage Below Normal or Shorted to Low Source

Thermistor 1 circuit shorted to ground

7294

Fuel Storage Compartment 1 Temperature 2 Sensor
Circuit –
Voltage Above Normal or Shorted to High Source

Thermistor 2 circuit shorted to high source or
open circuit

7295

Fuel Storage Compartment 1 Temperature 2 Sensor
Circuit –
Voltage Below Normal or Shorted to Low Source

Thermistor 2 circuit shorted to ground

7296

Engine Gaseous Fuel Pressure Regulator Intake
Pressure –
Data Valid But Below Normal Operating Range –
Most Severe Level

Pressure/temperature transducer pressure
below 250 psi (1.72 MPa) for more than 2.5
seconds

7298

Engine Gaseous Fuel Pressure Regulator Intake
Pressure Circuit –
Voltage Above Normal or Shorted to High Source

Pressure/temperature transducer pressure
circuit shorted to high source for more than
0.5 seconds

7299

Engine Gaseous Fuel Temperature Regulator Intake
Temperature – Data Valid But Above Normal
Operating Range –
Moderately Severe Level

Pressure/temperature transducer
temperature above 95°C (203°F) for more
than 2.5 seconds

7311

Engine Gaseous Fuel Temperature Regulator Intake
Temperature Sensor Circuit –
Voltage Above Normal or Shorted to High Source

Pressure/temperature transducer
temperature circuit shorted to high source
for more than 0.5 seconds

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12V Supply solenoid valve: Resistance is
below 5 ohms for more than 0.4 seconds
24V Supply solenoid valve: Resistance is
below 15 ohms for more than 0.4 seconds

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3.2. Fault Code Diagnostic Procedures

TABLE 3–1 lists all Blue iQ fault code procedures by Fault Code number(s) and the associated Hexagon Agility®

document control numbers.

TABLE 3–1. List of Blue iQ Fault Code Procedures by Document Control Number

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Fault Code(s)
Diagnostic

Document
Control Number

5572

DSM.0013

6845

DSM.0014

6849

DSM.0015

6857

DSM.0016

6858

DSM.0017

6947

DSM.0018

6955

DSM.0019

6958

DSM.0020

6963

DSM.0021

7194

DSM.0022

7195

DSM.0023

7264

DSM.0024

7265

DSM.0025

7281

DSM.0026

7289

DSM.0027

7291

DSM.0028

7292 and 7293

DSM.0029

7294 and 7295

DSM.0030

7296

DSM.0031

7298

DSM.0032

7299

DSM.0033

7311

DSM.0034

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Glossary of Terms
Term/Abbreviation
AUX

Definition
Hexagon Agility® term applied to any auxiliary fuel
receptacle configuration not located on the driver side
(left side) of the vehicle. Examples include the
following: passenger side (right side) fuel receptacles;
remote fuel fill receptacles mounted on the front
bumper, body side, or rear of body.

Blue iQ gauge

driver configurable in cab Blue iQ fuel system display

CAN

acronym for Controller Area Network (see)

controller area network

serial bus communication system for connecting
vehicle components and sensors for on-board
diagnostics

CNG

compressed natural gas

DAP

Drive Away Protection – safety feature preventing
engine start if fuel receptacle dust caps are not in place
or fuel filler door is not closed

datalink connector

cable connecting a PC to the vehicle OBD-II port

Derate

reduction in engine power in response to a low fuel
condition

DGE

diesel gallon equivalent – measure of natural gas
capacity as compared to diesel volume

Diagnostic Trouble Code

standard codes used to identify abnormal operating
conditions in an electronic circuit or by an electronic
component as detected by the Fuel System Control
Module (FSCM)

DTC

Diagnostic Trouble Code (see); refer also to fault code

DTE

distance to empty

Eco Mode

fleet configurable Blue iQ operating parameter to
maximize fuel system efficiency; Eco Mode is enabled
by default, but a driver may disable

Engine Gaseous Fuel Pressure
Regulator Intake Pressure Sensor

Cummins® INSITE™ term for pressure/temperature
transducer pressure sensor

Engine Gaseous Fuel Temperature
Regulator Intake Temperature Sensor

Cummins® INSITE™ term for pressure/temperature
transducer temperature sensor

English units

Blue iQ gauge display option for units of measure
utilizing miles for distance, psi for pressure, volume in
gallons, and temperature in Fahrenheit. Also referred to
as U.S. customary units. Compare: “metric units”

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Term/Abbreviation

Definition

Failure Mode Identifier

A Failure Mode Identifier may indicate that an abnormal
operating condition has been detected. The failure
mode of the Diagnostic Trouble Code is determined by
evaluating the electronic signal from the suspect circuit.
FMIs are divided into two types: 1) codes indicating a
problem with an electronic circuit or an electronic
component has been detected, 2) codes indicating a
system event has been detected.

fault code

codes relating to improper fuel system operation stored
by the fuel system control module (FSCM)

FC

abbreviation for fault code (see); refer also to
Diagnostic Trouble Code (DTC)

FMI

acronym for Failure Mode Identifier (see)

FMM

fuel management module – comprises fuel fill, flow,
filtration, pressure regulation, and control components
and defueling components

FOD

foreign object debris

FSCM

fuel system control module – electronic FMM
component which monitors and manages fuel system
function

Fuel Storage Compartment Temperature
Sensor

Cummins® INSITE™ term for thermistor (see)

fuel system control module electronic

FMM component which monitors and manages Blue iQ
fuel system function

Fuel Tank Receptacle Cover

Cummins® INSITE™ term for fuel receptacle cap, fuel
receptacle cover, or, or FMM fuel door. Refer to Drive
Away Protection (DAP).

Gaseous Fuel High Pressure Shutoff
Valve

Cummins® INSITE™ term for supply solenoid valve
(SSV)

HP

high-pressure

INSITE™

Cummins® proprietary diagnostic tool

kPa

kilopascal – metric unit of pressure

J1939

SAE standard for CAN communication and diagnostics
among heavy-duty vehicle components

LP

low-pressure

Low Fuel

fleet-adjustable Blue iQ bottom fuel threshold to trigger
a “Low Fuel” message

Manifilter

machined Hexagon Agility® FMM component which
serves to filter impurities from fuel and—on some
systems—contains the fuel system pressure/
temperature transducer

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Term/Abbreviation

Definition

metric units

Blue iQ gauge display option for International System
units of measure utilizing kilometers for distance, kPa
for pressure, volume in liters, and temperature in
Celsius. Compare: “English units”

MPa

megapascal – metric unit of pressure

Over Temp Warning

Blue iQ gauge message indicating fuel storage
temperature has risen above normal operating levels

pressure/temperature transducer

component consisting of fuel pressure and temperature
sensors mounted in the pressure regulator (see) or
Manifilter (see)

pressure regulator

FMM flow component which reduces fuel system
pressure from cylinder storage pressure (approx. 3600
psi / 24.8 MPa) to a lower pressure usable for the
engine

psi

pounds per square inch – English unit of pressure

SPN

acronym for Suspect Parameter Number (see)

SSV

acronym for supply solenoid valve (see)

supply solenoid valve

electrical coil controlled valve in the FMM which opens
at ignition on to permit fuel flow to the engine or closes
to stop fuel flow when ignition is off

Suspect Parameter Number

unique value assigned to a particular vehicle or fuel
system fault code

thermistor

Blue iQ fuel system temperature sensor which relies
upon electrical resistance to measure temperature in
the fuel system enclosure(s)

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Contact information
Hexagon Agility® Customer Care and Technical Services
Fuel system warranty or non-warranty product support may be obtained by calling or emailing Hexagon Agility® Customer
Care and Technical Services (CCTS).
Please provide your name, phone number, email address, and complete vehicle information: VIN, year, make, model,
mileage, unit number vehicle owner, and current vehicle location. A service advisor will contact you to arrange vehicle
repair or ship a part.

+1 855 500 2445

(toll-free, U.S. and Canada)

+1 949 267 7745

Parts Orders

Support

[email protected]

[email protected]

Proprietary Statement

The information provided within this document is proprietary and confidential. All prior versions, including updates and revisions forwarded separately, are
proprietary. The information provided by Hexagon Agility® to its customers and clients is solely for the use of those customers and clients. No portion of
this publication may be reproduced or distributed without express written consent of Hexagon Agility®. Hexagon Agility® reserves the right to utilize the
intellectual property contained within this publication as content for any other publication produced by Hexagon Agility®.

Trademark Notice

Hexagon® is a registered trademark of Hexagon Technology AS. Agility® is a registered trademark of Agility Fuel Solutions LLC. Trademarks of other
manufacturers are the property of their respective companies.

Hexagon Agility® 3335 Susan Street, Suite 100 Costa Mesa, CA 92626 USA

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www.hexagonagility.com

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