These are code references, not a list of confirmed faults on every vehicle. Read the source and applicability notes, then match the exact vehicle, year, engine and scan report.

low tank-temperature signal can represent an electrically hot reading

Why a high DEF temperature-sensor voltage represents a cold extreme

Recognizing an erratic DEF tank temperature signal

Reductant System Performance Bank 2

Reductant Injection Air Pump Control Circuit Low

Reductant Injection Air Pump Control Circuit High

Reductant/Regeneration Supply Control Circuit/Open

Reductant/Regeneration Supply Control Circuit Low

Reductant/Regeneration Supply Control Circuit High

secondary fuel-level inactivity depends on tank state and distance

Fuel level sensor B noise is detected through repeated large changes

A low fuel-level sensor B circuit is not a direct empty-tank measurement

A high fuel-level sensor B circuit should not be read as a full tank

Fuel Level Sensor B Circuit Intermittent

Reductant Quality Sensor Circuit

reductant quality data remains unavailable when it should be ready

quality-sensor circuit low combines measurement and piezo faults

A DEF quality reading above range is not a direct voltage measurement

Intake Manifold Tuning (IMT) Valve Stuck Open Bank 2

Intake Manifold Tuning (IMT) Valve Stuck Closed Bank 2

The tuning-valve open/closed label must be resolved before a jam diagnosis

A tuning-valve jam result needs the source’s endpoint conflict kept visible

Throttle Actuator Control System - Ice Blockage Bank 1

Idle airflow adaptation is compared with a calibration-specific allowance

High-load airflow correlation can fail its learned value or fail to stabilize

Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Bank 1

A tuning-valve performance result can concern SENT data range

The tuning position low-range test uses a bounded raw-voltage window

A high tuning-position code has an impossible printed voltage condition

Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Intermittent Bank 1

Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Bank 2

Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Range/Performance Bank 2

Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Low Bank 2

Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit High Bank 2

Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Intermittent Bank 2

Ram reductant quality: compare fluid and scan-tool evidence

EGT sensor 1 fails to show the expected post-soak rise

EGT sensor 1 changes faster than the monitor permits

Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 1

Exhaust Gas Temperature Sensor Circuit Intermittent Bank 2 Sensor 1

EGT sensor 2 has insufficient warming response after soak

rapid raw-temperature changes from EGT sensor 2

Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 2

Exhaust Gas Temperature Sensor Circuit Intermittent Bank 2 Sensor 2

bank-one intake actuator control is low while its high-side driver is on

cam-actuator high input must be read with driver architecture

Why the DEF pump may stop before an open circuit is identified

reductant pump speed fails to follow its command

Separating a DEF pump ground-short report from a pressure fault

pump short-to-power is isolated after the pump is stopped

Reductant valve stuck closed is evaluated over injection strokes

Reductant Injection Valve Stuck Closed Bank 2 Unit 1

Exhaust camshaft actuator circuit low during powered operation

Exhaust camshaft actuator circuit high and the driver-off check

The bank 2 intake cam actuator’s low-circuit check

A bank 2 intake cam driver that remains high when commanded on

Recognizing the bank 2 exhaust cam actuator’s low electrical fault

When the bank 2 exhaust cam actuator driver fails its on-state check

Post-catalyst fuel correction reaches the lean limit

Post-catalyst fuel correction reaches the rich limit

Post-catalyst lean wording and the bank 2 upstream-sensor offset check

Bank 2 rich post-catalyst trim as an upstream lambda-offset diagnosis

Reductant Injection Air Pressure Sensor B Circuit

Reductant Injection Air Pressure Sensor B Circuit Range/Performance

Reductant Injection Air Pressure Sensor B Circuit Low

Reductant Injection Air Pressure Sensor B Circuit High

Reductant Injection Air Pressure Sensor A/B Correlation

Ram DEF-tank heater performance warning and DCU software

reductant purge-driver feedback is wrong while commanded off

reductant pressure-reduction performance needs its own test state

low purge-valve feedback is evaluated with the driver off

purge-driver feedback remains high during the on command

Reductant Purge Control Valve A Stuck Open

Reductant Purge Control Valve A Stuck Closed

Reductant Injection Air Pressure Control Valve Circuit/Open

Reductant Injection Air Pressure Control Valve Performance

Reductant Injection Air Pressure Control Valve Circuit Low

Reductant Injection Air Pressure Control Valve Circuit High

Reductant Injection Air Pressure Control Valve Stuck Open

Reductant Injection Air Pressure Control Valve Stuck Closed