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.

Comparing the reductant controller supply with reported vehicle voltage

The reductant control module reports supply voltage above its limit

A reductant quality-module low-supply code includes a wider voltage statement

Reductant Quality Module Performance

The injector B open-load check for cylinder 1

An injector B open-load code with an unresolved channel-to-cylinder mapping

Understanding the cylinder 3 injector B open-circuit category

Open-load evidence for injector B without assuming the source’s channel number

Keeping injector-channel identity separate from a cylinder 5 open-load label

The cylinder 6 injector B open-load test uses an inactive output

A cylinder 7 injector B open-load diagnosis with a separate document channel

Understanding the electrical evidence behind a cylinder 8 injector B open code

Cylinder 9 Injector B Circuit/Open

Cylinder 10 Injector B Circuit/Open

Cylinder 11 Injector B Circuit/Open

Cylinder 12 Injector B Circuit/Open

The injector B low-circuit label uses an internal off-state check

The cylinder 1 injector B high-circuit monitor uses active-stage current

tank heater 1 draws too little current while commanded on

Interpreting injector B circuit low while the channel mapping is unresolved

An injector B high-circuit report whose source channel needs mapping

How the cylinder 3 injector B low-circuit category differs from open load

Interpreting excessive active-stage current for cylinder 3 injector B

A low-circuit injector code whose document channel differs from its cylinder label

High injector current with cylinder 4 and channel 2 names kept separate

Keeping a cylinder 5 injector low-circuit report tied to verified evidence

An active injector-current fault with an unresolved channel identity

The cylinder 6 injector B low-circuit check depends on an inactive stage

The cylinder 6 injector B high-circuit check evaluates current under command

An injector low-circuit diagnosis with cylinder and channel numbering to resolve

High-circuit injector evidence without a guessed cylinder-to-channel conversion

Understanding injector B circuit low when the source uses a different channel number

The injector B high-circuit code whose document channel is numbered 4

Cylinder 9 Injector B Circuit Low

Cylinder 9 Injector B Circuit High

Cylinder 10 Injector B Circuit Low

Cylinder 10 Injector B Circuit High

Cylinder 11 Injector B Circuit Low

Cylinder 11 Injector B Circuit High

Cylinder 12 Injector B Circuit Low

Cylinder 12 Injector B Circuit High

Fuel Control System B Too Lean Off Idle Bank 1

Fuel Control System B Too Rich Off Idle Bank 1

Fuel Control System B Too Lean Off Idle Bank 2

Fuel Control System B Too Rich Off Idle Bank 2

Why bank 1’s lean idle code depends on the port-injection adaptation

Understanding a rich idle adaptation on bank 1’s PFI fuel path

Bank 2’s lean idle adaptation on the port-injection fuel path

A rich idle correction on bank 2’s port-fuel-injection path

Fuel Control System B Too Lean at Higher Load Bank 1

Fuel Control System B Too Rich at Higher Load Bank 1

Fuel Control System B Too Lean at Higher Load Bank 2

Fuel Control System B Too Rich at Higher Load Bank 2

An upstream NOx circuit code includes controller self-check failures

NOx sensor 1 internal current-control stability

NOx sensor 1 reports below its usable concentration range

engine-out NOx raw value exceeds the sensor range

NOx signal validity requires supply and communication checks

NOx sensor 1 heater-control open-circuit diagnosis

NOx heater-control short to ground after dewpoint

NOx sensor 1 heater circuit short toward power

NOx heater-sense open circuit is separate from heater control

NOx heater resistance deviates from its target after several delays

NOx sensor 1 supply falls low while relay voltage remains adequate

post-catalyst NOx sensor supply-voltage supervision

NOx Sensor Supply Voltage Circuit Bank 2 Sensor 1

NOx Sensor Supply Voltage Circuit Bank 2 Sensor 2

Upstream NOx heater performance has electrical and control branches

Tailpipe NOx heater sensing can fail even when some heating occurs

NOx heater-sense connection is shorted to ground

NOx heater-sense circuit has a short-to-power indication

NOx Sensor Heater Sense Circuit Intermittent Bank 1 Sensor 1

NOx Sensor Circuit Bank 2

NOx Sensor Circuit Range/Performance Bank 2

NOx Sensor Circuit Low Bank 2

NOx Sensor Circuit High Bank 2

NOx Sensor Circuit Intermittent Bank 2

NOx Sensor Heater Control Circuit/Open Bank 2

NOx Sensor Heater Control Circuit Low Bank 2

NOx Sensor 1/2 Correlation Bank 1