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.

The transmission receives a pedal-sensor fault message

Data Bus Powertrain Missing Message From Instrument Panel ECU

Data Bus Powertrain Missing Message From Steering Angle Sensor

Torque Converter Clutch Circuit

Data Bus Powertrain Missing Message From ADR Control Module

Data Bus Powertrain Missing Message From Central Electronics

Transmission Transfer Case System Concern Servicing Required

Data Bus Powertrain Missing Messages

Transmission Transfer Case Contact Plate General Circuit Failure

Transmission Fluid Life

Excessive converter-clutch slip in the 3T40 monitor

TCC Stator Temp. Switch Circuit Low

TCC Stator Temp. Switch Circuit High

Four-wheel-drive low indication disagrees with ratio

4WD Low Switch Circuit Malfunction

Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Failure

Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Short To Battery

Engine Coolant Level Switch Circuit Failure GEM

Engine Coolant Level Switch Circuit Short to Ground

Engine Coolant Level Switch Circuit Failure GEM

TCC Enable/Shift Light Circuit

Engine Coolant Level Lamp Circuit Short to Ground

Shift Timing Solenoid

TCC release switch says released while engagement evidence agrees

ECM Data Input Circuit

Throttle Position Sensor PWM Signal Low

Transmission Transfer Case Contact Plate Ground Return Open Circuit

Throttle Position Sensor PWM Signal High

Engine Torque Signal Low Voltage

Engine Torque Signal High Voltage

TCM To ECM Torque Reduction Circuit

TCM To ECM Torque Reduction Circuit Malfunction

the Wrangler park/neutral input disagrees with the selector

P/N Position Transaxle Range Switch Circuit Fault

Ford output-shaft-speed signal is irregular or interrupted

Turbine Speed Sensor Circuit Intermittent

Turbine Shaft Speed (TSS) Circuit Intermittent Malfunction

Torque Converter Clutch Circuit Intermittent

Kickdown Solenoid Relay Control Circuit

Kickdown Solenoid Circuit Low Voltage

Kickdown Solenoid Circuit High Voltage

Early Cummins NOx-efficiency fault with soot-fouled oxygen sensors

NOx Adsorber Efficiency Below Threshold Bank 2

DPF efficiency is judged from filtered soot-sensor evidence

Particulate Filter Efficiency Below Threshold Bank 2

Bank 1 intake runners do not match the commanded closed state

A bank 2 stuck-open runner result needs its own command and feedback

swirl flaps fail to return after actuator shutdown

Bank 2 intake runners remain closed when the monitored command requires otherwise

swirl-motor open-circuit detection occurs with the driver off

swirl-motor circuit low is identified by H-bridge overcurrent

key-off swirl-flap learning and response checks

Audi's runner-overtravel monitor uses a signal-voltage boundary

two downstream DPF overtemperature thresholds

Particulate Filter Over Temperature Bank 2

close-coupled oxidation-catalyst overtemperature evidence

Catalyst System Over Temperature Bank 2

swirl-motor high circuit uses hardware short-to-power information

Bank 2 intake runner control-circuit status is separate from plate movement

Intake Manifold Runner Control Circuit Low Bank 2

Intake Manifold Runner Control Circuit High Bank 2

the CAED runner-position circuit has a high-signal criterion

Bank 1 runner position can exceed its expected operating range

low SENT swirl-position value with communication still valid

high swirl-position signal is separate from a motor high fault

Intake Manifold Runner Position Sensor/Switch Circuit Intermittent Bank 1

Intake Manifold Runner Position Sensor/Switch Circuit Bank 2

Reductant Injection Valve Circuit Range/Performance Bank 2 Unit 1

swirl-motor supply is low despite a valid relay supply

Intake Manifold Runner Control Actuator Supply Voltage Low Bank 2

Intake Manifold Runner Control Actuator Internal Performance Bank 1

Intake Manifold Runner Control Actuator Internal Performance Bank 2

Reductant Pump A Stuck On

Bank 2 runner over-travel requires valid position feedback

A low bank 2 runner position signal is not proof the runners are closed

Bank 2 runner feedback is electrically high before position can be trusted

Intake Manifold Runner Position Sensor/Switch Circuit Intermittent Bank 2

the CAED EVAP temperature circuit is evaluated in a defined voltage band

EVAP temperature performance includes communication and module checks

low EVAP temperature-circuit voltage is not a cold-vapor diagnosis