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.

Volkswagen sensor-three stuck-rich response check

O2 Sensor Signal Biased/Stuck Lean Bank 2 Sensor 3

O2 Sensor Signal Biased/Stuck Rich Bank 2 Sensor 3

O2 Sensor Signals Swapped Bank 1 Sensor 3/Bank 2 Sensor 3

intake leakage includes the PCV system and runner-position evidence

Barometric Pressure Sensor C Circuit

the documented BARO C code tests turbo-inlet pressure agreement

BARO sensor C reports pressure below its allowed range

BARO sensor C reports pressure above its calibrated ceiling

BARO C has excessive accumulated signal movement

Air Flow Restriction/Air Leak Between Air Filter and MAF Bank 2

Ram air-cleaner-to-MAF fault and a two-trip monitor update

Ram intake-leak indication and verifying a successful flash

An inferred intake leak needs a nearly closed throttle and healthy inputs

Injector Control Pressure Sensor Circuit

Ford 6.0L ICP feedback exceeds commanded pressure

Ford 6.0L ICP sensor voltage is below range

Ford 6.0L ICP sensor voltage exceeds its range

Injector Control Pressure Sensor Circuit Intermittent

Ford 6.0L running injection-control pressure is too high

Ford 6.0L ICP remains too high with the engine off

rail pressure remains low after metering control reaches its limit

rail pressure stays low despite maximum regulator command

High-pressure fuel delivery falls below the requested target

Fuel rail pressure stays above the requested target

A low learning-limit fault is about fuel-pressure adaptation

An upper adaptation boundary is not the same as rail overpressure

Ford 6.0L actual ICP falls below commanded pressure

Cranking rail pressure remains below the starting monitor boundary

Injector Control Pressure Erratic

regulator-controlled rail pressure exceeds a speed-dependent ceiling

regulator 2 open circuit is diagnosed with the driver off

regulator 2 low circuit is an off-state ground-short test

fuel pressure regulator 2 driver short-to-power detection

oxygen concentration drift during stable deceleration

An out-of-range wideband signal with operating conditions that need careful reading

Journey pedal-signal incompatibility and the 2.4 L calibration row

Fuel Pressure Regulator B Exceeded Control Limits - Pressure Too Low

Fuel Pressure Regulator B Exceeded Control Limits - Pressure Too High

Fuel Pressure Regulator B Exceeded Learning Limits - Too Low

Fuel Pressure Regulator B Exceeded Learning Limits - Too High

Tailpipe NOx processor and circuit faults share this code in Ford’s summary

post-catalyst NOx sensor current-control instability

NOx sensor 2 reports below its allowed concentration range

NOx sensor 2 exceeds its upper reporting limit

NOx Sensor Circuit Intermittent Bank 1 Sensor 2

open heater-control circuit reported by NOx sensor 2

NOx sensor 2 heater-control short to ground

NOx sensor 2 heater-control short to supply

open NOx sensor 2 heater-sense circuit

NOx sensor 2 heater resistance fails its performance check

NOx sensor 2 heater-sense short to ground

NOx sensor 2 heater-sense short to power

NOx Sensor Heater Sense Circuit Intermittent Bank 1 Sensor 2

O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 2

O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 2

O2 Sensor Positive Current Control Circuit High Bank 1 Sensor 2

O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 2

O2 Sensor Reference Voltage Performance Bank 1 Sensor 2

O2 Sensor Reference Voltage Circuit Low Bank 1 Sensor 2

O2 Sensor Reference Voltage Circuit High Bank 1 Sensor 2

O2 Sensor Negative Current Control Circuit/Open Bank 1 Sensor 2

O2 Sensor Negative Current Control Circuit Low Bank 1 Sensor 2

O2 Sensor Negative Current Control Circuit High Bank 1 Sensor 2

O2 Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 2

NOx sensor 2 oxygen signal below its reporting floor

NOx sensor 2 oxygen signal above its reporting ceiling

O2 Sensor Positive Current Control Circuit/Open Bank 2 Sensor 2

O2 Sensor Positive Current Control Circuit Low Bank 2 Sensor 2

O2 Sensor Positive Current Control Circuit High Bank 2 Sensor 2

O2 Sensor Reference Voltage Circuit/Open Bank 2 Sensor 2

O2 Sensor Reference Voltage Performance Bank 2 Sensor 2

O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 2

O2 Sensor Reference Voltage Circuit High Bank 2 Sensor 2

O2 Sensor Negative Current Control Circuit/Open Bank 2 Sensor 2

O2 Sensor Negative Current Control Circuit Low Bank 2 Sensor 2

O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 2

O2 Sensor Pumping Current Trim Circuit/Open Bank 2 Sensor 2

O2 Sensor Pumping Current Trim Circuit Low Bank 2 Sensor 2

O2 Sensor Pumping Current Trim Circuit High Bank 2 Sensor 2