P CODE FAMILY

Powertrain code references — Page 69.

Engine, transmission and powertrain diagnostic references. Exact vehicle and module context still matters.

Generic OBD-II

P222F

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.

Barometric Pressure Sensor A/B Correlation

Barometric pressure fluctuates too much over consecutive samples

heater influence is detected through upstream sensor current variation

Detecting heater interference in the bank 1 rear oxygen-sensor signal

O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 3

bank-two heater coupling is evaluated under controlled sensor conditions

A bank 2 rear oxygen-sensor fault linked to heater switching

O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 2 Sensor 3

Wide-range oxygen sensor pump-current circuit is diagnosed open

the pump-circuit check uses missing lean response during fuel shutoff

pump-circuit diagnosis follows a qualified control-factor change

Reductant Heater E Control Circuit

Reductant Heater F Control Circuit

Oxygen pump current is implausible during fuel cutoff

O2 Sensor Pumping Current Range/Performance Bank 2

Oxygen reference-cell resistance implies an out-of-range temperature

O2 Sensor Reference Resistance Out Of Range Bank 2

A positive-current circuit code with more than one wideband-sensor path

O2 Sensor Positive Current Control Circuit Low Bank 2 Sensor 1

O2 Sensor Positive Current Control Circuit High Bank 2 Sensor 1

Bank 1 front oxygen reference-voltage circuit is diagnosed open

O2 Sensor Reference Voltage Performance Bank 1 Sensor 1

O2 Sensor Reference Voltage Circuit Low Bank 1 Sensor 1

O2 Sensor Reference Voltage Circuit High Bank 1 Sensor 1

The bank 2 upstream sensor reference-line continuity diagnosis

O2 Sensor Reference Voltage Performance Bank 2 Sensor 1

O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1

NOx Sensor Heater Resistance Bank 1 Sensor 1

NOx Sensor Heater Resistance Bank 1 Sensor 2

Alternative Fuel Tank Shutoff Valve A Control Circuit/Open

Alternative Fuel Tank Shutoff Valve A Control Circuit Performance/Stuck Off

Alternative Fuel Tank Shutoff Valve A Control Circuit Low

Alternative Fuel Tank Shutoff Valve A Control Circuit High

O2 Sensor Reference Voltage Circuit High Bank 2 Sensor 1

Front oxygen reference-ground circuit fails its open-circuit check

Diesel air-fuel sensor negative-current circuit low

Air-fuel sensor negative-current circuit high input

The bank 2 negative-current circuit check changes with sensor operating state

O2 Sensor Negative Current Control Circuit Low Bank 2 Sensor 1

O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1

secondary-air relay low circuit can include an open connection

secondary-air relay high circuit is separate from pump-flow performance

AIR System Control B Circuit Low

Ford NOx sensor 1 calibration memory fails its CRC check

Ford NOx sensor 2 calibration-memory integrity fault

NOx Sensor Performance - Signal Biased/Stuck High Bank 1 Sensor 1

NOx Sensor Performance - Signal Biased/Stuck Low Bank 1 Sensor 1

NOx Sensor Performance - Signal Biased/Stuck High Bank 1 Sensor 2

NOx Sensor Performance - Signal Biased/Stuck Low Bank 1 Sensor 2

AIR System Control B Circuit High

Turbo bypass valve fails the coast-down pulsation check

Ford 6.0L boost pressure is absent under qualifying demand

Boost-system performance uses an accumulated underboost deviation

Water in Fuel Sensor A Circuit

Water in Fuel Sensor A Circuit Range/Performance

Water in Fuel Sensor A Circuit Low

Water in Fuel Sensor A Circuit High

Water in Fuel Sensor A Circuit Intermittent

Fuel conductivity is outside the sensor’s normal fuel range

Water in Fuel Lamp Control Circuit

Turbocharger/Supercharger A Boost Pressure Too High - Mechanical

Turbo response monitoring needs the correct engine-specific test

low DPF flow resistance can also implicate pressure-sensing pipes

Bank2 GPF deterioration monitoring depends on pressure normalization

Turbocharger Boost Control B Slow Response

Rear oxygen sensor fails to respond to commanded enrichment

Rear oxygen sensor remains rich during the fuel-cutoff test

A lean-biased rear-sensor code with an unresolved bank label in the source

Interpreting a rear-sensor rich-bias check when the table wording conflicts

Volkswagen sensor-three signal stuck lean

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