MANUFACTURER REFERENCE

Generic OBD-II code references — Page 50.

Read the source definition and confirm the exact vehicle, reporting module and diagnostic procedure.

Generic OBD-II

P2211

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.

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

NOx Sensor 1/2 Correlation Bank 2

Why low DEF line-heater current must be judged with a positive command

reductant line-heater current exceeds its operating limit

Identifying inadequate current in the second DEF tank heater

second tank-heater channel draws excessive current

NOx Sensor Heater Control Circuit High Bank 2

NOx Sensor Heater Sense Circuit Bank 2

NOx Sensor Heater Sense Circuit Range/Performance Bank 2

NOx Sensor Heater Sense Circuit Low Bank 2

NOx Sensor Heater Sense Circuit High Bank 2

NOx Sensor Heater Sense Circuit Intermittent Bank 2

Internal barometric sensor communication or memory fault

three-sensor comparison isolates barometric-pressure disagreement

LIN-reported barometric pressure is below the permitted range

The LIN barometric-pressure value exceeds its upper limit

Barometric Pressure Sensor B Circuit

Separating physical pressure range faults from sensor cross-check failures

Why barometric sensor B circuit-low can be a digital count limit

Understanding a high digital reading from barometric sensor B

Barometric-pressure sensor B changes too erratically

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