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THE CODE DIRECTORY

Diagnostic code references — Page 77.

Browse canonical reference entries. Each definition keeps its own source and vehicle-applicability limits.

11,786 code references

Generic OBD-II
P22B4

O2 Sensor Negative Current Control Circuit High Bank 1 Sensor 2

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Generic OBD-II
P22B5

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

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Generic OBD-II
P22B6

NOx sensor 2 oxygen signal below its reporting floor

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Generic OBD-II
P22B7

NOx sensor 2 oxygen signal above its reporting ceiling

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Generic OBD-II
P22B8

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

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Generic OBD-II
P22B9

O2 Sensor Positive Current Control Circuit Low Bank 2 Sensor 2

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Generic OBD-II
P22BA

O2 Sensor Positive Current Control Circuit High Bank 2 Sensor 2

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Generic OBD-II
P22BB

O2 Sensor Reference Voltage Circuit/Open Bank 2 Sensor 2

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Generic OBD-II
P22BC

O2 Sensor Reference Voltage Performance Bank 2 Sensor 2

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Generic OBD-II
P22BD

O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 2

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Generic OBD-II
P22BE

O2 Sensor Reference Voltage Circuit High Bank 2 Sensor 2

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Generic OBD-II
P22BF

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

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Generic OBD-II
P22C0

O2 Sensor Negative Current Control Circuit Low Bank 2 Sensor 2

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Generic OBD-II
P22C1

O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 2

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Generic OBD-II
P22C2

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

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Generic OBD-II
P22C3

O2 Sensor Pumping Current Trim Circuit Low Bank 2 Sensor 2

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Generic OBD-II
P22C4

O2 Sensor Pumping Current Trim Circuit High Bank 2 Sensor 2

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Generic OBD-II
P22C5

Turbocharger Compressor Outlet Valve Control Circuit/Open

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Generic OBD-II
P22C6

Turbocharger Compressor Outlet Valve Control Circuit Low

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Generic OBD-II
P22C7

Turbocharger Compressor Outlet Valve Control Circuit High

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Generic OBD-II
P22C8

Turbocharger Compressor Outlet Valve Stuck Open

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Generic OBD-II
P22C9

Turbocharger Compressor Outlet Valve Stuck Closed

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Generic OBD-II
P22CA

Turbocharger Compressor Outlet Switching Valve Control Circuit/Open

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Generic OBD-II
P22CB

Turbocharger Compressor Outlet Switching Valve Control Circuit Low

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Generic OBD-II
P22CC

Turbocharger Compressor Outlet Switching Valve Control Circuit High

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Generic OBD-II
P22CD

Turbocharger Compressor Outlet Switching Valve Stuck Open

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Generic OBD-II
P22CE

Turbocharger Compressor Outlet Switching Valve Stuck Closed

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Generic OBD-II
P22CF

Turbocharger Turbine Inlet Valve Control Circuit/Open

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Generic OBD-II
P22D0

Turbocharger Turbine Inlet Valve Control Circuit Low

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Generic OBD-II
P22D1

Turbocharger Turbine Inlet Valve Control Circuit High

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Generic OBD-II
P22D2

Turbocharger Turbine Inlet Valve Stuck Open

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Generic OBD-II
P22D3

Cherokee hybrid turbine-inlet code that can be falsely stored

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Generic OBD-II
P22D4

Turbocharger Turbine Inlet Valve Position Sensor Circuit

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Generic OBD-II
P22D5

Turbocharger Turbine Inlet Valve Position Sensor Circuit Range/Performance

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Generic OBD-II
P22D6

Turbocharger Turbine Inlet Valve Position Sensor Circuit Low

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Generic OBD-II
P22D7

Turbocharger Turbine Inlet Valve Position Sensor Circuit High

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Generic OBD-II
P22D8

Turbocharger Turbine Inlet Valve Position Sensor Circuit Intermittent/Erratic

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Generic OBD-II
P22D9

Cylinder 1 Alternative Fuel Injector Control Circuit/Open

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Generic OBD-II
P22DA

Cylinder 1 Alternative Fuel Injector Control Circuit Low

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Generic OBD-II
P22DB

Cylinder 1 Alternative Fuel Injector Control Circuit High

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Generic OBD-II
P22DC

Cylinder 1 Alternative Fuel Injector Control Circuit Range/Performance

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Generic OBD-II
P22DD

Cylinder 2 Alternative Fuel Injector Control Circuit/Open

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Generic OBD-II
P22DE

Cylinder 2 Alternative Fuel Injector Control Circuit Low

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Generic OBD-II
P22DF

Cylinder 2 Alternative Fuel Injector Control Circuit High

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Generic OBD-II
P22E0

Cylinder 2 Alternative Fuel Injector Control Circuit Range/Performance

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Generic OBD-II
P22E1

Cylinder 3 Alternative Fuel Injector Control Circuit/Open

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Generic OBD-II
P22E2

Cylinder 3 Alternative Fuel Injector Control Circuit Low

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Generic OBD-II
P22E3

Cylinder 3 Alternative Fuel Injector Control Circuit High

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Generic OBD-II
P22E4

Cylinder 3 Alternative Fuel Injector Control Circuit Range/Performance

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Generic OBD-II
P22E5

Cylinder 4 Alternative Fuel Injector Control Circuit/Open

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Generic OBD-II
P22E6

Cylinder 4 Alternative Fuel Injector Control Circuit Low

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Generic OBD-II
P22E7

Cylinder 4 Alternative Fuel Injector Control Circuit High

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Generic OBD-II
P22E8

Cylinder 4 Alternative Fuel Injector Control Circuit Range/Performance

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Generic OBD-II
P22E9

Cylinder 5 Alternative Fuel Injector Control Circuit/Open

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Generic OBD-II
P22EA

Cylinder 5 Alternative Fuel Injector Control Circuit Low

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Generic OBD-II
P22EB

Cylinder 5 Alternative Fuel Injector Control Circuit High

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Generic OBD-II
P22EC

Cylinder 5 Alternative Fuel Injector Control Circuit Range/Performance

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Generic OBD-II
P22ED

Cylinder 6 Alternative Fuel Injector Control Circuit/Open

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Generic OBD-II
P22EE

Cylinder 6 Alternative Fuel Injector Control Circuit Low

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Generic OBD-II
P22EF

Cylinder 6 Alternative Fuel Injector Control Circuit High

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Generic OBD-II
P22F0

Cylinder 6 Alternative Fuel Injector Control Circuit Range/Performance

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Generic OBD-II
P22F1

Cylinder 7 Alternative Fuel Injector Control Circuit/Open

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Generic OBD-II
P22F2

Cylinder 7 Alternative Fuel Injector Control Circuit Low

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Generic OBD-II
P22F3

Cylinder 7 Alternative Fuel Injector Control Circuit High

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Generic OBD-II
P22F4

Cylinder 7 Alternative Fuel Injector Control Circuit Range/Performance

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Generic OBD-II
P22F5

Cylinder 8 Alternative Fuel Injector Control Circuit/Open

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Generic OBD-II
P22F6

Cylinder 8 Alternative Fuel Injector Control Circuit Low

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Generic OBD-II
P22F7

Cylinder 8 Alternative Fuel Injector Control Circuit High

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Generic OBD-II
P22F8

Cylinder 8 Alternative Fuel Injector Control Circuit Range/Performance

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Generic OBD-II
P22F9

A slow NOx rise can fail by initial delay or slower subsequent response

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Generic OBD-II
P22FA

upstream NOx response is evaluated during a fuel-cut transition

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Generic OBD-II
P22FB

engine-out NOx signal disagrees with its model

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Generic OBD-II
P22FC

NOx Sensor Performance - Slow Response Low to High Bank 1 Sensor 2

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Generic OBD-II
P22FD

NOx Sensor Performance - Slow Response High to Low Bank 1 Sensor 2

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Generic OBD-II
P22FE

post-catalyst NOx sensing-cell self-test fails

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Generic OBD-II
P22FF

Ford SCR inlet temperature stays below its target

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Generic OBD-II
P2300

Cylinder 1 ignition control circuit has a low electrical fault

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Generic OBD-II
P2301

Cylinder 1 ignition control circuit shows a power-short signature

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Generic OBD-II
P2302

Cylinder 1 ion-sensing circuit and secondary ignition diagnosis

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Generic OBD-II
P2303

Cylinder 2 ignition control is diagnosed electrically low

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Generic OBD-II
P2304

Cylinder 2 ignition output remains high in the monitored on state

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Generic OBD-II
P2305

Cylinder 2 ion-sensor signal error at lower engine speed

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Generic OBD-II
P2306

Cylinder 3 ignition control has a ground-short signature

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Generic OBD-II
P2307

Cylinder 3 ignition control fails its high-circuit check

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Generic OBD-II
P2308

Cylinder 3 ion-sensor input error and the P0303 decision

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Generic OBD-II
P2309

A coil low-circuit fault with an unresolved channel label

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Generic OBD-II
P230A

Cylinder 1 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

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Generic OBD-II
P230B

Cylinder 2 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

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Generic OBD-II
P230C

Cylinder 3 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

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Generic OBD-II
P230D

Cylinder 4 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

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Generic OBD-II
P230E

Cylinder 5 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

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Generic OBD-II
P230F

Cylinder 6 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

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Generic OBD-II
P2310

Why a coil high-circuit code needs a verified channel mapping

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Generic OBD-II
P2311

Cylinder 4 secondary-ignition code interpreted through ion sensing

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Generic OBD-II
P2312

Why a low ignition-driver signal needs its command state

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Generic OBD-II
P2313

Interpreting an ignition output that stays high when commanded on

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Generic OBD-II
P2314

Ignition Coil E Secondary Circuit

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Generic OBD-II
P2315

Separating ignition circuit low from a combustion misfire

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Generic OBD-II
P2316

Why ignition-driver high is judged during an on command

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Generic OBD-II
P2317

Ignition Coil F Secondary Circuit

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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.