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THE CODE DIRECTORY

Diagnostic code references — Page 80.

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

11,786 code references

Generic OBD-II
P23E0

Cylinder 4 Fuel Heater Performance

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Generic OBD-II
P23E1

EGR C Control Circuit/Open

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Generic OBD-II
P23E2

EGR C Control Circuit Performance

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Generic OBD-II
P23E3

EGR C Control Circuit Low

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Generic OBD-II
P23E4

EGR C Control Circuit High

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Generic OBD-II
P23E5

EGR C Control Stuck Open

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Generic OBD-II
P23E6

EGR C Control Stuck Closed

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Generic OBD-II
P23E7

EGR C Flow Insufficient Detected

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Generic OBD-II
P23E8

EGR C Flow Excessive Detected

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Generic OBD-II
P23E9

Camshaft A Position Signal Output Circuit/Open Bank 2

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Generic OBD-II
P23EA

Camshaft A Position Signal Output Circuit Low Bank 2

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Generic OBD-II
P23EB

Camshaft A Position Signal Output Circuit High Bank 2

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Generic OBD-II
P23EC

Camshaft B Position Signal Output Circuit/Open Bank 1

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Generic OBD-II
P23ED

Camshaft B Position Signal Output Circuit Low Bank 1

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Generic OBD-II
P23EE

Camshaft B Position Signal Output Circuit High Bank 1

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Generic OBD-II
P23EF

Camshaft B Position Signal Output Circuit/Open Bank 2

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Generic OBD-II
P23F0

Camshaft B Position Signal Output Circuit Low Bank 2

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Generic OBD-II
P23F1

Camshaft B Position Signal Output Circuit High Bank 2

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Generic OBD-II
P23F2

Cylinder 1 Injector B Air-Fuel Ratio Imbalance

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Generic OBD-II
P23F3

Cylinder 2 Injector B Air-Fuel Ratio Imbalance

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Generic OBD-II
P23F4

Cylinder 3 Injector B Air-Fuel Ratio Imbalance

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Generic OBD-II
P23F5

Cylinder 4 Injector B Air-Fuel Ratio Imbalance

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Generic OBD-II
P23F6

Cylinder 5 Injector B Air-Fuel Ratio Imbalance

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Generic OBD-II
P23F7

Cylinder 6 Injector B Air-Fuel Ratio Imbalance

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Generic OBD-II
P23F8

Cylinder 7 Injector B Air-Fuel Ratio Imbalance

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Generic OBD-II
P23F9

Cylinder 8 Injector B Air-Fuel Ratio Imbalance

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Generic OBD-II
P23FA

Cylinder 9 Injector B Air-Fuel Ratio Imbalance

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Generic OBD-II
P23FB

Cylinder 10 Injector B Air-Fuel Ratio Imbalance

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Generic OBD-II
P23FC

Cylinder 11 Injector B Air-Fuel Ratio Imbalance

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Generic OBD-II
P23FD

Cylinder 12 Injector B Air-Fuel Ratio Imbalance

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Generic OBD-II
P23FE

Bank 1 System B Air-Fuel Ratio Imbalance

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Generic OBD-II
P23FF

Bank 2 System B Air-Fuel Ratio Imbalance

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Generic OBD-II
P2400

EVAP System Leak Detection Pump Control Circuit/Open

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Generic OBD-II
P2401

EVAP System Leak Detection Pump Control Circuit Low

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Generic OBD-II
P2402

EVAP System Leak Detection Pump Control Circuit High

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Generic OBD-II
P2403

EVAP System Leak Detection Pump Sense Circuit/Open

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Generic OBD-II
P2404

EVAP System Leak Detection Pump Sense Circuit Range/Performance

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Generic OBD-II
P2405

EVAP System Leak Detection Pump Sense Circuit Low

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Generic OBD-II
P2406

EVAP System Leak Detection Pump Sense Circuit High

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Generic OBD-II
P2407

EVAP System Leak Detection Pump Sense Circuit Intermittent/Erratic

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Generic OBD-II
P2408

Fuel Cap Sensor/Switch Circuit

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Generic OBD-II
P2409

Fuel Cap Sensor/Switch Circuit Range/Performance

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Generic OBD-II
P240A

EVAP System Leak Detection Pump Heater Control Circuit/Open

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Generic OBD-II
P240B

EVAP System Leak Detection Pump Heater Control Circuit Low

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Generic OBD-II
P240C

EVAP System Leak Detection Pump Heater Control Circuit High

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Generic OBD-II
P240D

Alternative Fuel Low Pressure System Leak

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Generic OBD-II
P240E

Alternative Fuel High Pressure System Leak

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Generic OBD-II
P240F

EGR Slow Response

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Generic OBD-II
P2410

Fuel Cap Sensor/Switch Circuit Low

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Generic OBD-II
P2411

Fuel Cap Sensor/Switch Circuit High

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Generic OBD-II
P2412

Fuel Cap Sensor/Switch Circuit Intermittent/Erratic

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Generic OBD-II
P2413

EGR System Performance

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Generic OBD-II
P2414

O2 Sensor Exhaust Sample Error Bank 1 Sensor 1

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Generic OBD-II
P2415

O2 Sensor Exhaust Sample Error Bank 2 Sensor 1

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Generic OBD-II
P2416

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

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Generic OBD-II
P2417

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

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Generic OBD-II
P2418

EVAP System Switching Valve Control Circuit/Open

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Generic OBD-II
P2419

EVAP System Switching Valve Control Circuit Low

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Generic OBD-II
P241A

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

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Generic OBD-II
P241B

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

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Generic OBD-II
P241C

Throttle Actuator Control System - Ice Blockage Bank 2

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Generic OBD-II
P241D

SCR Inducement - Forced Engine Shutdown

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Generic OBD-II
P241E

Reductant Heater Coolant Control Valve Stuck Closed

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Generic OBD-II
P241F

EGR Cooler B Efficiency Below Threshold

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Generic OBD-II
P2420

EVAP System Switching Valve Control Circuit High

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Generic OBD-II
P2421

EVAP System Vent Valve Stuck Open

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Generic OBD-II
P2422

EVAP System Vent Valve Stuck Closed

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Generic OBD-II
P2423

HC Adsorption Catalyst Efficiency Below Threshold Bank 1

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Generic OBD-II
P2424

HC Adsorption Catalyst Efficiency Below Threshold Bank 2

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Generic OBD-II
P2425

EGR Cooling Valve Control Circuit/Open

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Generic OBD-II
P2426

EGR Cooling Valve Control Circuit Low

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Generic OBD-II
P2427

EGR Cooling Valve Control Circuit High

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Generic OBD-II
P2428

Exhaust Gas Temperature Too High Bank 1

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Generic OBD-II
P2429

Exhaust Gas Temperature Too High Bank 2

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Generic OBD-II
P242A

Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 3

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Generic OBD-II
P242B

Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 3

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Generic OBD-II
P242C

Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 3

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Generic OBD-II
P242D

Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3

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Generic OBD-II
P242E

Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 3

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Generic OBD-II
P242F

Particulate Filter Restriction - Ash Accumulation Bank 1

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Generic OBD-II
P2430

AIR System Air Flow/Pressure Sensor Circuit Bank 1

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Generic OBD-II
P2431

AIR System Air Flow/Pressure Sensor Circuit Range/Performance Bank 1

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Generic OBD-II
P2432

AIR System Air Flow/Pressure Sensor Circuit Low Bank 1

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Generic OBD-II
P2433

AIR System Air Flow/Pressure Sensor Circuit High Bank 1

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Generic OBD-II
P2434

AIR System Air Flow/Pressure Sensor Circuit Intermittent/Erratic Bank 1

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Generic OBD-II
P2435

AIR System Air Flow/Pressure Sensor Circuit Bank 2

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Generic OBD-II
P2436

AIR System Air Flow/Pressure Sensor Circuit Range/Performance Bank 2

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Generic OBD-II
P2437

AIR System Air Flow/Pressure Sensor Circuit Low Bank 2

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Generic OBD-II
P2438

AIR System Air Flow/Pressure Sensor Circuit High Bank 2

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Generic OBD-II
P2439

AIR System Air Flow/Pressure Sensor Circuit Intermittent/Erratic Bank 2

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Generic OBD-II
P243A

Particulate Filter Restriction - Ash Accumulation Bank 2

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Generic OBD-II
P243B

Particulate Filter Restriction - Forced Limited Power Bank 2

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Generic OBD-II
P243C

Particulate Filter Regeneration Frequency Bank 2

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Generic OBD-II
P243D

Particulate Filter Regeneration Duration Bank 2

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Generic OBD-II
P243E

Particulate Filter Regeneration Incomplete Bank 2

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Generic OBD-II
P243F

Particulate Filter Restriction - Soot Accumulation Too High Bank 2

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Generic OBD-II
P2440

AIR System Switching Valve Stuck Open Bank 1

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Generic OBD-II
P2441

AIR System Switching Valve Stuck Closed Bank 1

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Generic OBD-II
P2442

AIR System Switching Valve Stuck Open Bank 2

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Generic OBD-II
P2443

AIR System Switching Valve Stuck Closed Bank 2

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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.