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THE CODE DIRECTORY

Diagnostic code references — Page 81.

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

11,786 code references

Generic OBD-II
P2444

AIR System Pump Stuck On Bank 1

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Generic OBD-II
P2445

AIR System Pump Stuck Off Bank 1

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Generic OBD-II
P2446

AIR System Pump Stuck On Bank 2

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Generic OBD-II
P2447

AIR System Pump Stuck Off Bank 2

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Generic OBD-II
P2448

AIR System High Air Flow Bank 1

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Generic OBD-II
P2449

AIR System High Air Flow Bank 2

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Generic OBD-II
P244A

Particulate Filter Differential Pressure Too Low Bank 1

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Generic OBD-II
P244B

Particulate Filter Differential Pressure Too High Bank 1

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Generic OBD-II
P244C

Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 1

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Generic OBD-II
P244D

Exhaust Temperature Too High For Particulate Filter Regeneration Bank 1

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Generic OBD-II
P244E

Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 2

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Generic OBD-II
P244F

Exhaust Temperature Too High For Particulate Filter Regeneration Bank 2

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Generic OBD-II
P2450

EVAP System Switching Valve Performance/Stuck Open

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Generic OBD-II
P2451

EVAP System Switching Valve Stuck Closed

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Generic OBD-II
P2452

Particulate Filter Pressure Sensor A Circuit

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Generic OBD-II
P2453

Particulate Filter Pressure Sensor A Circuit Range/Performance

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Generic OBD-II
P2454

Particulate Filter Pressure Sensor A Circuit Low

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Generic OBD-II
P2455

Particulate Filter Pressure Sensor A Circuit High

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Generic OBD-II
P2456

Particulate Filter Pressure Sensor A Circuit Intermittent/Erratic

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Generic OBD-II
P2457

EGR Cooler A Efficiency Below Threshold

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Generic OBD-II
P2458

Particulate Filter Regeneration Duration Bank 1

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Generic OBD-II
P2459

Particulate Filter Regeneration Frequency Bank 1

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Generic OBD-II
P245A

EGR Cooler Bypass Control Circuit/Open Bank 1

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Generic OBD-II
P245B

EGR Cooler Bypass Control Circuit Range/Performance Bank 1

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Generic OBD-II
P245C

EGR Cooler Bypass Control Circuit Low Bank 1

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Generic OBD-II
P245D

EGR Cooler Bypass Control Circuit High Bank 1

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Generic OBD-II
P245E

Particulate Filter Pressure Sensor B Circuit

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Generic OBD-II
P245F

Particulate Filter Pressure Sensor B Circuit Range/Performance

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Generic OBD-II
P2460

Particulate Filter Pressure Sensor B Circuit Low

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Generic OBD-II
P2461

Particulate Filter Pressure Sensor B Circuit High

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Generic OBD-II
P2462

Particulate Filter Pressure Sensor B Circuit Intermittent/Erratic

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Generic OBD-II
P2463

Particulate Filter Restriction - Soot Accumulation Bank 1

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Generic OBD-II
P2464

Particulate Filter Differential Pressure Too Low Bank 2

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Generic OBD-II
P2465

Particulate Filter Differential Pressure Too High Bank 2

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Generic OBD-II
P2466

Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 3

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Generic OBD-II
P2467

Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 3

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Generic OBD-II
P2468

Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 3

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Generic OBD-II
P2469

Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 3

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Generic OBD-II
P246A

Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 3

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Generic OBD-II
P246B

Vehicle Conditions Incorrect for Particulate Filter Regeneration

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Generic OBD-II
P246C

Particulate Filter Restriction - Forced Limited Power Bank 1

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Generic OBD-II
P246D

Particulate Filter Pressure Sensor A/B Correlation

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Generic OBD-II
P246E

Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 4

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Generic OBD-II
P246F

Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 4

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Generic OBD-II
P2470

Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 4

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Generic OBD-II
P2471

Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 4

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Generic OBD-II
P2472

Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 4

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Generic OBD-II
P2473

Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4

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Generic OBD-II
P2474

Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 4

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Generic OBD-II
P2475

Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 4

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Generic OBD-II
P2476

Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 4

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Generic OBD-II
P2477

Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 4

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Generic OBD-II
P2478

Exhaust Gas Temperature Out of Range Bank 1 Sensor 1

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Generic OBD-II
P2479

Exhaust Gas Temperature Out of Range Bank 1 Sensor 2

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Generic OBD-II
P247A

Exhaust Gas Temperature Out of Range Bank 1 Sensor 3

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Generic OBD-II
P247B

Exhaust Gas Temperature Out of Range Bank 1 Sensor 4

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Generic OBD-II
P247C

Exhaust Gas Temperature Out of Range Bank 2 Sensor 1

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Generic OBD-II
P247D

Exhaust Gas Temperature Out of Range Bank 2 Sensor 2

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Generic OBD-II
P247E

Exhaust Gas Temperature Out of Range Bank 2 Sensor 3

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Generic OBD-II
P247F

Exhaust Gas Temperature Out of Range Bank 2 Sensor 4

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Generic OBD-II
P2480

Exhaust Gas Temperature Sensor Circuit/Open Bank 1 Sensor 5

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Generic OBD-II
P2481

Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 5

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Generic OBD-II
P2482

Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 5

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Generic OBD-II
P2483

Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 5

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Generic OBD-II
P2484

Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 5

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Generic OBD-II
P2485

Exhaust Gas Temperature Sensor Circuit/Open Bank 2 Sensor 5

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Generic OBD-II
P2486

Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 5

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Generic OBD-II
P2487

Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 5

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Generic OBD-II
P2488

Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 5

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Generic OBD-II
P2489

Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 5

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Generic OBD-II
P248A

Reductant Heater A Sense Circuit Low

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Generic OBD-II
P248B

Reductant Heater A Sense Circuit High

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Generic OBD-II
P248C

Reductant Heater B Sense Circuit Low

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Generic OBD-II
P248D

Reductant Heater B Sense Circuit High

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Generic OBD-II
P248E

EGR Cooler Bypass Control Circuit/Open Bank 2

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Generic OBD-II
P248F

EGR Cooler Bypass Control Circuit Range/Performance Bank 2

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Generic OBD-II
P2490

EGR Cooler Bypass Control Circuit Low Bank 2

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Generic OBD-II
P2491

EGR Cooler Bypass Control Circuit High Bank 2

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Generic OBD-II
P2492

EGR Cooler Bypass Position Sensor Circuit Bank 1

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Generic OBD-II
P2493

EGR Cooler Bypass Position Sensor Range/Performance Bank 1

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Generic OBD-II
P2494

EGR Cooler Bypass Position Sensor Circuit Low Bank 1

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Generic OBD-II
P2495

EGR Cooler Bypass Position Sensor Circuit High Bank 1

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Generic OBD-II
P2496

EGR Cooler Bypass Position Sensor Circuit Intermittent/Erratic Bank 1

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Generic OBD-II
P2497

EGR Cooler Bypass Position Sensor Circuit Bank 2

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Generic OBD-II
P2498

EGR Cooler Bypass Position Sensor Range/Performance Bank 2

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Generic OBD-II
P2499

EGR Cooler Bypass Position Sensor Circuit Low Bank 2

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Generic OBD-II
P249A

EGR Cooler Bypass Position Sensor Circuit High Bank 2

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Generic OBD-II
P249B

EGR Cooler Bypass Position Sensor Circuit Intermittent/Erratic Bank 2

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Generic OBD-II
P249C

Excessive Time To Enter Closed Loop Reductant Injection Control

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Generic OBD-II
P249D

Closed Loop Reductant Injection Control At Limit - Flow Too Low

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Generic OBD-II
P249E

Closed Loop Reductant Injection Control At Limit - Flow Too High

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Generic OBD-II
P249F

Excessive Time To Enter Closed Loop Particulate Filter Regeneration Control

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Generic OBD-II
P24A0

Closed Loop Particulate Filter Regeneration Control At Limit - Temperature Too Low

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Generic OBD-II
P24A1

Closed Loop Particulate Filter Regeneration Control At Limit - Temperature Too High

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Generic OBD-II
P24A2

Particulate Filter Regeneration Incomplete Bank 1

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Generic OBD-II
P24A3

Particulate Filter Restriction - Soot Accumulation Bank 2

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Generic OBD-II
P24A4

Particulate Filter Restriction - Soot Accumulation Too High Bank 1

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Generic OBD-II
P24A5

EGR Cooler Bypass Control Stuck/Open Bank 1

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Generic OBD-II
P24A6

EGR Cooler Bypass Control Stuck/Open Bank 2

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Generic OBD-II
P24A7

EGR Cooler Coolant Pump Control Circuit/Open

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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.