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THE CODE DIRECTORY

Diagnostic code references — Page 86.

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

11,786 code references

Generic OBD-II
P2638

Torque Management Feedback Signal A Range/Performance

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Generic OBD-II
P2639

Torque Management Feedback Signal A Low

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Generic OBD-II
P263A

MIL Control Circuit Low

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Generic OBD-II
P263B

MIL Control Circuit High

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Generic OBD-II
P263C

Glow Plug Control Driver Performance

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Generic OBD-II
P263D

Reductant Heater Driver Performance

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Generic OBD-II
P263E

Glow Plug Control Module 1 Over Temperature

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Generic OBD-II
P263F

Glow Plug Control Module 2 Over Temperature

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Generic OBD-II
P2640

Torque Management Feedback Signal A High

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Generic OBD-II
P2641

Torque Management Feedback Signal B

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Generic OBD-II
P2642

Torque Management Feedback Signal B Range/Performance

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Generic OBD-II
P2643

Torque Management Feedback Signal B Low

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Generic OBD-II
P2644

Torque Management Feedback Signal B High

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Generic OBD-II
P2645

A Rocker Arm Actuator Control Circuit/Open Bank 1

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Generic OBD-II
P2646

A Rocker Arm Actuator System Performance/Stuck Off Bank 1

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Generic OBD-II
P2647

A Rocker Arm Actuator System Stuck On Bank 1

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Generic OBD-II
P2648

A Rocker Arm Actuator Control Circuit Low Bank 1

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Generic OBD-II
P2649

A Rocker Arm Actuator Control Circuit High Bank 1

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Generic OBD-II
P264A

A Rocker Arm Actuator Position Sensor Circuit Bank 1

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Generic OBD-II
P264B

A Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 1

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Generic OBD-II
P264C

A Rocker Arm Actuator Position Sensor Circuit Low Bank 1

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Generic OBD-II
P264D

A Rocker Arm Actuator Position Sensor Circuit High Bank 1

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Generic OBD-II
P264E

A Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic Bank 1

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Generic OBD-II
P264F

Engine Serial Number Not Programmed or Incompatible

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Generic OBD-II
P2650

B Rocker Arm Actuator Control Circuit/Open Bank 1

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Generic OBD-II
P2651

B Rocker Arm Actuator System Performance/Stuck Off Bank 1

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Generic OBD-II
P2652

B Rocker Arm Actuator System Stuck On Bank 1

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Generic OBD-II
P2653

B Rocker Arm Actuator Control Circuit Low Bank 1

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Generic OBD-II
P2654

B Rocker Arm Actuator Control Circuit High Bank 1

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Generic OBD-II
P2655

A Rocker Arm Actuator Control Circuit/Open Bank 2

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Generic OBD-II
P2656

A Rocker Arm Actuator System Performance/Stuck Off Bank 2

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Generic OBD-II
P2657

A Rocker Arm Actuator System Stuck On Bank 2

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Generic OBD-II
P2658

A Rocker Arm Actuator Control Circuit Low Bank 2

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Generic OBD-II
P2659

A Rocker Arm Actuator Control Circuit High Bank 2

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Generic OBD-II
P265A

B Rocker Arm Actuator Position Sensor Circuit Bank 1

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Generic OBD-II
P265B

B Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 1

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Generic OBD-II
P265C

B Rocker Arm Actuator Position Sensor Circuit Low Bank 1

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Generic OBD-II
P265D

B Rocker Arm Actuator Position Sensor Circuit High Bank 1

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Generic OBD-II
P265E

B Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic Bank 1

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Generic OBD-II
P265F

Variable A/C Compressor Control Circuit Range/Performance

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Generic OBD-II
P2660

B Rocker Arm Actuator Control Circuit/Open Bank 2

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Generic OBD-II
P2661

B Rocker Arm Actuator System Performance/Stuck Off Bank 2

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Generic OBD-II
P2662

B Rocker Arm Actuator System Stuck On Bank 2

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Generic OBD-II
P2663

B Rocker Arm Actuator Control Circuit Low Bank 2

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Generic OBD-II
P2664

B Rocker Arm Actuator Control Circuit High Bank 2

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Generic OBD-II
P2665

Fuel Shutoff Valve B Control Circuit/Open

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Generic OBD-II
P2666

Fuel Shutoff Valve B Control Circuit Low

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Generic OBD-II
P2667

Fuel Shutoff Valve B Control Circuit High

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Generic OBD-II
P2668

Fuel Mode Indicator Lamp Control Circuit

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Generic OBD-II
P2669

Actuator Supply Voltage B Circuit /Open

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Generic OBD-II
P266A

A Rocker Arm Actuator Position Sensor Circuit Bank 2

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Generic OBD-II
P266B

A Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 2

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Generic OBD-II
P266C

A Rocker Arm Actuator Position Sensor Circuit Low Bank 2

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Generic OBD-II
P266D

A Rocker Arm Actuator Position Sensor Circuit High Bank 2

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Generic OBD-II
P266E

A Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic Bank 2

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Generic OBD-II
P266F

A/C Refrigerant Distribution Valve A Control Circuit Driver Current/Temperature Too High

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Generic OBD-II
P2670

Actuator Supply Voltage B Circuit Low

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Generic OBD-II
P2671

Actuator Supply Voltage B Circuit High

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Generic OBD-II
P2672

Injection Pump Timing Offset

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Generic OBD-II
P2673

Injection Pump Timing Calibration Not Learned

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Generic OBD-II
P2674

Injection Pump Fuel Calibration Not Learned

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Generic OBD-II
P2675

Air Cleaner Inlet Control Circuit/Open

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Generic OBD-II
P2676

Air Cleaner Inlet Control Circuit Low

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Generic OBD-II
P2677

Air Cleaner Inlet Control Circuit High

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Generic OBD-II
P2678

Coolant Degassing Valve Control Circuit/Open

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Generic OBD-II
P2679

Coolant Degassing Valve Control Circuit Low

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Generic OBD-II
P267A

B Rocker Arm Actuator Position Sensor Circuit Bank 2

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Generic OBD-II
P267B

B Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 2

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Generic OBD-II
P267C

B Rocker Arm Actuator Position Sensor Circuit Low Bank 2

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Generic OBD-II
P267D

B Rocker Arm Actuator Position Sensor Circuit High Bank 2

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Generic OBD-II
P267E

B Rocker Arm Actuator Position Sensor Circuit Intermittent/Erratic Bank 2

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Generic OBD-II
P267F

Control Module Internal Temperature Sensor A Circuit Intermittent/Erratic

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Generic OBD-II
P2680

Coolant Degassing Valve Control Circuit High

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Generic OBD-II
P2681

Engine Coolant Bypass Valve A Control Circuit/Open

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Generic OBD-II
P2682

Engine Coolant Bypass Valve A Control Circuit Low

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Generic OBD-II
P2683

Engine Coolant Bypass Valve A Control Circuit High

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Generic OBD-II
P2684

Actuator Supply Voltage C Circuit/Open

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Generic OBD-II
P2685

Actuator Supply Voltage C Circuit Low

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Generic OBD-II
P2686

Actuator Supply Voltage C Circuit High

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Generic OBD-II
P2687

Fuel Supply Heater Control Circuit/Open

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Generic OBD-II
P2688

Fuel Supply Heater Control Circuit Low

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Generic OBD-II
P2689

Fuel Supply Heater Control Circuit High

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Generic OBD-II
P268A

Fuel Injector Calibration Not Learned/Programmed

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Generic OBD-II
P268B

High Pressure Fuel Pump Calibration Not Learned/Programmed

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Generic OBD-II
P268C

Cylinder 1 Injector Data Incompatible

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Generic OBD-II
P268D

Cylinder 2 Injector Data Incompatible

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Generic OBD-II
P268E

Cylinder 3 Injector Data Incompatible

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Generic OBD-II
P268F

Cylinder 4 Injector Data Incompatible

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Generic OBD-II
P2690

Cylinder 5 Injector Data Incompatible

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Generic OBD-II
P2691

Cylinder 6 Injector Data Incompatible

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Generic OBD-II
P2692

Cylinder 7 Injector Data Incompatible

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Generic OBD-II
P2693

Cylinder 8 Injector Data Incompatible

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Generic OBD-II
P2694

Cylinder 9 Injector Data Incompatible

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Generic OBD-II
P2695

Cylinder 10 Injector Data Incompatible

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Generic OBD-II
P2696

Injector Data Incompatible

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Generic OBD-II
P2697

Exhaust Aftertreatment Fuel Injector A Circuit/Open

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Generic OBD-II
P2698

Exhaust Aftertreatment Fuel Injector A Performance

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Generic OBD-II
P2699

Exhaust Aftertreatment Fuel Injector A Circuit Low

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Generic OBD-II
P269A

Exhaust Aftertreatment Fuel Injector A Circuit High

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Generic OBD-II
P269B

Exhaust Aftertreatment Glow Plug 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.