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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 circuit low is assessed while the lamp driver is off

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Generic OBD-II
P263B

The MIL output remains high during an on command

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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 can be an electronics temperature fault

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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

An engine serial-number field left unprogrammed

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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 B open-load can be detected at shutdown

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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

Transmission actuator supply B is low or electrically open

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Generic OBD-II
P2671

Supply B high is a shutdown switch test in this controller

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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

Coolant bypass valve open-load detection is an electrical finding

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Generic OBD-II
P2682

Coolant bypass control low means a reported short to ground

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Generic OBD-II
P2683

Coolant bypass actuator high is a short-to-power classification

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Generic OBD-II
P2684

Supply C open-load is tested through HSO7 at powerdown

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Generic OBD-II
P2685

Supply C low can arise from voltage collapse or excess current

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Generic OBD-II
P2686

Supply C high is checked after HSO7 is switched off

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Generic OBD-II
P2687

fuel-filter heater open-circuit detection uses off-state feedback

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Generic OBD-II
P2688

fuel-filter heater feedback indicates the short-to-ground branch

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Generic OBD-II
P2689

fuel-heater feedback remains high during an on command

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Generic OBD-II
P268A

injector calibration data fails its programming-integrity check

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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 adjustment data has not been programmed

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Generic OBD-II
P268D

cylinder 2 injector adjustment record is missing

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Generic OBD-II
P268E

cylinder 3 injector adjustment data is unprogrammed

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Generic OBD-II
P268F

cylinder 4 injector adjustment code has not been stored

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Generic OBD-II
P2690

cylinder 5 injector adjustment data is absent

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Generic OBD-II
P2691

cylinder 6 injector adjustment record has not been programmed

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Generic OBD-II
P2692

Cylinder-seven injector data is missing or fails validation

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Generic OBD-II
P2693

Cylinder-eight injector coding needs a valid individual record

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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 fault recorded as repeated internal-memory write errors

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Generic OBD-II
P2697

Exhaust Aftertreatment Fuel Injector A Circuit/Open

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Generic OBD-II
P2698

Downstream injection leakage can be inferred from temperature or oxygen

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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.