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THE CODE DIRECTORY

Diagnostic code references — Page 84.

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

11,786 code references

Generic OBD-II
P2570

Direct Ozone Reduction Catalyst Temperature Sensor Circuit High

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Generic OBD-II
P2571

Direct Ozone Reduction Catalyst Temperature Sensor Circuit Intermittent/Erratic

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Generic OBD-II
P2572

Direct Ozone Reduction Catalyst Deterioration Sensor Circuit

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Generic OBD-II
P2573

Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Range/Performance

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Generic OBD-II
P2574

Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Low

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Generic OBD-II
P2575

Direct Ozone Reduction Catalyst Deterioration Sensor Circuit High

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Generic OBD-II
P2576

Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Intermittent/Erratic

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Generic OBD-II
P2577

Direct Ozone Reduction Catalyst Efficiency Below Threshold

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Generic OBD-II
P2578

Turbocharger/Supercharger Speed Sensor A Circuit

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Generic OBD-II
P2579

Turbocharger/Supercharger Speed Sensor A Circuit Range/Performance

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Generic OBD-II
P257A

Vacuum Reservoir Control Circuit/Open

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Generic OBD-II
P257B

Vacuum Reservoir Control Circuit Low

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Generic OBD-II
P257C

Vacuum Reservoir Control Circuit High

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Generic OBD-II
P257D

Engine Hood Switch Circuit Range/Performance

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Generic OBD-II
P257E

Engine Hood Switch Circuit Low

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Generic OBD-II
P257F

Engine Hood Switch Circuit High

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Generic OBD-II
P2580

Turbocharger/Supercharger Speed Sensor A Circuit Low

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Generic OBD-II
P2581

Turbocharger/Supercharger Speed Sensor A Circuit High

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Generic OBD-II
P2582

Turbocharger/Supercharger Speed Sensor A Circuit Intermittent

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Generic OBD-II
P2583

Cruise Control Front Distance Range Sensor Single Sensor or Center

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Generic OBD-II
P2584

Fuel Additive Control Module Requested MIL Illumination

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Generic OBD-II
P2585

Fuel Additive Control Module Warning Lamp Request

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Generic OBD-II
P2586

Turbocharger Boost Control Position Sensor B Circuit

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Generic OBD-II
P2587

Turbocharger Boost Control Position Sensor B Circuit Range/Performance

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Generic OBD-II
P2588

Turbocharger Boost Control Position Sensor B Circuit Low

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Generic OBD-II
P2589

Turbocharger Boost Control Position Sensor B Circuit High

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Generic OBD-II
P258A

Vacuum Pump Control Circuit A/Open

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Generic OBD-II
P258B

Vacuum Pump Control Circuit A Range/Performance

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Generic OBD-II
P258C

Vacuum Pump Control Circuit A Low

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Generic OBD-II
P258D

Vacuum Pump Control Circuit A High

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Generic OBD-II
P258E

PTO Enable Switch Performance

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Generic OBD-II
P258F

Torque Management Request Output Signal

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Generic OBD-II
P2590

Turbocharger Boost Control Position Sensor B Circuit Intermittent/Erratic

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Generic OBD-II
P2591

Cruise Control Front Distance Range Sensor Left

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Generic OBD-II
P2592

Cruise Control Front Distance Range Sensor Right

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Generic OBD-II
P2593

Turbocharger Speed Sensor B Circuit

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Generic OBD-II
P2594

Turbocharger Speed Sensor B Circuit Range/Performance

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Generic OBD-II
P2595

Turbocharger Speed Sensor B Circuit Low

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Generic OBD-II
P2596

Turbocharger Speed Sensor B Circuit High

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Generic OBD-II
P2597

Turbocharger Speed Sensor B Circuit Intermittent

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Generic OBD-II
P2598

Turbocharger Boost Control Position Sensor A Performance - Stuck Low

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Generic OBD-II
P2599

Turbocharger Boost Control Position Sensor A Performance - Stuck High

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Generic OBD-II
P259A

Turbocharger Boost Control Position Sensor B Performance - Stuck Low

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Generic OBD-II
P259B

Turbocharger Boost Control Position Sensor B Performance - Stuck High

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Generic OBD-II
P259C

Excessive Time To Enter Closed Loop Turbocharger A Boost Control

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Generic OBD-II
P259D

Excessive Time To Enter Closed Loop Turbocharger B Boost Control

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Generic OBD-II
P259E

Turbocharger A Boost Control Position At Low Limit

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Generic OBD-II
P259F

Turbocharger A Boost Control Position At High Limit

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Generic OBD-II
P25A0

Turbocharger B Boost Control Position At Low Limit

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Generic OBD-II
P25A1

Turbocharger B Boost Control Position At High Limit

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Generic OBD-II
P25A2

Brake System Control Module A Requested MIL Illumination

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Generic OBD-II
P25A3

Engine Hood Open

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Generic OBD-II
P25A4

Fuel Mode Select Switch Circuit

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Generic OBD-II
P25A5

Fuel Mode Select Switch Performance

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Generic OBD-II
P25A6

Fuel Mode Select Switch Circuit Low

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Generic OBD-II
P25A7

Fuel Mode Select Switch Circuit High

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Generic OBD-II
P25A8

Fuel Mode Select Switch Circuit Intermittent/Erratic

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Generic OBD-II
P25A9

Piston Cooling Oil Control Circuit/Open

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Generic OBD-II
P25AA

Piston Cooling Oil Control Circuit Low

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Generic OBD-II
P25AB

Piston Cooling Oil Control Circuit High

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Generic OBD-II
P25AC

Piston Cooling Oil Control Circuit Performance/Stuck Off

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Generic OBD-II
P25AD

Piston Cooling Oil Control Circuit Stuck On

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Generic OBD-II
P25AE

Piston Cooling Oil Pressure Too Low

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Generic OBD-II
P25AF

Coolant Temperature Control Module Requested MIL Illumination

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Generic OBD-II
P25B0

Fuel Level Sensor A Stuck

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Generic OBD-II
P25B1

Fuel Level Sensor B Stuck

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Generic OBD-II
P25B2

Fuel Level Sensor A or B Stuck

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Generic OBD-II
P25B3

Turbocharger/Supercharger Wastegate A Stuck Open

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Generic OBD-II
P25B4

Turbocharger/Supercharger Wastegate A Stuck Closed

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Generic OBD-II
P25B5

Turbocharger/Supercharger Wastegate B Stuck Open

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Generic OBD-II
P25B6

Turbocharger/Supercharger Wastegate B Stuck Closed

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Generic OBD-II
P25B7

Auxiliary Ignition Switch On/Start Position Circuit

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Generic OBD-II
P25B8

Auxiliary Ignition Switch On/Start Position Circuit Low

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Generic OBD-II
P25B9

Auxiliary Ignition Switch On/Start Position Circuit High

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Generic OBD-II
P25BA

Regeneration Control Switch Circuit/Open

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Generic OBD-II
P25BB

Regeneration Control Switch Circuit Low

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Generic OBD-II
P25BC

Regeneration Control Switch Circuit High

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Generic OBD-II
P25BD

Unmetered Fuel - Forced Engine Shutdown

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Generic OBD-II
P25BE

Alternative Fuel Disable Control Circuit/Open

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Generic OBD-II
P25BF

Alternative Fuel Disable Control Circuit High

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Generic OBD-II
P25C0

Alternative Fuel Disable Control Circuit Low

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Generic OBD-II
P25C1

Alternative Fuel Disable Signal Circuit

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Generic OBD-II
P25C2

Alternative Fuel Disable Signal Circuit High

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Generic OBD-II
P25C3

Alternative Fuel Disable Signal Circuit Low

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Generic OBD-II
P25C4

Brake Booster Temperature Sensor A Circuit

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Generic OBD-II
P25C5

Brake Booster Temperature Sensor A Circuit Range/Performance

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Generic OBD-II
P25C6

Brake Booster Temperature Sensor A Circuit Low

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Generic OBD-II
P25C7

Brake Booster Temperature Sensor A Circuit High

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Generic OBD-II
P25C8

Brake Booster Temperature Sensor A Circuit Intermittent/Erratic

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Generic OBD-II
P25C9

Brake System Control Module B Requested MIL Illumination

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Generic OBD-II
P25CA

Intake Camshaft Actuator Park Lock Control Circuit/Open Bank 1

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Generic OBD-II
P25CB

Intake Camshaft Actuator Park Lock Control Circuit Low Bank 1

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Generic OBD-II
P25CC

Intake Camshaft Actuator Park Lock Control Circuit High Bank 1

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Generic OBD-II
P25CD

Intake Camshaft Actuator Park Lock Control Circuit/Open Bank 2

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Generic OBD-II
P25CE

Intake Camshaft Actuator Park Lock Control Circuit Low Bank 2

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Generic OBD-II
P25CF

Intake Camshaft Actuator Park Lock Control Circuit High Bank 2

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Generic OBD-II
P25D0

Exhaust Camshaft Actuator Park Lock Control Circuit/Open Bank 1

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Generic OBD-II
P25D1

Exhaust Camshaft Actuator Park Lock Control Circuit Low Bank 1

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Generic OBD-II
P25D2

Exhaust Camshaft Actuator Park Lock Control Circuit High Bank 1

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Generic OBD-II
P25D3

Exhaust Camshaft Actuator Park Lock Control Circuit/Open 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.