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THE CODE DIRECTORY

Diagnostic code references — Page 21.

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

11,786 code references

Generic OBD-II
P0539

A/C Evaporator Temperature Sensor Circuit Intermittent

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Generic OBD-II
P053A

PCV Heater A Control Circuit /Open

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Generic OBD-II
P053B

PCV Heater A Control Circuit Low

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Generic OBD-II
P053C

PCV Heater A Control Circuit High

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Generic OBD-II
P053D

PCV Heater A Performance

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Generic OBD-II
P053E

Crankcase Pressure Too High

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Generic OBD-II
P053F

Cold Start Fuel Pressure Performance Bank 1

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Generic OBD-II
P0540

Intake Air Heater A Circuit

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Generic OBD-II
P0541

Intake Air Heater A Circuit Low

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Generic OBD-II
P0542

Intake Air Heater A Circuit High

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Generic OBD-II
P0543

Intake Air Heater A Circuit Open

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Generic OBD-II
P0544

Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 1

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Generic OBD-II
P0545

Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 1

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Generic OBD-II
P0546

Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 1

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Generic OBD-II
P0547

Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 1

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Generic OBD-II
P0548

Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 1

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Generic OBD-II
P0549

Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 1

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Generic OBD-II
P054A

Cold Start B Camshaft Position Timing Over-Advanced Bank 1

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Generic OBD-II
P054B

Cold Start B Camshaft Position Timing Over-Retarded Bank 1

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Generic OBD-II
P054C

Cold Start B Camshaft Position Timing Over-Advanced Bank 2

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Generic OBD-II
P054D

Cold Start B Camshaft Position Timing Over-Retarded Bank 2

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Generic OBD-II
P054E

Idle Control System - Fuel Quantity Lower Than Expected

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Generic OBD-II
P054F

Idle Control System - Fuel Quantity Higher Than Expected

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Generic OBD-II
P0550

Power Steering Pressure Sensor/Switch Circuit

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Generic OBD-II
P0551

Power Steering Pressure Sensor/Switch Circuit Range/Performance

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Generic OBD-II
P0552

Power Steering Pressure Sensor/Switch Circuit Low

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Generic OBD-II
P0553

Power Steering Pressure Sensor/Switch Circuit High

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Generic OBD-II
P0554

Power Steering Pressure Sensor/Switch Circuit Intermittent

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Generic OBD-II
P0555

Brake Booster Pressure Sensor Circuit

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Generic OBD-II
P0556

Brake Booster Pressure Sensor Circuit Range/Performance

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Generic OBD-II
P0557

Brake Booster Pressure Sensor Circuit Low

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Generic OBD-II
P0558

Brake Booster Pressure Sensor Circuit High

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Generic OBD-II
P0559

Brake Booster Pressure Sensor Circuit Intermittent

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Generic OBD-II
P055A

Engine Oil Pressure Sensor/Switch B Circuit

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Generic OBD-II
P055B

Engine Oil Pressure Sensor/Switch B Range/Performance

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Generic OBD-II
P055C

Engine Oil Pressure Sensor/Switch B Low

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Generic OBD-II
P055D

Engine Oil Pressure Sensor/Switch B High

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Generic OBD-II
P055E

Oxygen Sensor Control Module System Voltage

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Generic OBD-II
P055F

Engine Oil Pressure Out of Range

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Generic OBD-II
P0560

System Voltage

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Generic OBD-II
P0561

System Voltage Unstable

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Generic OBD-II
P0562

System Voltage Low

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Generic OBD-II
P0563

System Voltage High

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Generic OBD-II
P0564

Cruise Control Multi-Function Input A Circuit

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Generic OBD-II
P0565

Cruise Control On Signal

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Generic OBD-II
P0566

Cruise Control Off Signal

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Generic OBD-II
P0567

Cruise Control Resume Signal

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Generic OBD-II
P0568

Cruise Control Set Signal

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Generic OBD-II
P0569

Cruise Control Coast Signal

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Generic OBD-II
P056A

Cruise Control Increase Distance Signal

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Generic OBD-II
P056B

Cruise Control Decrease Distance Signal

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Generic OBD-II
P056C

Cruise Control Cancel Signal

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Generic OBD-II
P056D

Reductant Control Module System Voltage

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Generic OBD-II
P056E

Cold Start Turbocharger/Supercharger Boost Control A Performance

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Generic OBD-II
P056F

Cold Start Turbocharger/Supercharger Boost Control B Performance

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Generic OBD-II
P0570

Cruise Control Accelerate Signal

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Generic OBD-II
P0571

Brake Switch A Circuit

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Generic OBD-II
P0572

Brake Switch A Circuit Low

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Generic OBD-II
P0573

Brake Switch A Circuit High

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Generic OBD-II
P0574

Cruise Control System - Vehicle Speed Too High

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Generic OBD-II
P0575

Cruise Control Input Circuit

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Generic OBD-II
P0576

Cruise Control Input Circuit Low

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Generic OBD-II
P0577

Cruise Control Input Circuit High

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Generic OBD-II
P0578

Cruise Control Multi-Function Input A Circuit Stuck

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Generic OBD-II
P0579

Cruise Control Multi-Function Input A Circuit Range/Performance

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Generic OBD-II
P057A

Brake Pedal Position Sensor A Circuit/Open

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Generic OBD-II
P057B

Brake Pedal Position Sensor A Circuit Range/Performance

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Generic OBD-II
P057C

Brake Pedal Position Sensor A Circuit Low

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Generic OBD-II
P057D

Brake Pedal Position Sensor A Circuit High

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Generic OBD-II
P057E

Brake Pedal Position Sensor A Circuit Intermittent/Erratic

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Generic OBD-II
P057F

Battery A State of Charge Performance

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Generic OBD-II
P0580

Cruise Control Multi-Function Input A Circuit Low

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Generic OBD-II
P0581

Cruise Control Multi-Function Input A Circuit High

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Generic OBD-II
P0582

Cruise Control Vacuum Control Circuit/Open

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Generic OBD-II
P0583

Cruise Control Vacuum Control Circuit Low

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Generic OBD-II
P0584

Cruise Control Vacuum Control Circuit High

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Generic OBD-II
P0585

Cruise Control Multi-Function Input A/B Correlation

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Generic OBD-II
P0586

Cruise Control Vent Control Circuit/Open

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Generic OBD-II
P0587

Cruise Control Vent Control Circuit Low

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Generic OBD-II
P0588

Cruise Control Vent Control Circuit High

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Generic OBD-II
P0589

Cruise Control Multi-Function Input B Circuit

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Generic OBD-II
P058A

Battery Monitor Module Performance

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Generic OBD-II
P058B

Battery Monitor Module Current Monitoring Performance

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Generic OBD-II
P058C

Battery Monitor Module Temperature Monitoring Performance

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Generic OBD-II
P058D

Battery Monitor Module Voltage Monitoring Performance

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Generic OBD-II
P058E

Battery Monitor Module Temperature Too High

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Generic OBD-II
P058F

Battery Monitor Module Temperature Too Low

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Generic OBD-II
P0590

Cruise Control Multi-Function Input B Circuit Stuck

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Generic OBD-II
P0591

Cruise Control Multi-Function Input B Circuit Range/Performance

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Generic OBD-II
P0592

Cruise Control Multi-Function Input B Circuit Low

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Generic OBD-II
P0593

Cruise Control Multi-Function Input B Circuit High

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Generic OBD-II
P0594

Cruise Control Servo Control Circuit/Open

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Generic OBD-II
P0595

Cruise Control Servo Control Circuit Low

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Generic OBD-II
P0596

Cruise Control Servo Control Circuit High

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Generic OBD-II
P0597

Thermostat Heater Control Circuit/Open

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Generic OBD-II
P0598

Thermostat Heater Control Circuit Low

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Generic OBD-II
P0599

Thermostat Heater Control Circuit High

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Generic OBD-II
P059A

Active Grille Air Shutter A Position Sensor Circuit

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Generic OBD-II
P059B

Active Grille Air Shutter A Position Sensor Circuit Range/Performance

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Generic OBD-II
P059C

Active Grille Air Shutter A Position Sensor Circuit High

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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.