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THE CODE DIRECTORY

Diagnostic code references — Page 82.

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

11,786 code references

Generic OBD-II
P24A8

EGR Cooler Coolant Pump Performance/Stuck Off

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Generic OBD-II
P24A9

EGR Cooler Coolant Pump Control Circuit Low

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Generic OBD-II
P24AA

EGR Cooler Coolant Pump Control Circuit High

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Generic OBD-II
P24AB

EGR Cooler Coolant Pump Stuck On

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Generic OBD-II
P24AC

EGR Cooler Coolant Pump Feedback Circuit Low

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Generic OBD-II
P24AD

EGR Cooler Coolant Pump Feedback Circuit High

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Generic OBD-II
P24AE

Particulate Matter Sensor Circuit

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Generic OBD-II
P24AF

Particulate Matter Sensor Circuit Range/Performance

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Generic OBD-II
P24B0

Particulate Matter Sensor Circuit Low

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Generic OBD-II
P24B1

Particulate Matter Sensor Circuit High

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Generic OBD-II
P24B2

Particulate Matter Sensor Circuit Intermittent

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Generic OBD-II
P24B3

Particulate Matter Sensor Heater Control Circuit/Open

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Generic OBD-II
P24B4

Particulate Matter Sensor Heater Control Circuit Range/Performance

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Generic OBD-II
P24B5

Particulate Matter Sensor Heater Control Circuit Low

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Generic OBD-II
P24B6

Particulate Matter Sensor Heater Control Circuit High

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Generic OBD-II
P24B7

Particulate Matter Sensor Heater Resistance

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Generic OBD-II
P24B8

EVAP System Leak Detection Pump Pressure Sensor Circuit

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Generic OBD-II
P24B9

EVAP System Leak Detection Pump Pressure Sensor Circuit Range/Performance

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Generic OBD-II
P24BA

EVAP System Leak Detection Pump Pressure Sensor Circuit Low

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Generic OBD-II
P24BB

EVAP System Leak Detection Pump Pressure Sensor Circuit High

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Generic OBD-II
P24BC

EVAP System Leak Detection Pump Pressure Sensor Circuit Intermittent

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Generic OBD-II
P24BD

EVAP System Leak Detection Pump Switching Valve Control Circuit/Open

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Generic OBD-II
P24BE

EVAP System Leak Detection Pump Switching Valve Control Circuit Low

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Generic OBD-II
P24BF

EVAP System Leak Detection Pump Switching Valve Control Circuit High

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Generic OBD-II
P24C0

EVAP System Leak Detection Pump Switching Valve Stuck On

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Generic OBD-II
P24C1

EVAP System Leak Detection Pump Switching Valve Performance/Stuck Off

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Generic OBD-II
P24C2

Exhaust Gas Temperature Measurement System - Multiple Sensor Correlation Bank 1

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Generic OBD-II
P24C3

Exhaust Gas Temperature Measurement System - Multiple Sensor Correlation Bank 2

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Generic OBD-II
P24C4

EGR Cooler Bypass Position Sensor Exceeded Learning Limit Bank 1

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Generic OBD-II
P24C5

EGR Cooler Bypass Position Sensor Exceeded Learning Limit Bank 2

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Generic OBD-II
P24C6

Particulate Matter Sensor Temperature Circuit

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Generic OBD-II
P24C7

Particulate Matter Sensor Temperature Circuit Range/performance

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Generic OBD-II
P24C8

Particulate Matter Sensor Temperature Circuit Low

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Generic OBD-II
P24C9

Particulate Matter Sensor Temperature Circuit High

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Generic OBD-II
P24CA

Particulate Matter Sensor Temperature Circuit Intermittent

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Generic OBD-II
P24CB

Reductant Tank Cap Switch Circuit

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Generic OBD-II
P24CC

Reductant Tank Cap Switch Circuit Range/Performance

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Generic OBD-II
P24CD

Reductant Tank Cap Switch Circuit Low

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Generic OBD-II
P24CE

Reductant Tank Cap Switch Circuit High

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Generic OBD-II
P24CF

Reductant Tank Cap Switch Circuit Intermittent/Erratic

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Generic OBD-II
P24D0

Particulate Matter Sensor Supply Voltage Circuit Low

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Generic OBD-II
P24D1

Particulate Matter Sensor Regeneration Incomplete

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Generic OBD-II
P24D2

Reductant Heater A Sense Circuit

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Generic OBD-II
P24D3

Reductant Heater B Sense Circuit

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Generic OBD-II
P24D4

EGR Cooler Coolant Pump Feedback Circuit

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Generic OBD-II
P24D5

EVAP System Pressure Sensor/Switch B Circuit

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Generic OBD-II
P24D6

EVAP System Pressure Sensor/Switch B Circuit Range/Performance

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Generic OBD-II
P24D7

EVAP System Pressure Sensor/Switch B Circuit Low

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Generic OBD-II
P24D8

EVAP System Pressure Sensor/Switch B Circuit High

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Generic OBD-II
P24D9

EVAP System Pressure Sensor/Switch B Circuit Intermittent

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Generic OBD-II
P24DA

Particulate Matter Sensor Exhaust Sample Error Bank 1

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Generic OBD-II
P24DB

Reductant Purge Control Valve B Circuit /Open

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Generic OBD-II
P24DC

Reductant Purge Control Valve B Performance

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Generic OBD-II
P24DD

Reductant Purge Control Valve B Circuit Low

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Generic OBD-II
P24DE

Reductant Purge Control Valve B Circuit High

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Generic OBD-II
P24DF

Reductant Purge Control Valve B Stuck Open

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Generic OBD-II
P24E0

Reductant Purge Control Valve B Stuck Closed

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Generic OBD-II
P24E1

NH3 Sensor Circuit

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Generic OBD-II
P24E2

NH3 Sensor Circuit Range/Performance

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Generic OBD-II
P24E3

NH3 Sensor Circuit Low

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Generic OBD-II
P24E4

NH3 Sensor Circuit High

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Generic OBD-II
P24E5

NH3 Sensor Circuit Intermittent/Erratic

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Generic OBD-II
P24E6

NH3 Sensor Heater Circuit/Open

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Generic OBD-II
P24E7

NH3 Sensor Heater Circuit Low

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Generic OBD-II
P24E8

NH3 Sensor Heater Circuit High

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Generic OBD-II
P24E9

NH3 Sensor Heater Circuit Performance

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Generic OBD-II
P24EA

NH3 Sensor Supply Voltage Circuit

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Generic OBD-II
P24EB

NH3 Sensor Supply Voltage Circuit Low

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Generic OBD-II
P24EC

NH3 Sensor Supply Voltage Circuit High

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Generic OBD-II
P24ED

NH3 Sensor Calibration Memory

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Generic OBD-II
P24EE

NH3 Sensor Processor Performance

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Generic OBD-II
P24EF

Control Module Wake-up Circuit/Open

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Generic OBD-II
P24F0

Control Module Wake-up Circuit Low

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Generic OBD-II
P24F1

Control Module Wake-up Circuit High

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Generic OBD-II
P24F2

EGR Temperature/Charge Air Cooler Temperature Correlation

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Generic OBD-II
P24F3

Reductant Tank Temperature/Fuel Temperature Correlation

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Generic OBD-II
P24F4

NOx Sensor Delayed Response - High to Low Bank 1 Sensor 1

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Generic OBD-II
P24F5

NOx Sensor Delayed Response - High to Low Bank 1 Sensor 2

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Generic OBD-II
P24F6

Exhaust Aftertreatment Fuel Air Purge Valve Stuck Open

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Generic OBD-II
P24F7

Exhaust Aftertreatment Fuel Air Purge Valve Stuck Closed

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Generic OBD-II
P24F8

Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit

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Generic OBD-II
P24F9

Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit Range/Performance

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Generic OBD-II
P24FA

Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit Low

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Generic OBD-II
P24FB

Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit High

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Generic OBD-II
P24FC

Particulate Matter Sensor Heater Control Circuit Driver Current/Temperature Too High

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Generic OBD-II
P24FD

Particulate Filter A Incorrect

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Generic OBD-II
P24FE

SCR Catalyst Incorrect

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Generic OBD-II
P24FF

Reductant Temperature Too High

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Generic OBD-II
P2500

Generator Lamp/L-Terminal Circuit Low

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Generic OBD-II
P2501

Generator Lamp/L-Terminal Circuit High

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Generic OBD-II
P2502

Charging System Voltage

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Generic OBD-II
P2503

Charging System Voltage Low

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Generic OBD-II
P2504

Charging System Voltage High

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Generic OBD-II
P2505

ECM/PCM Power Input Signal

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Generic OBD-II
P2506

ECM/PCM Power Input Signal Range/Performance

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Generic OBD-II
P2507

ECM/PCM Power Input Signal Low

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Generic OBD-II
P2508

ECM/PCM Power Input Signal High

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Generic OBD-II
P2509

ECM/PCM Power Input Signal Intermittent

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Generic OBD-II
P250A

Engine Oil Level Sensor Circuit

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Generic OBD-II
P250B

Engine Oil Level Sensor Circuit Range/Performance

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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.