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Powertrain code references — Page 65.

Engine, transmission and powertrain diagnostic references. Exact vehicle and module context still matters.

9,891 code references in powertrain

Generic OBD-II
P209F

Reductant Tank Heater Control Circuit Performance

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Generic OBD-II
P20A0

Reductant Purge Control Valve A Circuit /Open

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Generic OBD-II
P20A1

Reductant Purge Control Valve A Performance

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Generic OBD-II
P20A2

Reductant Purge Control Valve A Circuit Low

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Generic OBD-II
P20A3

Reductant Purge Control Valve A Circuit High

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Generic OBD-II
P20A4

Reductant Purge Control Valve A Stuck Open

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Generic OBD-II
P20A5

Reductant Purge Control Valve A Stuck Closed

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Generic OBD-II
P20A6

Reductant Injection Air Pressure Control Valve Circuit/Open

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Generic OBD-II
P20A7

Reductant Injection Air Pressure Control Valve Performance

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Generic OBD-II
P20A8

Reductant Injection Air Pressure Control Valve Circuit Low

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Generic OBD-II
P20A9

Reductant Injection Air Pressure Control Valve Circuit High

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Generic OBD-II
P20AA

Reductant Injection Air Pressure Control Valve Stuck Open

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Generic OBD-II
P20AB

Reductant Injection Air Pressure Control Valve Stuck Closed

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Generic OBD-II
P20AC

Reductant Metering Unit Temperature Sensor Circuit

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Generic OBD-II
P20AD

Reductant Metering Unit Temperature Sensor Circuit Range/Performance

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Generic OBD-II
P20AE

Reductant Metering Unit Temperature Sensor Circuit Low

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Generic OBD-II
P20AF

Reductant Metering Unit Temperature Sensor Circuit High

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Generic OBD-II
P20B0

Reductant Metering Unit Temperature Sensor Circuit Intermittent/Erratic

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Generic OBD-II
P20B1

Reductant Heater Coolant Control Valve Circuit/Open

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Generic OBD-II
P20B2

Reductant Heater Coolant Control Valve Performance/Stuck Open

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Generic OBD-II
P20B3

Reductant Heater Coolant Control Valve Circuit Low

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Generic OBD-II
P20B4

Reductant Heater Coolant Control Valve Circuit High

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Generic OBD-II
P20B5

Reductant Metering Unit Heater Control Circuit/Open

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Generic OBD-II
P20B6

Reductant Metering Unit Heater Control Circuit Performance

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Generic OBD-II
P20B7

Reductant Metering Unit Heater Control Circuit Low

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Generic OBD-II
P20B8

Reductant Metering Unit Heater Control Circuit High

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Generic OBD-II
P20B9

Reductant Heater A Control Circuit/Open

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Generic OBD-II
P20BA

Reductant Heater A Control Circuit Performance

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Generic OBD-II
P20BB

Reductant Heater A Control Circuit Low

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Generic OBD-II
P20BC

Reductant Heater A Control Circuit High

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Generic OBD-II
P20BD

Reductant Heater B Control Circuit/Open

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Generic OBD-II
P20BE

Reductant Heater B Control Circuit Performance

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Generic OBD-II
P20BF

Reductant Heater B Control Circuit Low

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Generic OBD-II
P20C0

Reductant Heater B Control Circuit High

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Generic OBD-II
P20C1

Reductant Heater C Control Circuit/Open

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Generic OBD-II
P20C2

Reductant Heater C Control Circuit Performance

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Generic OBD-II
P20C3

Reductant Heater C Control Circuit Low

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Generic OBD-II
P20C4

Reductant Heater C Control Circuit High

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Generic OBD-II
P20C5

Reductant Heater D Control Circuit/Open

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Generic OBD-II
P20C6

Reductant Heater D Control Circuit Performance

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Generic OBD-II
P20C7

Reductant Heater D Control Circuit Low

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Generic OBD-II
P20C8

Reductant Heater D Control Circuit High

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Generic OBD-II
P20C9

Reductant Control Module Requested MIL Illumination

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Generic OBD-II
P20CA

Reductant Injection Air Pressure Leakage

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Generic OBD-II
P20CB

Exhaust Aftertreatment Fuel Injector A Control Circuit/Open

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Generic OBD-II
P20CC

Exhaust Aftertreatment Fuel Injector A Control Performance

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Generic OBD-II
P20CD

Exhaust Aftertreatment Fuel Injector A Control Circuit Low

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Generic OBD-II
P20CE

Exhaust Aftertreatment Fuel Injector A Control Circuit High

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Generic OBD-II
P20CF

Exhaust Aftertreatment Fuel Injector A Stuck Open

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Generic OBD-II
P20D0

Exhaust Aftertreatment Fuel Injector A Stuck Closed

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Generic OBD-II
P20D1

Exhaust Aftertreatment Fuel Injector B Control Circuit/Open

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Generic OBD-II
P20D2

Exhaust Aftertreatment Fuel Injector B Control Performance

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Generic OBD-II
P20D3

Exhaust Aftertreatment Fuel Injector B Control Circuit Low

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Generic OBD-II
P20D4

Exhaust Aftertreatment Fuel Injector B Control Circuit High

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Generic OBD-II
P20D5

Exhaust Aftertreatment Fuel Injector B Stuck Open

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Generic OBD-II
P20D6

Exhaust Aftertreatment Fuel Injector B Stuck Closed

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Generic OBD-II
P20D7

Exhaust Aftertreatment Fuel Supply Control Circuit/Open

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Generic OBD-II
P20D8

Exhaust Aftertreatment Fuel Supply Control Performance

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Generic OBD-II
P20D9

Exhaust Aftertreatment Fuel Supply Control Circuit Low

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Generic OBD-II
P20DA

Exhaust Aftertreatment Fuel Supply Control Circuit High

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Generic OBD-II
P20DB

Exhaust Aftertreatment Fuel Supply Control Stuck Open

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Generic OBD-II
P20DC

Exhaust Aftertreatment Fuel Supply Control Stuck Closed

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Generic OBD-II
P20DD

Exhaust Aftertreatment Fuel Pressure Sensor Circuit

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Generic OBD-II
P20DE

Exhaust Aftertreatment Fuel Pressure Sensor Circuit Range/Performance

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Generic OBD-II
P20DF

Exhaust Aftertreatment Fuel Pressure Sensor Circuit Low

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Generic OBD-II
P20E0

Exhaust Aftertreatment Fuel Pressure Sensor Circuit High

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Generic OBD-II
P20E1

Exhaust Aftertreatment Fuel Pressure Sensor Circuit Intermittent/Erratic

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Generic OBD-II
P20E2

Exhaust Gas Temperature Sensor 1/2 Correlation Bank 1

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Generic OBD-II
P20E3

Exhaust Gas Temperature Sensor 1/3 Correlation Bank 1

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Generic OBD-II
P20E4

Exhaust Gas Temperature Sensor 2/3 Correlation Bank 1

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Generic OBD-II
P20E5

Exhaust Gas Temperature Sensor 1/2 Correlation Bank 2

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Generic OBD-II
P20E6

Reductant Injection Air Pressure Too Low

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Generic OBD-II
P20E7

Reductant Injection Air Pressure Too High

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Generic OBD-II
P20E8

Reductant Pressure Too Low

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Generic OBD-II
P20E9

Reductant Pressure Too High

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Generic OBD-II
P20EA

Reductant Control Module Power Relay De-Energized Performance - Too Early

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Generic OBD-II
P20EB

Reductant Control Module Power Relay De-Energized Performance - Too Late

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Generic OBD-II
P20EC

SCR NOx Catalyst - Over Temperature Bank 1

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Generic OBD-II
P20ED

SCR NOx Pre-Catalyst - Over Temperature Bank 1

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Generic OBD-II
P20EE

SCR NOx Catalyst Efficiency Below Threshold Bank 1 Catalyst 1

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Generic OBD-II
P20EF

SCR NOx Pre- Catalyst Efficiency Below Threshold Bank 1

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Generic OBD-II
P20F0

SCR NOx Catalyst - Over Temperature Bank 2

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Generic OBD-II
P20F1

SCR NOx Pre-Catalyst - Over Temperature Bank 2

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Generic OBD-II
P20F2

SCR NOx Catalyst Efficiency Below Threshold Bank 2

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Generic OBD-II
P20F3

SCR NOx Pre- Catalyst Efficiency Below Threshold Bank 2

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Generic OBD-II
P20F4

Reductant Consumption Too Low

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Generic OBD-II
P20F5

Reductant Consumption Too High

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Generic OBD-II
P20F6

Reductant Injection Valve Stuck Open Bank 1 Unit 1

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Generic OBD-II
P20F7

Reductant Injection Valve Stuck Open Bank 2 Unit 1

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Generic OBD-II
P20F8

Intake Manifold Runner Control Circuit Performance Bank 1

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Generic OBD-II
P20F9

Intake Manifold Runner Control Circuit Performance Bank 2

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Generic OBD-II
P20FA

Reductant Pump B Control Circuit/Open

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Generic OBD-II
P20FB

Reductant Pump B Control Performance/Stuck Off

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Generic OBD-II
P20FC

Reductant Pump B Control Circuit Low

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Generic OBD-II
P20FD

Reductant Pump B Control Circuit High

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Generic OBD-II
P20FE

Reductant Metering Unit 1 Performance

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Generic OBD-II
P20FF

Reductant Control Module Performance

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Generic OBD-II
P2100

Throttle Actuator A Control Motor Circuit/Open

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Generic OBD-II
P2101

Throttle Actuator A Control Motor Circuit Range/Performance

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Generic OBD-II
P2102

Throttle Actuator A Control Motor Circuit Low

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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.