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Powertrain code references — Page 12.

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

9,891 code references in powertrain

Generic OBD-II
P0450

EVAP System Pressure Sensor/Switch A Circuit

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Generic OBD-II
P0451

EVAP System Pressure Sensor/Switch A Circuit Range/Performance

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Generic OBD-II
P0452

EVAP System Pressure Sensor/Switch A Circuit Low

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Generic OBD-II
P0453

EVAP System Pressure Sensor/Switch A Circuit High

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Generic OBD-II
P0454

EVAP System Pressure Sensor/Switch A Circuit Intermittent

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Generic OBD-II
P0455

EVAP System Leak Detected - Large Leak

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Generic OBD-II
P0456

EVAP System Leak Detected (very small leak)

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Generic OBD-II
P0457

EVAP System Leak Detected (fuel cap loose/off)

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Generic OBD-II
P0458

EVAP System Purge Control Valve A Circuit Low

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Generic OBD-II
P0459

EVAP System Purge Control Valve A Circuit High

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Generic OBD-II
P045A

EGR B Control Circuit

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Generic OBD-II
P045B

EGR B Control Circuit Range/Performance

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Generic OBD-II
P045C

EGR B Control Circuit Low

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Generic OBD-II
P045D

EGR B Control Circuit High

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Generic OBD-II
P045E

EGR B Control Stuck Open

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Generic OBD-II
P045F

EGR B Control Stuck Closed

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Generic OBD-II
P0460

Fuel Level Sensor A Circuit

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Generic OBD-II
P0461

Fuel Level Sensor A Circuit Range/Performance

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Generic OBD-II
P0462

Fuel Level Sensor A Circuit Low

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Generic OBD-II
P0463

Fuel Level Sensor A Circuit High

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Generic OBD-II
P0464

Fuel Level Sensor A Circuit Intermittent

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Generic OBD-II
P0465

EVAP Purge Flow Sensor Circuit

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Generic OBD-II
P0466

EVAP Purge Flow Sensor Circuit Range/Performance

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Generic OBD-II
P0467

EVAP Purge Flow Sensor Circuit Low

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Generic OBD-II
P0468

EVAP Purge Flow Sensor Circuit High

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Generic OBD-II
P0469

EVAP Purge Flow Sensor Circuit Intermittent

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Generic OBD-II
P046A

Catalyst Temperature Sensor 1/2 Correlation Bank 1

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Generic OBD-II
P046B

Catalyst Temperature Sensor 1/2 Correlation Bank 2

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Generic OBD-II
P046C

EGR Sensor A Circuit Range/Performance

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Generic OBD-II
P046D

EGR Sensor A Circuit Intermittent/Erratic

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Generic OBD-II
P046E

EGR Sensor B Circuit Range/Performance

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Generic OBD-II
P046F

EGR Sensor B Circuit Intermittent/Erratic

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Generic OBD-II
P0470

Exhaust Pressure Sensor A Circuit

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Generic OBD-II
P0471

Exhaust Pressure Sensor A Circuit Range/Performance

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Generic OBD-II
P0472

Exhaust Pressure Sensor A Circuit Low

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Generic OBD-II
P0473

Exhaust Pressure Sensor A Circuit High

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Generic OBD-II
P0474

Exhaust Pressure Sensor A Circuit Intermittent/Erratic

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Generic OBD-II
P0475

Exhaust Pressure Control Valve A

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Generic OBD-II
P0476

Exhaust Pressure Control Valve A Range/Performance

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Generic OBD-II
P0477

Exhaust Pressure Control Valve A Low

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Generic OBD-II
P0478

Exhaust Pressure Control Valve A High

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Generic OBD-II
P0479

Exhaust Pressure Control Valve A Intermittent

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Generic OBD-II
P047A

Exhaust Pressure Sensor B Circuit

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Generic OBD-II
P047B

Exhaust Pressure Sensor B Circuit Range/Performance

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Generic OBD-II
P047C

Exhaust Pressure Sensor B Circuit Low

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Generic OBD-II
P047D

Exhaust Pressure Sensor B Circuit High

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Generic OBD-II
P047E

Exhaust Pressure Sensor B Circuit Intermittent/Erratic

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Generic OBD-II
P047F

Exhaust Pressure Control Valve A Stuck Open

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Generic OBD-II
P0480

Fan 1 Control Circuit

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Generic OBD-II
P0481

Fan 2 Control Circuit

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Generic OBD-II
P0482

Fan 3 Control Circuit

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Generic OBD-II
P0483

Fan Rationality Check

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Generic OBD-II
P0484

Fan Circuit Current High

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Generic OBD-II
P0485

Fan Power/Ground Circuit

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Generic OBD-II
P0486

EGR Sensor B Circuit

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Generic OBD-II
P0487

EGR Throttle Control Circuit A /Open

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Generic OBD-II
P0488

EGR Throttle Control Circuit A Range/Performance

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Generic OBD-II
P0489

EGR A Control Circuit Low

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Generic OBD-II
P048A

Exhaust Pressure Control Valve A Stuck Closed

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Generic OBD-II
P048B

Exhaust Pressure Control Valve A Position Sensor/Switch Circuit

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Generic OBD-II
P048C

Exhaust Pressure Control Valve A Position Sensor/Switch Circuit Range/Performance

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Generic OBD-II
P048D

Exhaust Pressure Control Valve A Position Sensor/Switch Circuit Low

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Generic OBD-II
P048E

Exhaust Pressure Control Valve A Position Sensor/Switch Circuit High

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Generic OBD-II
P048F

Exhaust Pressure Control Valve A Position Sensor/Switch Circuit Intermittent/Erratic

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Generic OBD-II
P0490

EGR A Control Circuit High

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Generic OBD-II
P0491

AIR System Insufficient Flow Bank 1

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Generic OBD-II
P0492

AIR System Insufficient Flow Bank 2

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Generic OBD-II
P0493

Fan Overspeed

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Generic OBD-II
P0494

Fan 1 Underspeed

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Generic OBD-II
P0495

Fan 1 Overspeed

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Generic OBD-II
P0496

EVAP System High Purge Flow

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Generic OBD-II
P0497

EVAP System Low Purge Flow

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Generic OBD-II
P0498

EVAP System Vent Valve Control Circuit Low

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Generic OBD-II
P0499

EVAP System Vent Valve Control Circuit High

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Generic OBD-II
P049A

EGR B Flow

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Generic OBD-II
P049B

EGR B Flow Insufficient Detected

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Generic OBD-II
P049C

EGR B Flow Excessive Detected

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Generic OBD-II
P049D

EGR A Control Position Exceeded Learning Limit

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Generic OBD-II
P049E

EGR B Control Position Exceeded Learning Limit

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Generic OBD-II
P049F

Exhaust Pressure Control Valve B

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Generic OBD-II
P04A0

Exhaust Pressure Control Valve B Range/Performance

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Generic OBD-II
P04A1

Exhaust Pressure Control Valve B Low

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Generic OBD-II
P04A2

Exhaust Pressure Control Valve B High

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Generic OBD-II
P04A3

Exhaust Pressure Control Valve B Intermittent

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Generic OBD-II
P04A4

Exhaust Pressure Control Valve B Stuck Open

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Generic OBD-II
P04A5

Exhaust Pressure Control Valve B Stuck Closed

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Generic OBD-II
P04A6

Exhaust Pressure Control Valve B Position Sensor/Switch Circuit

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Generic OBD-II
P04A7

Exhaust Pressure Control Valve B Position Sensor/Switch Circuit Range/Performance

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Generic OBD-II
P04A8

Exhaust Pressure Control Valve B Position Sensor/Switch Circuit Low

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Generic OBD-II
P04A9

Exhaust Pressure Control Valve B Position Sensor/Switch Circuit High

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Generic OBD-II
P04AA

Exhaust Pressure Control Valve B Position Sensor/Switch Circuit Intermittent/Erratic

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Generic OBD-II
P04AB

EVAP System Purge Control Valve B Circuit/Open

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Generic OBD-II
P04AC

EVAP System Purge Control Valve B Circuit Low

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Generic OBD-II
P04AD

EVAP System Purge Control Valve B Circuit High

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Generic OBD-II
P04AE

EVAP System Purge Control Valve B Performance/Stuck Open

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Generic OBD-II
P04AF

EVAP System Purge Control Valve B Stuck Closed

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Generic OBD-II
P04B0

Refueling Vapor Control Valve Circuit/Open

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Generic OBD-II
P04B1

Refueling Vapor Control Valve Circuit Low

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Generic OBD-II
P04B2

Refueling Vapor Control Valve Circuit High

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Generic OBD-II
P04B3

Refueling Vapor Control Valve Stuck Performance/Stuck 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.