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Powertrain code references — Page 50.

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

9,891 code references in powertrain

Buick / Cadillac +7
P1415

Secondary Air Injection (AIR) System

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Mazda
P1415

Air Pump Circuit

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Buick / Cadillac +7
P1416

AIR System Bank 1

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Mazda
P1416

Port Air Circuit

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Mazda
P1417

Port Air Relief Circuit

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Volkswagen
P1417

Fuel Level Sensor Signal Too Low

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Buick / Cadillac +7
P1418

Secondary Air Injection System Relay A Control Circuit High

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Mazda
P1418

Split Air 1 Circuit

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Volkswagen
P1418

Fuel Level Sensor Signal Too High

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Mazda
P1419

Split Air 2 Circuit

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BMW
P1420

Secondary Air Valve Control Circuit Electrical

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Buick / Cadillac +7
P1420

Intake Air Low Pressure Switch Circuit Low Voltage

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Subaru
P1420

Fuel Tank Pressure Control Solenoid High Input

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Volkswagen
P1420

Secondary Air Injection Control Module Electrical Malfunction

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BMW
P1421

Secondary Air System Bank 1

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Buick / Cadillac +7
P1421

Intake Air Low Pressure Switch Circuit High Voltage

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Subaru
P1421

Exhaust Gas Recirculation Circuit High Input

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Volkswagen
P1421

Secondary Air Injection Valve Circuit Short To Ground

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BMW
P1422

Secondary Air System Bank 2

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Subaru
P1422

EVAP Purge Control Solenoid Valve Circuit High Input

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Volkswagen
P1422

Secondary Air Injection Valve Circuit Short To B+

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Buick / Cadillac +7
P1423

Intake Air High Pressure Switch Circuit High Voltage

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Subaru
P1423

EVAP Vent Control High Input

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Volkswagen
P1423

Secondary Air Injection System Bank 1 Flow Too Low

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Volkswagen
P1424

Secondary Air Injection System Bank 1 Leak Detected

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Kia
P1425

EVAP Purge Control Solenoid Circuit Low Voltage

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Volkswagen
P1425

Tank Ventilation Valve Short To Ground

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Volkswagen
P1426

Tank Ventilation Valve Open Circuit

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Buick / Cadillac +7
P1431

Fuel Level Sensor 2 Performance

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Ford / Lincoln +1
P1431

Misfire Monitor Disabled Unable to Learn Trigger Wheel Profile

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BMW
P1432

Secondary Air Injection System Incorrect Flow Detected

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Buick / Cadillac +7
P1432

Fuel Level Sensor 2 Circuit Low Voltage

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Volkswagen
P1432

Secondary Air Injection Valve Open

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Buick / Cadillac +7
P1433

Fuel Level Sensor 2 Circuit High Voltage

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Volkswagen
P1433

Secondary Air Injection Pump Relay Circuit Open

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Volkswagen
P1434

Secondary Air Injection Pump Relay Circuit Short To B+

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Volkswagen
P1435

Secondary Air Injection Pump Relay Circuit Short To Ground

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Volkswagen
P1436

Secondary Air Injection Pump Relay Circuit Electrical Malfunction

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BMW
P1438

Purge Control Valve Control Open Circuit

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BMW
P1439

Purge Control Valve Control Circuit Signal Low

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Mazda
P1439

Floor Temp Switch Circuit

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Volkswagen
P1439

EGR Valve Position Sensor Adaptation At Limit

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BMW
P1440

Purge Control Valve Control Circuit Signal High

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Jaguar
P1440

Purge Valve Stuck Open

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Nissan
P1440

EVAP Control System Small Leak

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Subaru
P1440

Fuel Tank Pressure Control System Low Input

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Volkswagen
P1440

EGR Valve Power Stage Open

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BMW
P1441

Leakage Diagnostic Pump Control Open Circuit

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Buick / Cadillac +7
P1441

Evaporative Emission (EVAP) System Flow During Non-Purge

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Jaguar
P1441

ELC System 1

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Nissan
P1441

Vacuum Cut Valve Bypass Valve

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Subaru
P1441

Fuel Tank Pressure Control System High Input

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Volkswagen
P1441

EGR Valve Circuit Open Short To Ground

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BMW
P1442

Leakage Diagnostic Pump Control Circuit Signal Low

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Buick / Cadillac +7
P1442

EVAP Vacuum Switch High Voltage During Ignition On

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Ford / Lincoln +1
P1442

Secondary Air Injection System Monitor Circuit High Voltage

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Subaru
P1442

Fuel Level Sensor Circuit Range Performance

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Volkswagen
P1442

EGR Valve Position Sensor Signal Too High

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BMW
P1443

Leakage Diagnostic Pump Control Circuit Signal High

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Ford / Lincoln +1
P1443

Evaporative Emission Control System Vacuum System Purge Control Solenoid or Purge Control Valve Fault

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Mazda
P1443

EVAP System Purge Flow Fault

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Mitsubishi
P1443

EVAP Purge Control Solenoid 2 Circuit Fault

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Nissan
P1443

EVAP Canister Control Vacuum Switch Circuit Fault

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Subaru
P1443

EVAP Control System Vent Control Function Problem

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Volkswagen
P1443

EGR Valve Position Sensor Signal Too Low

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BMW
P1444

Diagnostic Module Tank Leakage DM-TL Pump Control Open Circuit

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Ford / Lincoln +1
P1444

Purge Flow Sensor Circuit Input Low

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Mazda
P1444

EVAP Purge Flow Sensor Circuit Low Voltage

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Nissan
P1444

Canister Purge Volume Control Solenoid Valve

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Volkswagen
P1444

EGR Valve Position Sensor Range Performance

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BMW
P1445

Diagnostic Module Tank Leakage DM-TL Pump Control Circuit Signal Low

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Ford / Lincoln +1
P1445

Purge Flow Sensor Circuit Input High

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Mazda
P1445

EVAP Purge Flow Sensor Circuit High Voltage

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Nissan
P1445

EVAP Canister Purge Volume Control Valve

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Volkswagen
P1445

Catalyst Temperature Sensor 2 Circuit Range Performance

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BMW
P1446

Diagnostic Module Tank Leakage DM-TL Pump Control Circuit Signal High

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Mazda
P1446

Evaporative Vacuum Solenoid Circuit

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Nissan
P1446

EVAP Canister Vent Control Valve Closed

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Volkswagen
P1446

Catalyst Temperature Circuit Short To Ground

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BMW
P1447

Diagnostic Module Tank Leakage DM-TL Pump Too High During Switching

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Jaguar
P1447

ELC System Closure Valve Flow

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Nissan
P1447

EVAP Control System Purge Flow Monitoring

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Volkswagen
P1447

Catalyst Temperature Circuit Open Short To B+

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BMW
P1448

Diagnostic Module Tank Leakage DM-TL Pump Too Low During Switching

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Jaguar
P1448

ELC System 2

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Nissan
P1448

EVAP Canister Vent Control Valve Open

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Volkswagen
P1448

Catalyst Temperature Sensor 2 Circuit Short To Ground

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BMW
P1449

Diagnostic Module Tank Leakage DM-TL Pump Too High

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Kia
P1449

Canister Drain Cut Valve Open Or Short 1.8L

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Mazda
P1449

Evaporative Check Solenoid Circuit

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Volkswagen
P1449

Catalyst Temperature Sensor 2 Circuit Open Short To B+

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BMW
P1450

Diagnostic Module Tank Leakage DM-TL Switching Solenoid Open Circuit

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Buick / Cadillac +7
P1450

Barometric Pressure Sensor Circuit

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Ford / Lincoln +1
P1450

Inability of Evaporative Emission Control System to Bleed Fuel Tank

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Geo
P1450

Barometric Pressure Sensor Circuit Fault

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Kia
P1450

Excessive Vacuum Leak

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Mazda
P1450

Unable To Bleed Up Fuel Tank Vacuum

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Suzuki
P1450

Barometric Pressure Sensor Too Low Or Too High

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Volkswagen
P1450

Secondary Air Injection System Circuit Short To B+

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BMW
P1451

Diagnostic Module Tank Leakage DM-TL Switching Solenoid Control Circuit Signal 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.