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Diagnostic comparisons

Compare OBD codes and concepts

P0420 vs P0430

Upstream vs downstream O2 sensor

Bank 1 vs Bank 2

OBD1 vs OBD2: scope

Diagnostic knowledge search

23,879 code identifiers with scoped meanings, and 54,261 enhanced signal definitions. No VIN or personal information is needed.

Diagnostic explainers

Pending, stored and permanent codes · Enhanced PIDs and Mode 22

23,879 matches

Page 658 · 19711–19740 shown
P1401
DPFE Circuit High Input

19 reference families · BMW, Chrysler, Ford, Genesis / Hyundai / Kia, Jaguar / Land Rover, Lambo, Lincoln, Mazda, Mercedes-Benz, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1402
EGR Metering Orifice Restricted

18 reference families · BMW, Chrysler, Dodge / Fiat, Ford, Genesis / Hyundai / Kia, ISUZU, Lincoln, Mazda, Mercedes-Benz, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1403
DPFE Sensor Hoses Reversed

17 reference families · BMW, Chrysler, Dodge / Fiat, Ford, GM, Genesis / Hyundai / Kia, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Plymouth, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1404
IAT - B Circuit Malfunction/ Exhaust Gas Recirculation Closed Position Performance

18 reference families · BMW, Chrysler, Dodge / Fiat, Ford, GM, Genesis / Hyundai / Kia, Lincoln, Mercedes-Benz, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Dacia / Renault, Chevrolet / Citroen / General Motors / Opel / Peugeot, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1405
DPFE Sensor Upstream Hose Off Or Plugged

18 reference families · BMW, Chrysler, Ford, GM, Genesis / Hyundai / Kia, Jaguar / Land Rover, Lincoln, Mazda, Mercedes-Benz, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P1406
EGR Valve Pintle Position Circuit

17 reference families · BMW, Chrysler, Ford, GM, Lincoln, Mazda, Mercedes-Benz, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1407
EGR No Flow Detected

16 reference families · Chrysler, Ford, GM, ISUZU, Lincoln, Mazda, Mercedes-Benz, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1408
EGR Flow Out Of Self Test Range

19 reference families · Chrysler, Dodge / Fiat, Ford, GM, Genesis / Hyundai / Kia, Jaguar / Land Rover, Lincoln, Mazda, Mercedes-Benz, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Suzuki, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1409
EVR Control Circuit Malfunction

17 reference families · Chrysler, Ford, GM, Genesis / Hyundai / Kia, Jaguar / Land Rover, Lincoln, Mazda, Mercedes-Benz, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1410
EGR Barometric Pressure Sensor VREF Voltage

16 reference families · Chrysler, Ford, GM, Acura / Honda, Jaguar / Land Rover, Datsun / Lada, Lambo, Lincoln, Mazda, Mercury, Oldsmobile, Saab, Suzuki, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1411
SAI System Incorrect Downstream Flow Detected

14 reference families · Chrysler, Ford, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Porsche, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1413
SAI System Monitor Circuit Low Input

14 reference families · BMW, Chrysler, Ford, Lambo, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1414
SAI System Monitor Circuit High Input

13 reference families · BMW, Chrysler, Ford, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1415
Air Pump Circuit Malfunction/ (AIR) System Bank 1

14 reference families · Chrysler, Ford, GM, Acura / Honda, Genesis / Hyundai / Kia, Mazda, Mercedes-Benz, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P1416
Port Air Circuit Malfunction/ (AIR) System Bank 2

14 reference families · Chrysler, Ford, GM, Acura / Honda, Genesis / Hyundai / Kia, Mazda, Mercedes-Benz, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P1417
Port Air Relief Circuit Malfunction

11 reference families · Chrysler, Ford, Mazda, Mercedes-Benz, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1418
Split Air #1 Circuit Malfunction

13 reference families · Chrysler, Ford, GM, Genesis / Hyundai / Kia, Mazda, Mercedes-Benz, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1419
Split Air #2 Circuit Malfunction

9 reference families · Ford, Genesis / Hyundai / Kia, Mazda, Mercedes-Benz, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot

P1420
Catalyst Temperature Sensor Failure

15 reference families · BMW, Chrysler, Ford, GM, Acura / Honda, Mercedes-Benz, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Subaru, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1421
Catalyst Damage

12 reference families · BMW, Dodge / Fiat, Ford, GM, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Subaru, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1422
EGI Temperature Sensor Failure

11 reference families · BMW, Ford, GM, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Subaru, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1423
EGI Functionality Test Failed

11 reference families · BMW, Ford, GM, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Subaru, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

OBD Lens reference library · catalog legacy-owner-2026-11-02-v84-evidence. Sources and scope