Diagnostic comparisons

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

Code or signal meaning

Reference

Brand context

23,879 matches

Page 672 · 20131–20160 shown

P1637

Can Link ECM/ABSCM Circuit / Network Malfunction

14 reference families · BMW, Chrysler, Ford, GM, Genesis / Hyundai / Kia, Jaguar / Land Rover, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1638

Can Link ECM/INSTM Circuit / Network Malfunction

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

P1639

Vehicle ID Block Corrupted or Not Programmed

16 reference families · BMW, Chrysler, Ford, GM, Acura / Honda, Genesis / Hyundai / Kia, 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

P163A

GENERATOR "B" CONTROL CIRCUIT

2 reference families · Ford, ISUZU

P163B

GENERATOR "B" FIELD TERMINAL CIRCUIT

2 reference families · Ford, ISUZU

P163C

GENERATOR "B" FIELD TERMINAL CIRCUIT LOW

1 reference families · Ford

P163D

GENERATOR "B" FIELD TERMINAL CIRCUIT HIGH

1 reference families · Ford

P163E

TRANSMISSION CONTROL MODULE PROGRAMMING ERROR

1 reference families · Ford

P163F

TRANSMISSION ID BLOCK CORRUPTED, NOT PROGRAMMED

1 reference families · Ford

P1640

Powertrain DTCs Available in Another Module

19 reference families · BMW, Chrysler, Ford, GM, Acura / Honda, Genesis / Hyundai / Kia, Datsun / Lada, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Porsche, Belgee / Geely / Proton, Saab, Chevrolet / Citroen / General Motors / Opel / Peugeot, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1641

Fuel Pump Primary Circuit Failure

18 reference families · Chrysler, Ford, GM, Acura / Honda, Genesis / Hyundai / Kia, Jaguar / Land Rover, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Dacia / Renault, Saab, Chevrolet / Citroen / General Motors / Opel / Peugeot, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1642

Fuel Pump Monitor Circuit High Input

18 reference families · Chrysler, Ford, GM, Acura / Honda, Genesis / Hyundai / Kia, Jaguar / Land Rover, 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

P1643

Fuel Pump Monitor Circuit Low Input

P1644

Fuel Pump Speed Control Circuit Malfunction

16 reference families · Chrysler, Ford, GM, Acura / Honda, 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

P1645

Fuel Pump Resistor Switch Circuit Malfunction

15 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, Polestar / Volvo

P1646

Hydraulic Cooling Fan Control Circuit Low; Linear 02 Sensor Control Chip (Bank 1)

8 reference families · Chrysler, Ford, GM, Acura / Honda, Genesis / Hyundai / Kia, Jaguar / Land Rover, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1647

Hydraulic Cooling Fan Control Circuit High; Linear 02 Sensor Control Chip (Bank 2)

8 reference families · Chrysler, Ford, GM, Acura / Honda, Genesis / Hyundai / Kia, Jaguar / Land Rover, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1648

Glow Plug Module Internal; Knock Sensor Input Chip

7 reference families · Chrysler, GM, Acura / Honda, Genesis / Hyundai / Kia, Jaguar / Land Rover, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1649

Glow Plug Module Power Supply Circuit

9 reference families · Chrysler, Ford, GM, ISUZU, Jaguar / Land Rover, Mazda, Mercedes-Benz, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P164A

O2 SENSOR POSITIVE CURRENT TRIM CIRCUIT PERFORMANCE (BANK 1 SENSOR 1)

1 reference families · Ford

P164B

O2 SENSOR POSITIVE CURRENT TRIM CIRCUIT PERFORMANCE (BANK 2 SENSOR 1)

1 reference families · Ford

P164D

ALL WHEEL DRIVE ID BLOCK CORRUPTED, NOT PROGRAMMED

1 reference families · Ford

P1650

PSP Switch Out of Self Test Range

17 reference families · Chrysler, Ford, GM, 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, Polestar / Volvo

P1651

PSP Switch Input Malfunction

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

P1652

IAC Monitor Disabled by PSP Switch Failed On

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

P1653

Power Steering Output Circuit Malfunction

16 reference families · Alfa Romeo, BMW, Chrysler, Dodge / Fiat, Ford, GM, Genesis / Hyundai / Kia, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Saab, Chevrolet / Citroen / General Motors / Opel / Peugeot, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1654

Recirculation Override Circuit Malfunction

15 reference families · Alfa Romeo, BMW, Chrysler, Dodge / Fiat, Ford, GM, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Saab, Chevrolet / Citroen / General Motors / Opel / Peugeot, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1655

Starter Disable Circuit Malfunction

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

P1656

J1850 Communication Bus Busy / Not Available; CAN Link PCM - PCM Circuit - Network

13 reference families · Chrysler, Ford, GM, Acura / Honda, Jaguar / Land Rover, Lincoln, Mercury, Oldsmobile, Porsche, Saab, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1657

J1850 Communication Bus Invalid IFR Received; CAN Link Chip Malfunction

11 reference families · Chrysler, Ford, GM, Jaguar / Land Rover, Lincoln, Mercury, Oldsmobile, Saab, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

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