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 681 · 20401–20430 shown

P179B

CAN ECM / TURBOCHARGER BOOST CONTROL "A" ACTUATOR CIRCUIT - INVALID DATA RECEIVED

1 reference families · Ford

P17C000

DCT без EOL

1 reference families · Genesis / Hyundai / Kia

P17D4

Transfer case control - Neutral range signal input with transfer case in 4WD-Low or 4WD-High

1 reference families · ISUZU

P1800

Transmission Clutch Interlock Safety Switch Circuit Failure

9 reference families · Ford, GM, Genesis / Hyundai / Kia, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P1801

Transmission Clutch Interlock Safety Switch Open Circuit

8 reference families · Ford, GM, Genesis / Hyundai / Kia, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P1802

Transmission Clutch Interlock Safety Switch Short Circuit To Battery

6 reference families · Ford, Genesis / Hyundai / Kia, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton

P1803

Transmission Clutch Interlock Safety Switch Short Circuit To Ground

6 reference families · Ford, Genesis / Hyundai / Kia, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton

P1804

Transmission 4-Wheel Drive High Indicator Circuit Failure

11 reference families · Chrysler, Ford, GM, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P1805

Transmission 4-Wheel Drive High Indicator Open Circuit

7 reference families · Ford, Genesis / Hyundai / Kia, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, GAC / Lexus / Toyota

P1806

Transmission 4-Wheel Drive High Indicator Short Circuit To Battery

9 reference families · Chrysler, Ford, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton

P1807

Transmission 4-Wheel Drive High Indicator Short Circuit To Ground

5 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton

P1808

Transmission 4-Wheel Drive Low Indicator Circuit Failure

9 reference families · Chrysler, Ford, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton

P1809

Transmission 4-Wheel Drive Low Indicator Open Circuit

5 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton

P1810

TFP Valve Position Switch Circuit/ Transmission 4-Wheel Drive Low Indicator Short Circuit To Battery

12 reference families · Chrysler, Ford, GM, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P1811

Transmission 4-Wheel Drive Low Indicator Short Circuit To Ground

7 reference families · Ford, GM, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P1812

Transmission 4-Wheel Drive Mode Select Circuit Failure

11 reference families · Chrysler, Ford, GM, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P1813

Transmission 4-Wheel Drive Mode Select Open Circuit

9 reference families · Ford, GM, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Porsche, Belgee / Geely / Proton, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1814

Transmission 4-Wheel Drive Mode Select Short Circuit To Battery

8 reference families · Ford, GM, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1815

Transmission 4-Wheel Drive Mode Select Short Circuit To Ground

12 reference families · Chrysler, Ford, GM, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1816

Transmission Neutral Safety Switch Circuit Failure

7 reference families · Ford, GM, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P1817

Transmission Neutral Safety Switch Open Circuit

8 reference families · Ford, GM, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Subaru, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P1818

Transmission Neutral Safety Switch Short Circuit To Battery

9 reference families · Ford, GM, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Porsche, Belgee / Geely / Proton, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1819

Transmission Neutral Safety Switch Short C+E16173:E16254ircuit To Ground

P181F

CLUTCH CONTROL SYSTEM PERFORMANCE

1 reference families · Ford

P1820

Transmission Transfer Case Clockwise Shift Relay Coil Circuit Failure

14 reference families · Chrysler, Ford, GM, Genesis / Hyundai / Kia, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, GAC / Lexus / Toyota, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1821

Transmission Transfer Case Clockwise Shift Relay Coil Open Circuit

7 reference families · Ford, GM, Genesis / Hyundai / Kia, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton

P1822

Transmission Transfer Case Clockwise Shift Relay Coil Short Circuit To Battery

12 reference families · Chrysler, Ford, GM, Genesis / Hyundai / Kia, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P1823

Transmission Transfer Case Clockwise Shift Relay Coil Short Circuit To Ground

10 reference families · Ford, GM, Genesis / Hyundai / Kia, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Porsche, Belgee / Geely / Proton, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1824

Transmission 4-Wheel Drive Clutch Relay Circuit Failure

13 reference families · Chrysler, Ford, GM, Genesis / Hyundai / Kia, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1825

Transmission 4-Wheel Drive Clutch Relay Open Circuit

10 reference families · Ford, GM, Genesis / Hyundai / Kia, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, 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