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

78,140 matches

Page 657 · 19681–19710 shown

P1377

IC Module CAM Pulse To 4X Reference Pulse Comparison; IC Cam Pulse To 4X Reference Pulse

3 reference families · GM, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1378

ECM Bank 2 Knock Control Self-Test Malfunction

4 reference families · BMW, Ford, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1379

ECM Bank 2 Knock Control Self-Test Malfunction

2 reference families · BMW, Ford

P1380

Misfire Detected - Rough Road Data Not Available

15 reference families · BMW, Chrysler, Ford, GM, Jaguar / Land Rover, Lincoln, 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

P138023

Intake air temperature sensor 2 cold start calibration is unreasonable (negative deviation)

1 reference families · Changan

P138024

Intake air temperature sensor 2 cold start calibration is unreasonable (positive deviation)

1 reference families · Changan

P1381

Variable Cam Timing Overadvanced (Bank #1)/ Misfire Detected - No Communication with BCM

15 reference families · BMW, Chrysler, Ford, GM, Acura / Honda, Jaguar / Land Rover, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P1382

Variable Cam Timing Solenoid #1 Circuit Malfunction

11 reference families · BMW, Ford, GM, Acura / Honda, Mazda, Mercedes-Benz, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot

P1383

Variable Cam Timing Overretarded (Bank #1)

12 reference families · BMW, Chrysler, Ford, Jaguar / Land Rover, Lincoln, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot

P1384

VVT Solenoid A Malfunction

12 reference families · BMW, Chrysler, Ford, Genesis / Hyundai / Kia, Jaguar / Land Rover, Mercedes-Benz, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Porsche, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot

P1385

Variable Cam Timing Solenoid B Malfunction

15 reference families · BMW, Chrysler, Ford, Jaguar / Land Rover, Lincoln, Mercedes-Benz, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Porsche, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Audi / Jetta / MAN / Seat / Skoda / Volkswagen

P1386

Variable Cam Timing Overadvanced (Bank #2)

18 reference families · BMW, Chrysler, Ford, Jaguar / Land Rover, Datsun / Lada, Lambo, Lincoln, Mercedes-Benz, Mercury, Dodge / Mitsubishi, Infiniti / Nissan, Generic OBD2, Oldsmobile, Porsche, Belgee / Geely / Proton, Chevrolet / Citroen / General Motors / Opel / Peugeot, Audi / Jetta / MAN / Seat / Skoda / Volkswagen, Polestar / Volvo

P1387

Variable Cam Timing Solenoid #2 Circuit Malfunction

10 reference families · 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

P1388

Variable Cam Timing Overretarded (Bank #2)

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

P138823

The cold start calibration of ambient temperature sensor is unreasonable (negative deviation)

1 reference families · Changan

P138824

The cold start calibration of ambient temperature sensor is unreasonable (positive deviation)

1 reference families · Changan

P1389

Glow Plug Circuit High Side Low Input

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

P138B

GLOW PLUG CONTROL MODULE SYSTEM VOLTAGE

1 reference families · Ford

P138D

TURBOCHARGER / SUPERCHARGER BOOST CONTROL "A" TEMPERATURE TOO HIGH

1 reference families · Ford

P1390

Octane Adjust Pin Out Of Self Test Range

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

P1391

Glow Plug Circuit Low Input (Bank #1)

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

P1392

Glow Plug Circuit High Input (Bank #1)

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

P1393

Glow Plug Circuit Low Input (Bank #2)

P1394

Glow Plug Circuit High Input (Bank #2)

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

P1395

Glow Plug Monitor Fault (Bank #1)

13 reference families · Chrysler, Ford, GM, 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

P1396

Wheel Speed Sensor 2 - G - Sensor Circuit Performance

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

P1397

System Voltage Out Of Self Test Range

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

P1398

VVT Solenoid B Circuit High Input

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

P1399

Glow Plug Circuit High Side, High Input

14 reference families · Chrysler, Ford, GM, 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

P1400

DPFE Circuit Low Input

21 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, Dacia / Renault, Chevrolet / Citroen / General Motors / Opel / Peugeot, Subaru, 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