Diagnostic comparisons

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

Code or signal meaning

Reference

Brand context

78,140 matches

Page 525 · 15721–15750 shown

C183786

Ошибка сигнала CAN BCA/BCW

1 reference families · Genesis / Hyundai / Kia

C1838

Charging System Fault

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1839

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C184

Lost Communication With Radio

1 reference families · BMW

C1840

Air Suspension Disable Switch Circuit Failure

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1841

Air Suspension Disable Switch Circuit Open

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1842

Air Suspension Disable Switch Circuit Short To Battery

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1843

Air Suspension Disable Switch Circuit Short To Ground

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1844

Air Suspension Secondary Front Inflator Solenoid Output Circuit Failure

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1845

Air Suspension Front Inflator Solenoid Output Circuit Failure

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1846

Air Suspension Front Inflator Solenoid Output Circuit Open

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1847

Air Suspension Front Inflator Solenoid Output Circuit Short To Battery

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1848

Air Suspension Front Inflator Solenoid Output Circuit Short To Ground

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1849

Master Cylinder Pressure Out of Range

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C185

Lost Communication With Antenna Control Module

1 reference families · BMW

C1850

Air Suspension Warning Lamp Circuit Failure

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1851

Air Suspension Warning Lamp Circuit Open

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1852

Air Suspension Warning Lamp Circuit Short To Battery

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1853

Air Suspension Warning Lamp Circuit Short To Ground

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1854

Motor Temperature Out of Range

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1855

Acceleration Position Sensor Conflict

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1856

Traction Motor Encoder circuit Failure

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1859

PRNDL Input #2 Circuit Failure

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C186

Lost Communication With Audio Amplifier

1 reference families · BMW

C1860

PRNDL Input #3 Circuit Failure

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1861

PRNDL Input #4 Circuit Failure

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C1862

Contactor Circuit Failure

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C186286

Неверный сигнал SCC

1 reference families · Genesis / Hyundai / Kia

C1863

External Charging Fault

4 reference families · Ford, Dodge / Mitsubishi, Infiniti / Nissan, Belgee / Geely / Proton

C186387

Истечение времени ожидания CAN системы навигации для HDA

1 reference families · Genesis / Hyundai / Kia

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