Diagnostic comparisons

Compare OBD codes and concepts

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 954 · 28591–28620 shown

Enhanced PID

Cooling Fan Duty

Mitsubishi · % · 4 profiles

Enhanced PID

Cooling Fan Duty Cycle

Mazda · % · 2 profiles

Enhanced PID

Cooling Fan High

Nissan · No scalar unit · 21 profiles

Enhanced PID

Cooling Fan High

Infiniti · No scalar unit · 1 profiles

Enhanced PID

Cooling Fan Low

Nissan · No scalar unit · 21 profiles

Enhanced PID

Cooling Fan Low

Infiniti · No scalar unit · 1 profiles

Enhanced PID

Cooling Fan Mode 1

Toyota · No scalar unit · 2 profiles

Enhanced PID

Cooling Fan Relay Status

Toyota · No scalar unit · 2 profiles

Enhanced PID

Cooling fan – high speed

Honda · No scalar unit · 1 profiles

Enhanced PID

Cooling fan – low speed

Honda · No scalar unit · 1 profiles

Enhanced PID

Corrected Timing advanceance

Mitsubishi · ° · 1 profiles

Enhanced PID

Corrected absolute manifold pressure

Land Rover · kPa · 1 profiles

Enhanced PID

Counter: detected

Proton · No scalar unit · 1 profiles

Enhanced PID

Counter: detected Cat. Damaging misfire cyl.1

Proton · No scalar unit · 1 profiles

Enhanced PID

Counter: detected Cat. Damaging misfire cyl.2

Proton · No scalar unit · 1 profiles

Enhanced PID

Counter: detected Cat. Damaging misfire cyl.3

Proton · No scalar unit · 1 profiles

Enhanced PID

Counter: detected Cat. Damaging misfire cyl.4

Proton · No scalar unit · 1 profiles

Enhanced PID

Coverage driven length

Kia · km · 1 profiles

Enhanced PID

Coverage driven length

Hyundai · km · 3 profiles

Enhanced PID

Toyota · ° · 1 profiles

Enhanced PID

Crank Pulse Missed

Chevrolet · No scalar unit · 1 profiles

Enhanced PID

Crankcase Pressure

Dodge · psi · 1 profiles

Enhanced PID

Crankcase Pressure Measured

Ford · kPa · 1 profiles

Enhanced PID

Crankshaft Sensor Errors

Delphi · No scalar unit · 1 profiles

Enhanced PID

Crankshaft Timing Loss Counter

Nissan · No scalar unit · 1 profiles

Enhanced PID

Crankshaft Torque

Ford · N·m · 2 profiles

Enhanced PID

Crankshaft angle sensor

Mitsubishi · rpm · 2 profiles

Enhanced PID

Crankshaft revolution counter

Proton · No scalar unit · 2 profiles

Enhanced PID

Crankshaft signal

Mitsubishi · No scalar unit · 2 profiles

Enhanced PID

Crankshaft speed

Nissan · No scalar unit · 1 profiles

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