Directory 615 Families 9,249 SAE Codes

OBD-II Fault Family Directory

How MechanicDB groups codes

Codes that share one detection mechanism and one repair path belong to a single authored fault family. Grouping 9,249 SAE trouble codes into 615 families is what makes the diagnosis tractable: you learn the mechanism once, then read off which codes it sets.

Powertrain — 537 families, 7333 codes

Network — 33 families, 1227 codes

Lost Comm Powertrain Module · 199 Software Incompatibility Module · 80 Invalid Data Powertrain Module · 79 Vehicle Comm Bus Lettered Fault · 76 Lost Comm EV Charging Module · 66 Control Module Power Ignition Input · 57 HV Interlock Circuit Fault · 56 Lost Comm Seat Door Module · 50 Invalid Data Seat Door Module · 46 Fuel Cell Stack Sensor Actuator Circuit · 46 Invalid Data EV Charging Module · 45 Lost Comm ADAS Camera Radar Module · 42 Invalid Data ADAS Camera Radar Module · 42 Lost Comm Chassis ABS Module · 32 Invalid Data Chassis ABS Module · 30 Lost Comm HVAC Module · 29 Lost Comm Infotainment Module · 27 Invalid Data Infotainment Module · 27 Lost Comm Body Module · 24 Invalid Data Body Module · 24 Lost Comm Restraints Module · 21 Invalid Data Restraints Module · 21 Lost Comm Lighting Module · 14 Invalid Data Lighting Module · 14 CAN Bus Off Fault · 13 Lost Comm Instrument Display Module · 11 Invalid Data Instrument Display Module · 11 Control Module Network Wakeup Fault · 10 HS CAN Bus Fault · 9 MS CAN Bus Fault · 9 LS CAN Bus Fault · 9 Invalid Data HVAC Module · 5 Control Module Network Authentication Fault · 3

Chassis — 35 families, 500 codes

Brake Pressure Sensor Circuit · 65 Wheel Speed Sensor Circuit · 61 AWD Transfer Case Differential Actuator Circuit · 40 Electric Brake Booster Motor Circuit · 37 ABS Pump Motor Circuit · 26 AWD Clutch Actuator Circuit · 24 Brake Pedal Position Sensor Circuit · 22 Vehicle Dynamics Sensor Circuit · 21 Variable Effort Power Steering Circuit · 20 Wheel Speed Sensor Tone Mechanical · 18 Electric Park Brake Actuator Circuit · 16 ABS Hydraulic Inlet Outlet Valve Circuit · 15 Steering Angle Sensor Circuit · 15 ECM Programming Configuration Error · 12 Brake Master Cylinder Piston Position Sensor Circuit · 12 Brake Vacuum Sensor Circuit · 11 Brake Booster Temperature Sensor Circuit · 11 Chassis Warning Indicator Switch Circuit · 8 ABS Hydraulic Pressure Response Circuit · 7 Active Air Dam Actuator Circuit · 7 Brake Booster Solenoid Circuit · 6 ABS Control Module Internal Fault · 6 Driveshaft Speed Sensor Circuit · 6 TCS Control Valve Circuit · 5 Brake Booster Pressure Travel Sensor Circuit · 5 Brake Blending Valve Circuit · 4 Brake Pedal Switch Stop Lamp Circuit · 3 Brake Fluid Level Wear Sensor Circuit · 3 TPMS Related Fault · 3 Air Brake Chamber Pressure Sensor Circuit · 3 Brake Pedal Feedback Pressure Circuit · 2 Stability Control System Fault · 2 Traction Torque Request Signal · 2 Brake Temperature Monitor Circuit · 1 Brake Shift Interlock Circuit · 1

Body — 10 families, 189 codes

SRS Seatbelt Pyrotechnic Actuator Deployment · 42 ADAS Sensor Cleaning System Circuit · 40 SRS Airbag Squib Deployment Control · 34 SRS Occupant Classification Sensor Circuit · 26 SRS Impact Rollover Sensor Circuit · 16 SRS Seatbelt Buckle Tension Sensor Circuit · 11 HV Power Outlet Converter Circuit · 8 SRS Warning Lamp Indicator Circuit · 7 ADAS Camera Module Circuit · 3 ADAS Pedestrian Alert Speaker Circuit · 2

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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License OEM Complete · $149 Standard (SAE only) · $49

$49 Standard: 9,249 SAE codes · $149 OEM Complete: all 15,886 codes, including 6,637 OEM codes across 32 makes · $149 Heavy Duty: 4,212 fault pairs (J1939) · one-time · compare tiers