Sensor Modules: what it does and what each make calls it

What does this module do?

This heading collects sensor units that join the network with their own identity: intelligent battery sensors, rain/light sensors and similar. Unlike a simple sensor, they publish their measurement as a network message.

What do the makes call this module?

The name of a module doing the same job changes from make to make. The names below are the actual definition names used under this type in the CarCoding scan map (51 distinct names):

Module name	Address
12V Li-ion battery LIB (29-bit)	`18DA0BF1`
12V Lithium Battery	`18DA0BF1`
Accelerator pedal position sensor (11 bit)	`71A`
Air Quality Sensor	`17FC163F`
Air Quality Sensor	`17FC163F`
Air Quality Sensor 2	`17FC1725`
Air Quality Sensor 2	`17FC1725`
Around view monitoring system	`776`
BMS 12V Main LIB	`18DA94F2`
CAN BAT Interface	`18DA5DF2`
Central Sensor XY	`17FC16AD`
Central Sensor XY	`17FC16AD`
ESP Sensor Unit	`17FC163D`
ESP Sensor Unit	`17FC163D`
Front Sensor Driver	`17FC16A4`
Front Sensor Driver	`17FC16A4`
Front Sensor Driver Center	`17FC17B0`
Front Sensor Driver Center	`17FC17B0`
Front Sensor Passenger	`17FC16A5`
Front Sensor Passenger	`17FC16A5`
Intelligent Battery Sensor	`74F`
Intelligent Battery System (2019-)	`604`
Interior Presence Radar	`18DACDF1`
Interior Temperature Sensor	`17FC1758`
Interior Temperature Sensor	`17FC1758`
Light and rain sensor	`755`
Mass airflow sensor (11 bit)	`7A1`
NOx Sensor 1	`17FC162E`
NOx Sensor 1	`17FC162E`
NOx Sensor 2	`17FC162F`
NOx Sensor 2	`17FC162F`
Rain light sensor	`682`
Rain/Light / Multifunction Camera	`74A`
Rain/Light Sensor / Wiper	`730`
Rear Sensor Center	`17FC16A8`
Rear Sensor Center	`17FC16A8`
Relative Humidity Sensor In Fresh Air Intake Duct	`17FC1650`
Relative Humidity Sensor In Fresh Air Intake Duct	`17FC1650`
SASM (Steering Angle Sensor)	`797`
SASM (Steering Angle)	`18DA32F1`
Sensor 1 Wet Detection	`17FC175E`
Sensor 1 Wet Detection	`17FC175E`
Sensor 2 Fine Dust Concentration	`17FC1782`
Sensor 2 Fine Dust Concentration	`17FC1782`
Sensor 2 Wet Detection	`17FC175F`
Sensor 2 Wet Detection	`17FC175F`
Sensor Carbon Dioxide Concentration	`17FC1691`
Sensor Carbon Dioxide Concentration	`17FC1691`
Sensor Controlled Power Rear Lid	`17FC164E`
Sensor Controlled Power Rear Lid	`17FC164E`
Sensor Electronics	`721`
Sensor Electronics	`721`
Sensor Fine Dust Concentration	`17FC1692`
Sensor Fine Dust Concentration	`17FC1692`
Sensor For Anti Theft Alarm System	`17FC1616`
Sensor For Anti Theft Alarm System	`17FC1616`
Side Sensor A-Pillar Driver Front	`17FC1730`
Side Sensor A-Pillar Driver Front	`17FC1730`
Side Sensor A-Pillar Passenger Front	`17FC1731`
Side Sensor A-Pillar Passenger Front	`17FC1731`
Side Sensor B-Pillar Driver Front	`17FC1733`
Side Sensor B-Pillar Driver Front	`17FC1733`
Side Sensor B-Pillar Passenger Front	`17FC1734`
Side Sensor B-Pillar Passenger Front	`17FC1734`
Side Sensor Driver Front	`17FC16A0`
Side Sensor Driver Front	`17FC16A0`
Side Sensor Driver Rear	`17FC16A2`
Side Sensor Driver Rear	`17FC16A2`
Side Sensor Passenger Front	`17FC16A1`
Side Sensor Passenger Front	`17FC16A1`
Side Sensor Passenger Rear	`17FC16A3`
Side Sensor Passenger Rear	`17FC16A3`
Steering Angle Sensor	`622`
Steering Angle Sensor	`7B3`
Steering Angle Sensor	`7B3`
Steering angle sensor	`783`
Steering assist module/SASM (Steering Angle) / Steering Angle Sensing Module	`797`
Sunlight Sensor	`17FC170A`
Sunlight Sensor	`17FC170A`
Sunlight Sensor 2	`17FC1711`
Sunlight Sensor 2	`17FC1711`
Surround monitor view	`793`
Vehicle Position Detection	`750`
Vehicle Position Detection	`750`

Which makes define it?

The map holds 84 definitions for this type, spread across 15 make groups:

Address and protocol

Every definition in the map is marked as UDS. 20 of the addresses are 11-bit CAN identifiers (three digits, such as 7E0) and 64 are 29-bit extended identifiers (such as 18DA10F1). The most frequent addresses for this type are: 17FC1616 (2), 17FC162E (2), 17FC162F (2), 17FC163D (2).

An address being defined in the map does not mean the module can be read on every vehicle. Reaching modules outside the mandatory OBD-II emissions channel depends on the manufacturer protocol and on the vehicle itself.

Related fault codes

Fault codes stored in this module usually belong to these groups:

Looking for what a fault code means? Fault code library.

Other module types

← All ECU modules

Sensor Modules on your own vehicle

With an ELM327-based BLE OBD2 adapter, CarCoding scans the vehicle’s modules, reads fault codes from those it can reach and explains every code in plain language. Which modules are reachable depends on the make and on the vehicle. The app is free to download.

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Some advanced features require an in-app purchase.

Data source: the CarCoding ECU scan map (ecuDatabase.ts). The addresses and names in the table are definitions from the map; they can differ depending on the hardware and software version in your vehicle.

Disclaimer: This page offers general information and does not replace an inspection by a qualified workshop. Any work carried out on the vehicle is your own responsibility.