Diagnostic field guide

SENSOR
LIBRARY.

Test strategy, expected behavior, failure clues and scope patterns for common automotive sensors.

START WITH SERVICE INFORMATION.

Values and pin assignments vary by vehicle. These guides teach test strategy—not application-specific specifications.

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01
Engine position

Crankshaft Position Sensor

CKP↗02
Engine position

Camshaft Position Sensor

CMP↗03
Air metering

Mass Air Flow Sensor

MAF↗04
Pressure

Manifold Absolute Pressure Sensor

MAP↗05
Driver demand

Throttle Position Sensor

TPS↗06
Driver demand

Accelerator Pedal Position Sensor

APP↗07
Temperature

Engine Coolant Temperature Sensor

ECT↗08
Temperature

Intake Air Temperature Sensor

IAT↗09
Exhaust mixture

Narrowband Oxygen Sensor

O₂↗10
Exhaust mixture

Wideband Air/Fuel Ratio Sensor

AFR↗11
Chassis speed

Wheel Speed Sensor

WSS↗12
Combustion

Knock Sensor

KS↗13
Pressure

Fuel Rail Pressure Sensor

FRP↗14
Powertrain

Barometric Pressure Sensor

BARO↗15
Powertrain

Boost / Charge-Air Pressure Sensor

BPS↗16
Powertrain

Engine Oil Pressure Sensor

EOP↗17
Powertrain

Engine Oil Temperature Sensor

EOT↗18
Powertrain

Engine Oil Level Sensor

OLS↗19
Emissions

Fuel Tank Pressure Sensor

FTP↗20
Powertrain

Fuel Temperature Sensor

FTS↗21
Transmission

Transmission Input Speed Sensor

ISS↗22
Transmission

Transmission Output Speed Sensor

OSS↗23
Transmission

Transmission Fluid Temperature Sensor

TFT↗24
Transmission

Transmission Pressure Sensor

TFP↗25
Transmission

Transmission Range Sensor

TRS↗26
Chassis

Steering Angle Sensor

SAS↗27
Chassis

Steering Torque Sensor

STS↗28
Chassis

Yaw Rate / Lateral Acceleration Sensor

YRS↗29
Chassis

Brake Pressure Sensor

BPS↗30
Chassis

Tire Pressure Monitoring Sensor

TPMS↗31
Chassis

Ride Height / Level Sensor

RHS↗32
Diesel & emissions

Exhaust Gas Temperature Sensor

EGT↗33
Diesel & emissions

Exhaust Backpressure Sensor

EBP↗34
Diesel & emissions

DPF Differential Pressure Sensor

DPF-DP↗35
Diesel & emissions

NOx Sensor

NOX↗36
Diesel & emissions

Particulate Matter Sensor

PM↗37
Diesel & emissions

EGR Position Sensor

EGRP↗38
Diesel & emissions

EGR Temperature Sensor

EGRT↗39
Diesel & emissions

DEF Level Sensor

DEF-L↗40
Diesel & emissions

DEF Temperature Sensor

DEF-T↗41
Diesel & emissions

DEF Quality Sensor

DEF-Q↗42
Diesel & emissions

Turbocharger Position Sensor

TCV-P↗43
Diesel & emissions

Turbocharger Speed Sensor

TSS↗44
Powertrain

Fuel Composition Sensor

FCS↗45
HVAC & body

Ambient Air Temperature Sensor

AAT↗46
HVAC & body

Cabin Air Temperature Sensor

CAT↗47
HVAC & body

Evaporator Temperature Sensor

EVAP-T↗48
HVAC & body

Refrigerant Pressure Sensor

ACP↗49
HVAC & body

Sunload / Solar Sensor

SUN↗50
HVAC & body

Cabin Humidity / Condensation Sensor

HUM↗51
HVAC & body

Rain Sensor

RAIN↗52
HVAC & body

Ambient Light Sensor

ALS↗53
HVAC & body

Door / Hood / Trunk Position Sensor

AJAR↗54
HVAC & body

Fuel Level Sensor

FLS↗55
HVAC & body

Washer Fluid Level Sensor

WFL↗56
HVAC & body

Coolant Level Sensor

CLS↗57
Safety

Brake Pedal Position / Travel Sensor

BPP↗58
Safety

Clutch Pedal Position Sensor

CPP↗59
Chassis

Vertical Acceleration Sensor

VAS↗60
Safety

Occupant Classification Sensor

OCS↗61
Safety

Seat Position Sensor

SPS↗62
Safety

Seat Belt Buckle Sensor

SBS↗63
Safety

Crash / Impact Sensor

SIS↗64
Safety

Rollover Sensor

ROS↗65
Chassis

Brake Pad Wear Sensor

BPW↗66
ADAS

Forward Radar Sensor

RADAR-F↗67
ADAS

Corner / Blind-Spot Radar Sensor

RADAR-C↗68
ADAS

Forward Camera

F-CAM↗69
ADAS

Surround-View Camera

SVM↗70
ADAS

Ultrasonic Parking Sensor

USS↗71
ADAS

LiDAR Sensor

LIDAR↗72
ADAS

Driver Monitoring Camera

DMS↗73
ADAS

GNSS / Vehicle Position Sensor

GNSS↗74
ADAS

ADAS Inertial Measurement Unit

IMU↗75
Hybrid & EV

12-Volt Battery Current Sensor

IBS↗76
Hybrid & EV

High-Voltage Battery Current Sensor

HVCS↗77
Hybrid & EV

Battery Cell Voltage Monitor

CMU↗78
Hybrid & EV

Battery Module Temperature Sensor

BTS↗79
Hybrid & EV

High-Voltage Isolation Monitor

IMD↗80
Hybrid & EV

Motor Resolver / Position Sensor

RES↗81
Hybrid & EV

Electric Motor Speed Sensor

EMSS↗82
Hybrid & EV

Motor / Inverter Temperature Sensor

MIT↗83
Hybrid & EV

High-Voltage Coolant Temperature Sensor

HVCT↗84
Hybrid & EV

Battery Coolant Pressure / Level Sensor

BCPL↗85
Hybrid & EV

Charge Port Temperature Sensor

CPTS↗86
Hybrid & EV

Onboard Charger Current Sensor

OBC-CS↗87
Hybrid & EV

Regenerative Brake Travel Sensor

RBT↗