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Common car diagnostic acronyms

Below is a list of common car diagnostic acronyms:

Acronym Explanation
AMFR Air Mass Flow Rate
CAN Car Area Network / Controller Area Network
CTP Closed Throttle Position
DTC Diagnostic Trouble Code
ECM Engine / Electronic Control Module
ECT Engine Coolant Temperature
EGR Exhaust Gas Recirculation
ELC Electronic Level Control
EOBD European On-Board Diagnostics
FMFR Fuel Mass Flow Rate
IAC Idle Air Control
IAT Input Air Temperature
IDM Ignition Discharge Module
KOEO Key On Engine Off
KOER Key On Engine Running
MAF Mass Air Flow
MAP Manifold Absolute Pressure
MIL Malfunction Indicator Lamp
MOP Metering Oil Pump
OBD On-Board Diagnostics
OBD-II On-Board Diagnostics Second Generation
PCM Powertrain Control Module
PRC Pressure Regulator Control
TCM Transaxle Control Module
TFT Transmission Fluid Temperature
TPS Throttle Position Sensor
WOT Wide Open Throttle
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