Common abbreviations

Air Temperature Sensor

ATS AFM Air-flow Meter – not a MAF type (see below). It could be, for example, a vane type Crank Angle Sensor

CAS CPS Crank Position Sensor

CTS Coolant Temperature Sensor

ECT Engine Coolant Temperature

ECU Electronic Control Unit

EGR Exhaust Gas Recirculation – meters exhaust gas back to the intake manifold

EML Engine Management Light

EMS Engine Management System

EPC Electronic Power Control

FCR Fault Code Reader

HT High Tension – ignition output to the spark plugs

IAV Idle Air Valve

ISCV Idle Speed Control Valve – usually operated by a motor controlled by the ECU LOS Limited Operating Strategy – if the ECU detects a malfunction, it runs a programme to allow the car to still go, but at reduced efficiency

MAF Mass Air-flow meter

MAP Manifold Air Pressure

MIL Malfunction Indicator Lamp

PCV Positive Crankcase Ventilation – takes crankcase gases and recycles back to the inlet system

TBPS Turbo Boost Pressure Sensor – used by the ECU to regulate turbo output

TPS Throttle Position Sensor

VSS Vehicle Speed Sensor

WOT Wide Open Throttle