Powertrain Management: Application and ID
ABS Anti-lock Brake Systembackfire, popback fuel ignites in either the intake or the exhaust system
CKP Crank Position Sensor
CMP Camshaft Position Sensor
cuts out, misses a steady pulsation or the inability of the engine to maintain a consistent rpm
DLC Data Link Connector (previously called "engine diagnostic connector")
detonation spark knock a mild to severe ping, especially Under loaded engine conditions
ECT Engine Coolant Temperature Sensor
EGR Exhaust Gas Recirculation Valve and system
EMCC Electronic Modulated Converter Clutch
generator previously called "alternator"
hard start The engine takes longer than usual to start, even though it is able to crank normally.
hesitation, sag, stumble There is a momentary lack of response when the throttle is opened. This can occur at all vehicle speeds. If it is severe enough, the engine may stall.
IAT Intake Air Temperature Sensor
IAC Idle Air Control valve
JTEC Jeep-Truck Engine Controller
lack of power, sluggish The engine has less than expected power, with little or no increase in vehicle speed when the throttle is opened.
LDP Leak Detection Pump
MAP Manifold Absolute Pressure Sensor
MIL Malfunction Indicator Lamp
MTV Manifold Tuning Valve
O2S Oxygen Sensor
PCI Programmable Communications Interface
PCM Powertrain Control Module
PCV Positive Crankcase Ventilation
PEP Peripheral Expansion Port
poor fuel economy There is significantly less fuel mileage than other vehicles of the same design and configuration
rough, unstable or erratic idle stalling The engine runs unevenly at idle and causes the engine to shake, if it is severe enough. The engine idle rpm may vary (called "hunting"). This condition may cause stalling if it is severe enough.
SBEC Single Board Engine Controller
start & stall The engine starts but immediately dies.
surge engine rpm fluctuation without corresponding change in throttle position sensor
TPS Throttle Position Sensor
TRS Transmission Range Sensor
VSS Vehicle Speed Sensor/Signal