Glossary Of Terms
GLOSSARY OF TERMS
| ABS | anti-lock brake system |
| backfire, 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 |
| 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/inlet air temperature sensor |
| IAC | idle air control motor |
| JTEC | Combined engine and transmission control module |
| 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 |
| NGC | next generation controller |
| O2S | oxygen sensor |
| PCI | programmable communication 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 ad 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 |
| SKIM | sentry key immobilizer module |
| SKIS | sentry key immobilizer system |
| 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 |