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Does a check-engine light really mean something is wrong with your engine? An OBD2 scanner can tell you. What you should do if your idiot light comes on.
A check engine light or malfunction indicator lamp (MIL), is a tell-tale that a computerized engine-management system uses to indicate a malfunction or problem with the vehicle ranging from minor (such as a loose gas cap) to serious (worn spark plugs, engine problems or a faulty oil valve, etc.).
The first included a "Check Engine" light. The second included new process cycles with electric timing retard and the added "Pulse-Air" injection system for emissions control. The third version was updated in 1983 to a new style called the C4 system which used a new microcontroller.
The "Drive-cycle" basically is the representative of the road. Drive cycles are used to reduce the expense of on road tests, time of test and fatigue of the test engineer. The whole idea is to bring the road to the test lab (a chassis dynamo-meter) or to the computer simulation. Two kinds of drive cycle can be made.
Some Honda engine computers are equipped with LEDs that light up in a specific pattern to indicate the DTC. General Motors, some 1989–1995 Ford vehicles (DCL), and some 1989–1995 Toyota/Lexus vehicles have a live sensor data stream available; however, many other OBD-I equipped vehicles do not.
The Chrysler 1.8, 2.0, and 2.4 are inline-4 engines designed originally for the Dodge and Plymouth Neon compact car. These engines were loosely based on their predecessors, the Chrysler 2.2 & 2.5 engine, sharing the same 87.5 mm (3.44 in) bore. The engine was developed by Chrysler with input from the Chrysler-Lamborghini team that developed the ...
The single overhead cam V6 engine introduced in 1993. It was derived from Chrysler's first homegrown front-wheel drive V6, the Chrysler 3.3 engine. The SOHC V6 has been replaced by the Chrysler Pentastar engine. There are three major variants of this basic design: the 3.5 L, 3.2 L, and 4.0 L. Additionally, a 2.7 L DOHC version was developed.
The AMC straight-4 engine is a 2.5 L straight-four engine developed by American Motors Corporation (AMC) that was used in a variety of AMC, Jeep, and Dodge vehicles from 1984 through 2002. The 2.5 L I4 Jeep engine shared design elements and some internal components with the AMC 4.0 L I6 that was introduced for the 1987 model year.