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Chris Calderone

Chris ... 6/22/2012

2001 Jeep Grand Cherokee Laredo 6 Cyl 4.0L


Why does the engine light go on when there is nothing wrong with the jeeps engine?

Every so offen it goes on?

2 Answers

Mike Simmons

Mike Simmons 6/25/2012

The Jeep is equipped with a multitude of sensors that monitor the emissions system and engine performance. If one of these sensors returns a value that is out of the programmed range of expected values, the MIL (malfunction indicator lamp) will illuminate. If the MIL stays on steadily, it indicates a relatively minor malfunction and the vehicle can be driven to a place of repair. If the MIL illuminates and flashes, this indicates something more serious and the vehicle should not be driven until repairs are made. Your vehicle may seem to run OK with the MIL illuminated, but there is something wrong that needs attention.


Chris 6/26/2012

On a fair number of Chrysler vehicles you are able to pull up stored codes by cycling the key 3 times. Starting in the off position, turn the key to "ON" (position before start), then off, on, off, on, finally leaving the key in the on position. Most of the time the stored code/codes are displayed on the odometer screen. Get the code and search.


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