You are watching: 1999 jeep grand cherokee check engine light
Great news! your Jeep is equipped through OBD (on-board diagnostics), so girlfriend should have the ability to do this without much hassle.
When the happens, immediately pull over and also turn the Jeep off, and also turn the an essential 3 time in succession, turning the key just till the odometer lamp up. Top top the 4th key turn, the CEL (check engine light) codes will flash (either one, or multiple). Write those down! They will be a PXXX number.
Post up the error code right here or usage a website that details the password reasons, which will certainly tell girlfriend what is walk on through the vehicle.
If her Jeep is making the CEL disappear once you revolve off the ignition, make your way to an Autozone/O"Reilly"s kind of location while the light is on and have them plug in their diagnostic tool.
I will notify you the my 2000 Jeep grand Cherokee had similar issues come what you describe, and a video camer position sensor had gone out. I changed that and it resolved the issue.
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answered Nov 6 "17 in ~ 17:18
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Most modern cars will go into a "safe" setting if castle detect a problem which might potentially damages the engine this will commonly retard the ignition and also reduce the rev border to mitigate engine load as much as possible but still permit you to obtain home.
The type of intermediate error you are describing argues either a sensor difficulty or an ignition or other electronic issue. A negative crankshaft sensor often causes these sorts of symptoms.
As others have mentioned the first step is to plugin an OBD sensor and read the fault code which will certainly at the very least narrow down the problem. You have the right to either purchase one yourself reasonably cheaply or take it it to trusted mechanic.
In many cases a certain code will certainly either be simply a bad sensor or said to part known problem with that certain make and also model.
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answered Nov 6 "17 at 19:40
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