Question about 2004 Jeep Grand Cherokee
Try turning the ignition on and off three times without cranking the engine. On the third key on position, leave ignition on. Where the odometer is at should list a P-code. This usually says what the check engine light is. For example if P0455 means you would have a large EVAP leak. Typing the code in Google is a must, but you would have to list it a OBDII code P0455 or such. Hope this helps.
Posted on Mar 24, 2011
There are lots of specific things it could mean, but basically its telling you something is not working right under the hood..more than likely has to do with the emissions equipment. as long as the light is not flashing, its not too serious, but requires attention soon. if it is flashing it requires immediate repairs or engine/vehicle damage will result. number one cause: did you get gas recently? if you did and the light came on soon after you may not have tightened the gas cap fully causing an evap leak which would turn on the check engine light. make sure the gas cap clicks! also look underneath the gas cap..there should be a rubber "o" ring in there...it should be smooth, not all dried up and cracked. also look at the filler nozzle where the gas cap goes on..is it all rusty? if it is youll have to clean it off down to shiny smooth metal and try a light film of oil on it to keep the rust at bay. also, im not sure what year dodge/jeep stopped making it east to pull your own codes, but you can try this. step 1: turn off ignition and remove key.
step 2: insert key and turn it to run, back to off, back to run, back to off and back to run again this time leaving it in the run position
step 3: watch your digital odometer.... it will read out a series of codes, the first and last will be the same code so ignore them, they just tell you the beginning and end of the test.
step 4: write down the codes and either call the dealer to find out what they are, or look them up online. dont forget the letters in front of the numbers.
if doing this ignition switch test and your odometer does not read out anything, this year vehicle might not support this.. (it works on my 2001 caravan and wifes 2002 neon...you may get lucky) if it does not work, you can go to the local autozone or advanced autoparts and they will scan the car for free.
Posted on Mar 24, 2011
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Posted on Jan 02, 2017
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