How do you read trouble codes 2002 Jeep Grand Cherokee?

Answer 1

With your key in the ignition switch and in the off position, switch key to on (not to start), then back to off, then on, off again, then on a third time. If you have trouble codes they will read on your odometer display. For example: P0303, etc. When it is done displaying codes or if there are no codes, it will read P done.

Answer 2

turn key on/off three times and the computer will blink out codes if there are any, i believe 5-5 is for computer acknowledge if that's all it blinks then you have no codes. you can get the numbers out of any chilton boook or Google them they are usually out there. it blinks first # then quick pause then blinkks second #

Answer 3

Vehicles after 1995 require the use of the OBDII scan tool to retrieve/read the trouble codes. Auto supply stores such as AutoZone, Advance, Chief, etc. usually will scan free of charge.