How to Clear Codes From a Jeep Grand Cherokee

by Dwight Malone

The Jeep Grand Cherokee is a sports utility vehicle that was introduced in 1993 as a way for Jeep to compete against the Ford Explorer. Like all other modern vehicles, the Grand Cherokee has a computer that will alert you to a problem and trigger the "Check Engine" light to illuminate. Once you've corrected the problem, you'll must clear the engine codes. This is a simple procedure that is well within the capabilities of the average Jeep owner.

Step 1

Pop the hood on the Jeep Grand Cherokee by lifting the lever under the dashboard.

Step 2

Release the lever under the front of the hood, and lift up the hood.

Step 3

Locate the battery. It will be on the passenger's side, directly behind the headlight.

Step 4

Place an adjustable wrench around the bolt that is securing the negative battery clamp.

Step 5

Adjust the wrench until it fits tightly around the bolt.

Step 6

Loosen the negative battery clamp, and remove it.

Step 7

Hold the negative battery clamp away from the battery and wait one minute.

Step 8

Place the negative battery clamp back onto the negative battery terminal.

Step 9

Tighten the clamp until it is securely on the negative battery terminal again.

Step 10

Start the Grand Cherokee.

Verify that the "Check Engine" light no longer is on.


  • If you are having a tough time loosening the bolt, spray some lubricant on it and allow it to penetrate the bolt and threading.
  • If the "Check Engine" light is still on after you've disconnected the battery, try disconnecting it again for a longer period of time.


  • Whenever working on the Jeep's electrical system, the ignition should always be in the "Off" position.
  • To avoid an electrical spark and possible injury, never let the positive and negative battery cables touch.
  • Hold the adjustable wrench tightly around the bolt to prevent stripping the bolt.

Items you will need

  • Adjustable wrench

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