Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


definitely annoying
Typical Repair Cost:
No data
Average Mileage:
134,500 miles
Total Complaints:
1 complaints

Most Common Solutions:

  1. not sure (1 reports)
2002 Jeep Grand Cherokee exhaust system problems

exhaust system problem

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2002 Jeep Grand Cherokee Owner Comments

problem #1

Jun 152015

Grand Cherokee Laredo 4.0L I6

  • Automatic transmission
  • 134,500 miles


2002 Jeep Grand Cherokee 4.0L. Has had Check Engine light illuminated on gauge cluster since approx. 134,500 miles. The Jeep has 136,045 miles as of this posting. When the key sequence (On/Off/On/Off/On) to check for OBD-II fault codes is performed, odometer display reads' P0442' and 'P0456' as the codes. This is apparently an emissons problem. The Jeep did have the 'P0442' and 'P0456' codes when it was first purchased in May of 2014, along with a 'P0455' code. Some hoses were replaced when an evap. smoke test was completed to determine leaks from the hoses.

- , Fallston, MD, USA

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