Besides, it was the first vehicle released by Chrysler after they purchased the Jeep brand. Unfortunately my CO-worker's vehicle cannot pass inspection with the light on and the dealer cannot diagnose the problem.The Jeep Grand Cherokee is a truly innovative mid-size luxury SUV, as from the very beginning it never employed body-on-frame construction and was always offered as a unibody vehicle. The vehicle has been back to the dealer on numerous occasions and the cause has yet to be discovered. A CO-worker has a 2002 Grand Cherokee and the mil comes on intermittently. In addition, the dealerships are profiting by repairing these weak components at the owners expense. These evaporative leaks present a danger to the vehicle operators (escaping gas fumes) and the environment. I believe the emission system components on these vehicles are weak. Since this emission component was no longer under warranty the repair cost of $293. A leak from a vapor hose was the cause this time. This time the dtc was p0456 - small leak from the evaporative system. On 8/19/08 (mileage 21,351) the vehicle was again returned to the dealer because the mil was on. A leak was found at the fuel pump seal and was replaced under warranty by the dealer. The diagnostic trouble code (dtc) was p0455 - large leak from the evaporative system. On 12/23/06 (mileage 11,948) my vehicle was returned to the dealer because the engine malfunction indicator light (mil) had illuminated and remained on after several normal driving cycles.
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