Jeep Grand Cherokee: Common Problems, Fault Codes & Repairs Everything for the Jeep Grand Cherokee in one place — its common problems and reliability, the fault codes owners see most, and the tools to diagnose them. Jeep Grand Cherokee fault codes Jeep Grand Cherokee P0171Jeep Grand Cherokee P0300Jeep Grand Cherokee P0401Jeep Grand Cherokee P0420Jeep Grand Cherokee P0455 Jeep Grand Cherokee specs & capacities Jeep Grand Cherokee — Fuse box location & guideJeep Grand Cherokee — Oil capacity & typeJeep Grand Cherokee — Tire pressureJeep Grand Cherokee — Towing capacityJeep Grand Cherokee — Bolt pattern & wheel sizes Recommended tools Automotive MultimeterCompression TesterBattery & Charging System Tester Read your code: OBD-II scanners →