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