The powertrain control module (PCM) in your Jeep Wrangler acts as your engine's brain. Here's where it can cause problems, and how to fix them.

Many owners of older 2007 Grand Cherokees report a failure of the Power Control Module (PCM) that causes the vehicle to stall out while driving, sometimes at highway speeds.

American Expedition Vehicles has engineered the ProCal Module which quickly and easily recalibrates the ECM of the Jeep JK Wrangler and corrects te speedometer and gear ratio even with bigger ...

Find 2004 Jeep Grand Cherokee recalls information, reported by the NHTSA, and we will help you find a nearby service center where you can get your car fixed.

Read about AEV's new ProCal Jeep speedometer calibrator tool that allows you to calibrate your speedometer even after doing a gear swap, and adding bigger tires, only on 4wdandsportutility.com ...