How to Test a PCM

Modern cars rely on computers to manage their various systems. For example, when was the last time you or someone you know had to adjust their car’s timing? Unless you’re a classic car collector or you’re old enough to carry an AARP card, the answer is probably “never”. There’s a reason for that; we have…

7 Common PCM Failure Symptoms

Not too long ago, all of our cars’ systems were manual. From timing to tire pressure, you had to keep an eye on every aspect of your vehicle, and it was routine for mechanics to give your car a “tune-up” along with your oil change.  Ever wonder why that isn’t necessary anymore? The reason is…

How To Know If You Need a Jeep PCM Replacement

The Powertrain Control Module (PCM) is the computer that controls most of your Jeep’s essential systems. The PCM controls the engine timing, the fuel to air ratio, the transmission, and the anti-lock brakes, along with dozens of other smaller functions. When your PCM fails, it can cause you to lose fuel efficiency and possibly fail…

P0603 Code: What It Means and How to Fix It

A P0603 code is one of many universal error codes that your car may generate. If you see this code on your code scanner, it could mean anything from the minor inconvenience of replacing your battery to serious powertrain problems like mistimed shifting. In this article, we’ll discuss possible causes of the P0603 code, how…