PCM vs ECM vs ECU vs TCM (What’s the Difference?)

PCM vs ECM vs ECU vs TCM

Before vehicle computers were invented, cars and trucks used a system of mechanical and pneumatic devices to manage systems such as valve timing and idle speed.  Now, modern vehicles have a complex system of sensors and actuators connected to computers … Read more

6 Symptoms of a Bad PCM (and Replacement Cost)

bad PCM symptoms

The Powertrain Control Module (PCM) is a sophisticated piece of machinery. It receives data from a range of sensors. The Engine Control Module (ECM) and the Transmission Control Module (TCM) are both examples of systems that the PCM monitors. Remarkably, … Read more

5 Symptoms of a Bad ECU (and Replacement Cost)

bad ECU symptoms

The engine control unit (ECU), also referred to as the engine control module (ECM), is an electronic module that controls the function of the engine. This is done through a series of electronic components and sensors which compute data back … Read more

What is Limp Mode? (Symptoms, Causes, and How to Fix)

what is limp mode

Limp mode is a self-preservation feature programmed into most vehicles. Your car will activate this feature when it detects abnormal readings from sensors, or improper mechanical part operations.  Limp mode is also known as “limp home mode”, and is designed … Read more