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 which enable the vehicles to perform well and efficiently. These electronics are confusing enough without … 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, the PCM also analyzes the data it collects. It uses that information to control the … 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 to the engine. Based on what this data indicates, the engine will perform a specific … 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 to protect your engine and transmission from catastrophic failure. Performance of your vehicle will be … Read more