What is a TMAP Sensor - Temperature Manifold Absolute Pressure Sensor?

The TMAP sensor is a key measuring device to provide additional information, much like a MAP Sensor. Your TMAP sensor responds to the air pressure within the intake manifold and allows the ECM or Engine Control Module to determine two important parameters:

• Atmospheric pressure at key on.
• Engine load.

Why is the TMAP Sensor so important?

However, they also have an additional intake temperature sensor to help the ECM better estimate the air density within the intake manifold.  The TMPA Sensor is vital for optimum engine operation on On turbocharged vehicles. This is due to the constant changes in air density and temperature being altered by the actions of the turbocharger and the intercooler.

Where is the TMAP Sensor located on my Diesel engine?

The TMAP sensor is usually mounted on the manifold housing itself, on pipework between the manifold and the intercooler, or the outlet of the intercooler.