Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Manifold Air Temperature (MAT) Sensor



Manifold Air Temperature (MAT) Sensor






NOTE: The MAT sensor is not used on E-Series models.

The PCM receives an intake air temperature from the Manifold Intake Air (MAT) sensor. Based on this signal the PCM adjusts fuel and timing. The sensor is located in the compressor manifold downstream from the intercooler.