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

Exhaust Gas Recirculation (EGR)

ECM

The PCM calculates the amount of EGR needed based on the following inputs:
- The accelerator pedal position (APP) sensor
- The barometric pressure (BARO) sensor
- The boost sensor
- The engine coolant temperature (ECT) sensor
- The exhaust gas recirculation (EGR) vacuum sensor
- The intake air temperature (IAT) sensor
- The mass airflow (MAF) sensor
- The vehicle speed sensor (VSS)
- The engine speed