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

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Emission Control Systems: Application and ID

Engine Northstar 4.6L (279 cid) DOHC

Fuel System Sequential Multiport Fuel Injection (SFI)

DEVICES & SYSTEMS

CAT Three Way Catalyst
PCM Powertrain Control Module
EGR Exhaust Gas Recirculation System
EVAP Evaporative Emission Control
FR Fuel Pipe Restrictor
OXY [1] Heated Oxygen Sensors
MRL [2] Maintenance Reminder Lamp
[1][2]PCV Positive Crankcase Ventilation
IC Ignition Control

Remarks:

[1] Four Heated Oxygen Sensors
[2] "Service Engine Soon" light