Emission Control

Location of Emission Control Components in Engine Compartment, SOHC Engine Vehicles

A – PCV valve;
B – fuel vapor purge control valve.

Location of Emission Control Components in Engine Compartment, DOHC Engine Vehicles

A – PCV valve;
B – fuel vapor purge control valve.

Emission Control and Evaporative Emission Control System Diagram

1 – oxygen sensor;
2 – catalytic converter;
3 – oxygen sensor;
4 – coolant temperature sensor;
5 – spark plug;
6 – ignition coil;
7 – ignition switch;
8 – control relay;
9 – ECM amplifier;
10 – PCV valve;
11 – acceleration sensor;
12 – idle speed control valve;
13 – ECM;
14 – mass air flow meter and intake air temperature sensor;
15 – air filter;
16 – throttle position sensor;
17 – knock sensor;
18 – canister purge valve;
19 – crankshaft position sensor;
20 – fuel tank;
21 – charcoal canister;
22 – muffler.

The following exhaust emission control systems are used to reduce harmful substances released into the atmosphere with the exhaust gases:

– evaporative emission control system;
– crankcase ventilation system;
– exhaust gas recirculation system;
– catalytic converter.