Nope, I take that back, it's the EGR vacuum control valve and the solenoid valve should be under there too. What it does: The Exhaust Gas Recirculation (EGR) System injects a metered amount of exhaust gas into the intake manifold, lowering peak combustion temperatures. Lowering peak combustion temperatures inhibits the production of NOx. (Production of Oxides of Nitrogen (NOx) is greatest at combustion temperatures over 2300°F.) Hope that helps!