Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
EGR System: Description
Exhaust Gas Recirculation (EGR) system is used on all models except 2.2L turbo. The EGR allows a predetermined amount of exhaust gas to recirculate to the intake manifold, diluting the incoming air/fuel mixture. This diluting of the air/fuel mixture reduces peak combustion temperatures. The lower combustion temperature reduces emissions of oxides of nitrogen (NOx).
California models use on-board diagnostics for the EGR system. The diagnostic system uses a solenoid in the vacuum line to the EGR valve.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.