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.
Exhaust Gas RECIRCULATION (EGR) System: Description
The Exhaust Gas Recirculation (EGR) System used on all Courier models is designed to reintroduce a small amount of exhaust gases into the combustion cycle, thereby reducing combustion temperatures and reducing the generation of oxides of nitrogen (NOx). The amount of exhaust gases reintroduced and the timing of the combustion cycle are controlled by various factors such as engine vacuum and temperature. The EGR system's main components are the EGR valve, thermo valve(s), three-way solenoid valve (if equipped), and vacuum amplifier.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.