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.
Circuit Description
The ECM operates a solenoid to control EGR valve. This solenoid is normally closed. By providing the ground path, the ECM energizes the solenoid to allow vacuum to flow to the EGR valve. The ECM control of EGR is based upon the following inputs: engine coolant temperature above 77°F (25°C), throttle position off idle, and MAP sensor reading.
If Code 24 is present, use that chart first.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.