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.
Overall Function Check
Use this procedure to check the overall EGR function. During this check, a 1st trip DTC might not be confirmed.
WITH GST
- Start engine and warm it up to normal operating temperature.
- Disconnect EGRC solenoid valve harness connector. (The 1st trip DTC for EGRC solenoid valve will be displayed, however, ignore it.)
- Check the EGR valve lifting when revving engine from 2,000 RPM to 4,000 RPM quickly under no load using the following methods.
EGR valve should lift up and down without sticking.
If NG, go to DIAGNOSTIC PROCEDURE .
If OK, go to the next step.
- Check voltage between ECM terminal 63 (EGR temperature sensor signal) and ground at idle speed.
Less than 4.5V should exist.
If NG, go to next step.
- Turn ignition switch OFF.
- Check harness continuity between EGR temperature sensor harness connector terminal 2 and ECM terminal 43 (ECM ground).
Continuity should exist.
- Check "EGR TEMPERATURE SENSOR". Refer to COMPONENT INSPECTION .
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.