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
PCM monitors EGR valve pintle position input to ensure that valve responds properly to commands from the PCM. When ignition is turned on, PCM learns the EGR closed valve pintle position. PCM compares the learned EGR closed valve pintle position to the actual position when EGR valve is commanded closed. If actual EGR position indicates that EGR valve is still open when PCM is commanding EGR closed, DTC will set.
Conditions for setting DTC are: no CKP, ECT, IAT, MAF, MAP, TP or VSS DTC set, no misfire, idle speed, fuel injector related DTCs set, system voltage 10-16 volts, EGR feedback is.2 volt or greater than EGR closed valve pintle position when desired EGR position is commanded to zero percent and conditions are present for longer than 20 seconds.
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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.