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 PCM. The EGR (linear) valve is controlled by using an ignition positive driver and ground circuit within the PCM. The driver has the ability to detect an electrical malfunction in the ignition voltage or ground circuit, then signal the PCM to set the DTC.
Conditions for setting this DTC:
- Ignition switch in CRANK or RUN positions.
- No CKP, ECT, IAT, MAF, MAP, TP, VSS sensors, misfire, idle speed or fuel injector related DTCs set.
- System voltage at 10-16 volts.
- EGR feedback is .4 volt greater than EGR closed valve pintle position when EGR is commanded to zero percent.
- Conditions 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.