2002 GMC Sierra 1500 "causes insufficient egr flow" Questions

...Inspect all vacuum and PCV hoses, replace if necessary Check for a dirty fuel filter and proper fuel pressure check the dist.cap and wires PO2E7 no dtc definition found PO401 EGR FLOW ...

...Insufficient Detected Possible causes - EGR passage clogged - Faulty EGR Vacuum Modulator Valve - Faulty EGR Valve - Faulty EGR solenoid valve - EGR solenoid valve harness is open or shorted - EGR ...

...insufficient egr flow code. Originally had pintle position error code. Pintle was sticking. Replaced egr valve, no more pintle code, but soon set P0401 code. Followed GM trouble chart, no problem ...

...Insufficient EGR Flow Detected Possible Causes: DPFE sensor signal circuit is shorted to ground DPFE sensor VREF circuit is open between sensor and PCM DPFE sensor downstream hose off or plugged DPFE ...

...EGR) system flow is insufficient. Read more how the EGR system works below. What could cause the code P0401 - clogged or restricted EGR passages - faulty EGR valve - EGR valve stuck closed - problems ...

Insufficient Detected Possible causes - Harness or connectors (EGR volume control valve circuit is open or shorted.) - EGR volume control valve stuck closed - EGR volume control solenoid valve - Dead

...backpressure of the exhaust system can cause P0401 exhaust system leak can cause an insufficient amount of EGR flow a restriction in the intake manifold such as carbon deposit and casting

Insufficient Dectected Possible causes - Harness or connectors (EGR volume control valve circuit is open or shorted.) - EGR volume control valve stuck closed - EGR volume control solenoid valve - Dead

...Insufficient Exhaust Gas Recirculation (EGR) Flow. The computer has detected that something is wrong with the EGR system. Can be caused by the EGR tube being blocked/restricted, bad EGR valve, EGR ...

insufficient detected causes for this code are--hose leak/blocked--basic setting not carried out (if applicable)--wiring--EGR valve--EGR solenoid---ECM try cleaning the egr valve and replacing the egr