Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
The EGR system tends to get clogged with carbon built up. You can try to clean the EGR valve and its tubing before replacing anything.
The cost of diagnosing the P0401 1997 HONDA CIVIC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Low EGR flow control is detected
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