P0401: EGR A Flow Insufficient Detected

“P0401 code caused the car to say "propulsion power is reduced". I was on the highway and had to pull off to find a safe place.”2017 Chevrolet Volt · Apr 2024

“Several incidents when accelerating, the engine goes into a limp mode, followed by indicator lights coming on P0401, P0299, P226C. The vehicle will not accelerate and travels at a max speed of about 5mph. This has happened in traffic every time and has put me and my family, as well as other vehicles, at extreme risk of being in an accident, not being able to accelerate out of the way of oncoming traffic. After several cycles of turning the vehicle off and on, it returns to normal function. The vehicle has been inspected at a Dodge Service station. They determined that the Turbo diesel system is malfunctioning and needs repair. My vehicle is available for inspection upon request.”2015 Ram Promaster · Aug 2021

“Egr and egr cooler failed at 21,000 miles. Dealer fixed under warranty 3/22/16. Same parts have failed again at 46,000 miles and is out of warranty. Searching the web shows this is a common repeat failure for the 6.7 diesel and costs $2,000 for repair. Engine trouble code is p0401. The parts or design must be defective as they only last for about 20,000 miles.”2013 Ford F-250 SD · Jul 2019 · 46,000 mi

“Check engine light came on and the code was p0106 and p0401. I discovered plastic tubing failed by breaking (disintegrating really), all in the vicinity of a part that I suspect controls those functions. The part is a harness with 4 of these plastic tubes that connect to various places. The fact that they are disintegrating indicates the wrong materials are used. Ford motor company should have this issue addressed as a recall for defective materials. I have samples of the tubing that survived.”2010 Ford Explorer · Mar 2017 · 90,000 mi

“2014 ram eco diesel, fails to properly accelerate, sometime acting as if it is stuck in high gear. Total lack of throttle response. Problem is random and began after p0401, p1296 & 1297 cel codes were set. Creates substantial risk when crossing intersections.”2014 Ram 1500 · May 2016 · 65,000 mi

“Car is throwing p0401 fault code for egr valve insufficient flow. Dealer states the diesel particulate filter is cracked. According to data, vw's emissions scandal shows 40% more pollutants spewing into air. This is causing excess emission part failures. Dealer wants $2500+ for repairs. According to vw forums, there are many cases of egr and dpf failures. Contacted vw and they will not assist. My car is due for smog 10/22/2015 and is not passing.”2010 Volkswagen Jetta · Aug 2015 · 95,000 mi

“Tl* the contact owns a 2001 mitsubishi eclipse spyder. The contact stated that the vehicle was taken to the dealer for a tune up and the failure codes for p0301, p0401, and the egr appeared. The codes were cleared, but the p0301 failure code reappeared. The vehicle was repaired; however, the vehicle was later taken in for smog inspection and failed. The vehicle was diagnosed for egr failure. The vehicle was taken to an independent mechanic. The technician repaired the problem, however, the failure persisted. The vehicle was taken back to a dealer but the failure was unable to be duplicated. The manufacturer was not made aware of the failure. The approximate failure mileage was 315,000.”2001 Mitsubishi Eclipse Spyder · Jul 2015 · 315,000 mi