Skip the auto shop - Our mechanics make house calls

Q: Car stalls and P0401 insufficient egr flow

asked by on

When in Drive, my car tries to stall and sometimes does stall and tries to move forward. It stops once it has warmed up and driven several miles. There was a P0401 insufficient egr flow, but I removed the egr valve and it’s cleaned, plus also checked the intake manifold & it’s clean and we replaced the vacuum hose. Then I ran a wire down the egr pipe and it’s clear too. When this problem first happened, I thought it was the tranny and I went to an auto store where they told me the car was getting P0401 and that it should be fixed. Tried a 2nd auto store and they said the same, to get it fixed. More details for you: Within a month, after removing the fuel injection body, I cleaned out as I got a code for the position sensor on that - solved that. I used a synthetic oil to perform an oil change, as I’ve done other times too. Also a month ago, I replaced the spark plugs. I’m out of a job right now, so I need to find a way to fix this myself so I don’t have to ride my motorcycle in 100 degrees to go to job interviews. Please, can you tell me how to fix this stalling problem?

The P0401 code is for low EGR flow, but would not be the cause of the stalling if the flow was too low. You also state the problem is when the engine is cold and goes away after it is warm. The EGR system does not start working until the engine is warm.

It sounds like you are having a problem with the transmission or torque convertor. Have a mechanic that knows transmissions check the vehicle when it is cold to see if the engine or transmission is the problem. Sometimes the transmission seals will leak internally causing these problems until the fluid warms up. If you want to have this checked, a technician can diagnose your Check Engine Light and stalling issue thoroughly to determine what repairs will resolve your car problems.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car dies on exit ramp coming off interstate

Hello. I will be happy to assist you. I believe the problem you are having could be a result from a faulty mass air flow sensor or a throttle position sensor. Each component heavily inputs on the air fuel ratio of the vehicle....

Q: On interstate, engine died, idled, no power

Hello there, The TPS can be a serious issue if the car dies like it did. I would not recommend driving the vehicle until repairs have been performed. There is no recall for this fault though there is a technical...

Q: Ripped cv boot

Driving with an axle boot that is torn will cause the internal lubricating grease to get washed out of the joint and dirt to get into the joint. If you have to make a trip it should be able to...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...