At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
You would need the flow chart for the code as it pertains to Chrysler products. Code 401 means the computer is getting a low flow signal from the EGR valve sensor. The flow could in fact be low due to the EGR not opening, or the sensor could be faulty.
code P0401 is an EGR code. which is insufficient EGR (exhaust gas recirculation) flow.it is quite common for people to just replace the EGR valve.
You can try doing it your self.:---- To troubleshoot these issue and solve it yourself.I suggest you to go through few help links related to OBD code P0401:----- Click the link below:-----
but for convenience I have reproduced that information here: . Generic OBD Error Code Details for P0401Exhaust Gas Recirculation Flow Insufficient Detected
What does this mean? OBD Code P0401refers to EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.
SymptomsPossible sumptoms of OBD code P0401 You may notice drivability problems such as pinging (a.k.a. pre-ignition knock) when the engine is under load or the vehicle is at higher speeds. There may also be other symptoms.
CausesPossible causes of OBD code P0401 A code P0401 most likely means one or more of the following has happened: •The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced•There is a blockage in the EGR (tube), most likely carbon buildup •The EGR valve is faulty •The EGR valve may not be opening due to a lack of vaccuum
Possible SolutionsIn fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit. •Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open •Clean out the EGR valve and/or tubing to remove deposits•Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)•Replace the DPFE sensor (with a good quality / OEM one)•Replace the EGR valve
Related CodesP0400 P0402 P0403
Its either a faulty EGR valve or it has carbon build up inside.Take valve off and clean carbon out using a non-chrlonated brake cleaner and wire brush.
The first code, p1684, just states the battery has been dis-connected in the last 50 start cycles.
Code p0401 is the EGR flow. You may need to replace the EGR valve.
Code p1193 is the intake air temperauture ( IAT) sensor. It may also need to be replaced.
Have your mechanic take a look at those, and please let me know how it goes.
×