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P0401

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P0401 OBD-II Trouble Code: Exhaust Gas Recirculation Flow Malfunction
P0401 code definition Exhaust Gas Recirculation Flow Insufficient Detected What the P0401 code means P0401 is an OBD-II generic code that the engine control module (ECM) detected the engine exhaust gas...

Related questions

Question
Engine light on
Hi there. A code P0401 indicates that the EGR system is not working properly. The EGR, or exhaust gas recirculation system, is used for emissions to reduce the NOX emissions. If it's not functioning and opening as it should, then...
Question
Service engine error code P0401.
The light will not go away until the P0401 code is cleared from memory with a scanner. You should check the two heat resistant hoses that go to the DPFE sensor or the EGR sensor that goes down to the...
Question
My car has two error codes
Getting a hold of the OBD codes is definitely a great first step to diagnosing your Mitsubishi, but it must be noted that OBD codes are only a starting point, not a diagnosis. The codes P0401 and P0431 are actually...
Question
Engine code P0401
Engine code P0401 on your Honda Accord indicates that there is low flow to the EGR valve. The repair for this is to remove the EGR valve and, using a special tool, cleaning the passages of the EGR tube. In...
Question
P0421 and P0401 codes have appeared
Hello. The codes P0421 and P0401 refer to the oxygen sensor and EGR valve, respectively. It is possible that an issue with one is causing the fault to be seen by the other, as they will work loosely together. It...
Question
Engine is running rough and P0401, P0171 and P0174 codes.
The first thing to check is to see if the EGR solenoid will release the vacuum when the electrical connector is disconnected. If it still doesn't release the vacuum then the solenoid should be replaced. The codes need to be...
Question
My car doesn't pass emissions because the catalyst system is below threshold, and the exhaust gas recirculalation is insufficient.
Hi there. The Engine Gas Recirculation (EGR) valve could be sticking or full of deposits from the exhaust system. Remove and clean the EGR valve before replacing it to see if the system will begin to operate. The oxygen sensors...
Question
Engine light on code P0401
Assuming that the passageways, including any through and within the plenum and intake are truly completely clear, there is likely a problem with other EGR system components. On your vehicle, Diagnostic Trouble Code P0401 involves not just blocked passageways and...
Question
My check engine light is on and I have a code P0401 in my 2010 Chrysler Town & Country
Hello. Typically when you get this code it is because you have low flow in the EGR system. If the EGR valve is good and if the tube is clear then you either have a clog in the intake manifold...
Question
1997 chevrolet lumina that has a p0401 code that is persistant
P0401 will often set if the passageway from the EGR valve to the intake is blocked with carbon. If you did not clear that passageway when replacing the EGR valve that is the most likely cause for the code. To...
Question
Egr valve insufficient flow
Insufficient EGR flow is probably not the cause of the rough or low idle and thus is just a coincidental fault. You should repair it and perhaps first, just to be absolutely sure, but rough idle is more likely due...

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