Showing articles & questions for topic

Related articles

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

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...
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...
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...
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...
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...
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...

Need a mechanic?

Our certified mobile mechanics make house calls in over 700 U.S. cities. Fast, free online quotes for your car repair.

Get a quote

Post a question and get free advice from our certified mechanics.

Ask a question