Q: Service engine error code P0401.

asked by on

As indicated by the error code P0401, the EGR valve ports were cleaned and gasket was removed and replaced with a new one. How long before or how many miles before the service engine light disappear?

My car has 185000 miles.
My car has an automatic transmission.

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 exhaust pipe coming up from the drivers exhaust manifold. These hoses get damaged from the heat from the exhaust over time and should be replaced with the special heat resistance hose. You will then have to have the codes cleared and then the light will go out. If you want to have this taken care of, a mechanic from YourMechanic can come to your home or office diagnose and clear your trouble codes.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Service engine error code P0401.

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: Difficulty in shifting into 5th and reverse

To answer your question it is the transmission and clutch. The transmission will need to be disassembled and the shift rod bushings linkage and the gear checked for wear or broken bushings and bearings. When the transmission is out, then...

Q: Transmission leak and no acceleration what could be the problem?

It is possible that your transmission could be slipping due to the fluid leak. I would recommend having a transmission inspected by a qualified professional to determine the exact source of the leak. Once the leak source is determined and...

Q: 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...

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 to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...