How Do I Fix The Code P0401 On My Honda Accord?

If DTC P0401 or P1491 is stored, or if the engine hesitates or surges, clean the EGR port,

install an EGR pipe kit, and clear the code

. The problem is also common in most 1998-2001 Honda Accord. The factory released a bulletin with instructions on how to clean the intake system.

Can I drive with a P0401 code?

Hi There, Code P0401 relates to

the EGR valve flow

. When this code is triggered, the computer has detected that the flow is insufficient. Driving the car until next week will not cause any harm, although the vehicle may not run well.

How do I fix code P0401?

1. Replacing the leaking or clogged EGR valve.
2. Replacing a broken vacuum line to the EGR valve or control solenoid.
3. Replacing an EGR temperature sensor or clean the carbon off of it to repair it if it does not register enough of a temperature change.

How do I know if my EGR valve is bad?

1. Your engine has a rough idle. …
2. Your car has poor performance. …
3. You have increased fuel consumption. …
4. Your car frequently stalls when idling. …
5. You can smell fuel. …
6. Your engine management light stays on. …
7. Your car produces more emissions. …
8. You hear knocking noises coming from the engine.

How do you clean the EGR port on a Honda Accord?

1. Remove the vacuum lines and the wiring harness connector from the EGR valve. …
2. Unbolt and remove the two retaining bolts on the bottom of the valve. …
3. Inspect the EGR valve. …
4. Spray the inside of the EGR valve with carburetor cleaner, then shake the EGR valve out.

Is it bad to drive with a bad EGR valve?

Can I drive with a bad EGR valve? Technically,

you can drive your vehicle with a bad EGR valve

, but your vehicle will run rough, shake at idle, and a check engine light will be illuminated. You might also hear popping sounds while driving down the road.

How much does it cost to replace a EGR valve?

The average cost for an EGR Valve Replacement is

between $314 and $399

but can vary from car to car.

How much does it cost to fix P0401?

Total repair costs range from

$150 to $750

, inclusive of labor and parts. It is important that you pay close attention to your vehicle's warnings. If you get a P0401 trouble code, immediately schedule an appointment with your trusted mechanic.

What can cause a P0401 code?

• Clogged or restricted EGR passages due to excess carbon.
• Faulty EGR valve.
• EGR temperature sensor is covered with carbon.

Can I clean my EGR valve?

To clean the valve, wear an acid-resistant pair of gloves. Put on safety glasses, too, as the carbon deposits could become airborne in the process.

Spray the EGR valve cleaner onto the carbon deposits

. Remove the carbon buildup with the use of a pipe cleaning brush and dull scraper.

Can I disconnect my EGR valve?

If you unplug it, while the truck is off, then

the EGR will stay closed

. If the EGR valve is clogged or completely blocked off it can longer re-burn harmful emissions in the combustion chamber. You're now sending the exhaust gas away from the engine when using an EGR delete kit, which means it begins to run cleaner.

How do you clean an EGR valve without removing it?

To clean the valve, wear an acid-resistant pair of gloves. Put on safety glasses, too, as the carbon deposits could become airborne in the process.

Spray the EGR valve cleaner onto the carbon deposits

. Remove the carbon buildup with the use of a pipe cleaning brush and dull scraper.

What happens if EGR valve is blocked?

If the EGR valve clogs or is completely being blocked off, it

can no longer re-burn harmful emissions inside of the combustion chamber

. The NOx emissions will flow unregulated through the combustion chamber and out of the exhaust pipe. The excessive NOx emissions will show up during a smog test and cause failures.

Can a car run without an EGR valve?

It might affect the environment but it is not harmful to the engine

. Some people are running for more than 50k km without EGR. The EGR is disabled in all remapping.

How long does it take to change a EGR valve?

How long does an EGR valve replacement take? Looking once again at the averages delivered by our data, an EGR valve replacement should take

around 3/4 of an hour.

What causes EGR valve failure?

The failure of the EGR valve on the vehicle is not out of the ordinary, as this issue can arise on most modern diesel engines. The failures are usually caused by

a build-up of deposits in the EGR valve over a period of time that causes them

to stick.