How Do I Fix Error 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.

What causes P0401?

Code P0401 is triggered when

the EGR temperature sensor does not see enough of a temperature change when the EGR is commanded to open

. These sensors tend to get a lot of carbon buildup that causes them to lose sensitivity to the heat from the EGR gases.

What causes EGR code?

EGR valves can

malfunction by becoming stuck open or closed due to carbon buildup

. … This is likely due to faulty or clogged EGR valve or carbon buildup in the intake manifold or on the EGR temperature sensor.

How do you fix a EGR flow malfunction?

1. Replacing the EGR valve.
2. Replacing a broken vacuum line to the EGR valve.
3. Replacing an EGR temperature sensor or cleaning the carbon off of it to repair it.
4. Cleaning carbon out of EGR tubes to intake manifold.

How do you fix insufficient air flow?

1. Use vacuum pump to open the EGR valve while monitoring the DPFE voltage and RPM engine.
2. Clean the EGR valve and tubing to remove the deposits.

Can I drive my car 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.

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 much does it cost to fix P0401?

Code P0401 warns of problems with your EGR system, from a faulty valve to a dirty temperature sensor. The severity of the problem varies depending on the extent of the components affected. Total repair costs range from

$150 to $750

, inclusive of labor and parts.

How much does it cost to replace the EGR valve?

The average cost for an EGR Valve Replacement is

between $314 and $399

but can vary from car to car.

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.

Should I clean or replace EGR valve?

If your car is running fine at idle and you don't have a check engine light,

there's no need to replace or clean an EGR valve

. Some shops recommend periodic cleaning. … If the valve is stuck open due to carbon, rather than the money to clean it, you're better off having the shop install a new EGR valve.

What are the symptoms of a faulty EGR valve?

• Your engine has a rough idle. …
• Your car has poor performance. …
• You have increased fuel consumption. …
• Your car frequently stalls when idling. …
• You can smell fuel. …
• Your engine management light stays on. …
• Your car produces more emissions. …
• You hear knocking noises coming from the engine.

What is an EGR flow malfunction?

The Exhaust Gas Recirculation (EGR) system is a part of the vehicle emission control. … The code P0400 is set when the EGR system flow is less than expected. In most cases, this happens when

carbon deposits (soot) clog up the EGR system passages and tubes

.

Will bad EGR cause engine damage?

A

faulty EGR valve can damage the EGR solenoid

that can, in turn, cause performance issues of the engine. The engine check light would turn on then, and then the engine might knock and ping.

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 can you tell if the 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.