How serious is a P0401 fault code?
A P0401 diagnostic trouble code is considered a moderately serious issue. A defective EGR valve creates excessive ignition/pre-ignition that can cause internal engine damage to the valves and piston. The P0401 code is triggered because of blockages in the EGR system or faulty EGR valves. The vehicle’s onboard diagnostic system stores trouble codes when the EGR is malfunctioning because the vehicle will create excessive Nitrogen Oxide emissions and won’t pass emissions standards.While it’s typically safe to drive with a P0401 code, it is recommended to address it as soon as possible. Prolonged driving with an insufficient EGR flow can contribute to increased emissions, reduced fuel economy and, in some cases, lead to engine overheating or knocking, especially under high load conditions.Although the code does not necessarily reveal the exact cause of an EGR malfunction, it can guide you to where you can begin diagnosing the problem. Some of the most common issues that cause a P0401 code are: Restricted or clogged EGR tubes. Carbon buildup on the EGR temperature sensor.In plain English, the P0401 code means that not enough exhaust gases are flowing through the low-pressure EGR system.
How much does it cost to fix P0401?
What is the cost to resolve a P0401 code? Repair cost will vary across make and model. EGR valves come as either mechanical or electric with the former in the $100 to $150 and the latter in the $250 to $300 range. Sensors will be lower in the $50 to $75. On average, EGR valve replacement times can range from 1 hour to 3 hours with an average of 1. The time that the job takes will depend on a number of factors, like your vehicle’s make and model, year, as well as other factors.The average cost for an EGR Valve Replacement is between $432 and $579. Labor costs are estimated between $151 and $221 while parts are priced between $281 and $358. This range does not include taxes and fees, and does not factor in your unique location.When an EGR valve fails, it can sometimes be cleaned and reused. However, installing a new one is often a better solution that provides peace of mind that it’s working properly. Parts normally can range from under $50 to $1,000 or more, but you can expect an average price of under $100.You can even experience engine knock or detonation inside the combustion chamber, which damages the engine and will reduce its lifespan. Generally, an EGR valve has a lifespan of about 10 years or 100,000 miles, whichever comes first. Regular cleaning every 50,000 miles or so will extend that lifespan.Replacing the EGR Valve: If the EGR valve is damaged or severely clogged, cleaning may not fully restore its function. In this case, replacing it with an OEM or high-performance EGR valve is recommended.
Is it expensive to fix a P0401 code?
P0401 Repair Costs 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. A professional EGR clean in the UK typically costs £100 to £180, depending on your car and the garage. By comparison, replacing an EGR valve can cost between £180 and over £500, once you include parts and labour.
Can a map sensor cause a P0401 code?
A defective MAP Sensor can cause a lot of issues like displaying P0401 code. Cleaning a dirty MAP sensor can only do so much. If the sensor is too far gone, there’s no other solution but to replace it with a new one.
How do I fix my P0401 code?
Inspect the EGR valve and tubing, then clean to remove any deposits. Check the voltage at the DPFE and compare to standard values listen in your owner’s manual. Swap out the DPFE sensor, preferably with a high-quality or OEM model. Replace the EGR valve if the problem persists. Scope of required work While it is possible to replace an EGR valve on some vehicles in well under an hour, replacing an EGR valve on some other vehicles could take several hours due to the inaccessibility of some EGR valves.Luckily, fixing the EGR valve is easy enough. EGR valves either become stuck in the open position or stuck in the closed position, so once you’ve figured out which problem plagues your own truck, you can get on with the rest. Closed Position: This means that the EGR valve is stuck shut and refuses to open.Discover how an EGR valve functions and how to replace one. If you’ve never done an EGR valve replacement, have no fear. It’s a fairly straightforward job any DIY mechanic can tackle using a few basic hand tools.It might be safe for a short period, but prolonged driving with a faulty EGR valve can impact engine performance and emissions. It’s best to address the issue promptly.Remove the fastening screws and check the valve for damage, corrosion or carbon build-up. Clean the EGR valve mounting surface thoroughly and fit new valve and gasket. Remove any loose carbon from the EGR supply port too. Line up the EGR valve with the bolt holes and gasket and reattach to the housing.