We recommend Torque Pro. When a gasoline or diesel-powered vehicle runs, the fuel in the cylinder along with the oxygen in the air burns extremely hot. The gases produced in the combustion chamber are expelled in the exhaust stroke and sent through the exhaust pipe, destined for the atmosphere.
The unburned fuel is carried along with the exhaust as it exits the engine. These hydrocarbons are a major component of vehicle emissions and contribute to environmental pollution that can cause smog and exacerbate breathing issues.
It is produced in a narrow range of temperatures at the upper limit of engine combustion. The exhaust gas recirculation EGR system was developed to address these issues. This achieves two things: completely burning the hydrocarbons in the exhaust gas as well as diluting the air in the combustion chamber to reduce ignition temperatures.
An EGR solenoid is used to meter the exhaust gases that are reintroduced into the engine. It also prevents the EGR system from operating until the engine is at operating temperature, otherwise the engine will run rough on startup as it starves for oxygen-rich air.
The EGR solenoid is typically mounted on the intake manifold. It uses engine vacuum to operate the EGR valve, which opens and closes to allow the exhaust gases into the intake.
It receives volt power from the powertrain control module when operating conditions — engine running and battery voltage above 12 volts — are met. Symptoms vary depending on the position of the EGR solenoid circuit during malfunction.
Symptoms may include:. The EGR solenoid can fail internally, either by cracking, spring failure, or otherwise. Usually if the EGR solenoid fails, it can easily be determined by removing the EGR solenoid and blowing air through the vacuum connections. When the EGR solenoid is removed, apply volt power and ground to the solenoid.
The vacuum passages should not be free-flowing. If you can blow through the valve, there is an internal failure and the EGR solenoid should be replaced. Another way to check for a failed EGR solenoid is to disconnect the vacuum hose to the EGR valve while the engine is running cold. There should not be a change in the engine operation.
If there is, it indicates a problem with the solenoid. DTC P most commonly indicates an electrical issue with the solenoid or the electrical connections.It sounds to me like an electrical issue to the EGR!? Or could the EGR be blocked or not functioning? Thank you in advance. I have the same fault code, probably on the same car 1.
I was adviced to check some fuses simplest possible error that gives this fault code according to some internetsoruceall fuses were ok. I read the instruction in your link, my scan tool can't to this at least not with the software i have any good advice on buying a scan tool for this car? You need to be a member in order to leave a comment.
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P0403 OBD-II Trouble Code: Exhaust Gas Recirculation Circuit Malfunction
P OBD Recommended Posts. Posted 21 September, Share this post Link to post Share on other sites.
P0403 VOLKSWAGEN - Exhaust Gas Recirculation Control Circuit
Posted 4 January, Hi, did you figure it out? Create an account or sign in to comment You need to be a member in order to leave a comment Create an account Sign up for a new account in our community. Register a new account.This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.
Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Disconnects and checks the EGR valve vacuum control solenoid for a short or open circuit in the solenoid. Failing to disconnect the connection to the EGR control solenoid to check the connection for a corrosion buildup that could cause an open circuit to the ECM that could set this code.
Failing to check the wiring harness for cut wires causing an open circuit before replacing a good solenoid. The Check Engine Light being on will cause the vehicle to fail emission testing and may cause the engine to ping on acceleration. When this happens, the ECM will turn off its control of the solenoid.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at With YourMechanic you can skip the auto shop altogether.
They send certified and screened mechanics straight to your door and enable you to save big on car repair and maintenance. Cost of diagnosing the P code. No more waiting rooms! Our mechanics will come to you to diagnose and fix the P code. Recent Check Engine Light is on Inspection reviews. Excellent Rating.
Average Rating 4. Number of Reviews 5, Rating Summary. Johnathon 8 years of experience. Request Johnathon.
Johnathon was on time and was very knowledgeable. Going to use in future. Travis 12 years of experience. Request Travis. Fair, honest, punctual, and knowledgeable.P is a very common trouble code. It is a generic code, which means that it has the same meaning for the Volkswagen Passat as it would any other vehicle. A circuit malfunction implies that there is a wiring problem coming to or from the EGR system.
That does not rule out the EGR solenoid itself. As far as the average do it yourselfer being able to diagnose the cause of this code, it can be tricky since a good vehicle scanner and Ohm-meter can make the job a heck of a lot easier.
Most of the time, there will be no noticeable symptoms accompanied with P, with the exception of the service engine soon light itself. While not typical for any other symptoms to show with the P, it is possible that the Passat will misfire if the EGR system is stuck open. The issues that are going to cause P are going to have to do with the EGR solenoid, or the wiring going to or from it. While it is possible for something else to cause P, these are far and away the most likely reasons for the code to populate.
The EGR solenoid itself is often the cause of P With the ohm meter hooked up, you should see movement on the gauge.Vw 2.0Tdi Wymiana zaworu Egr. VW EGR VALVE REPLACEMENT
They can get really dirty over the years. If you need a new EGR valve solenoid, they are relatively affordable at Amazon. Here are the most common issues:. Good luck diagnosing P in your Volkswagen Passat. If there is anything that you would like to add that could improve this article, please feel free to leave a comment or use the contact tab.
P Symptoms: Volkswagen Passat Most of the time, there will be no noticeable symptoms accompanied with P, with the exception of the service engine soon light itself. P Causes The issues that are going to cause P are going to have to do with the EGR solenoid, or the wiring going to or from it. Here are the most common issues: Harness Connector s — Due to the heat that the EGR solenoid connector has to deal with, they can often degrade as they age.
Make sure that the connection is still making good contact with the EGR solenoid. There are pins in the harness that need to make a solid connection. Water Damage — If the engine has been exposed to a decent amount of water, it can throw this code. Conclusion Good luck diagnosing P in your Volkswagen Passat.TDI s : I'm getting a P fault.
EGR actual is nowhere near specified. Actual is always higher. That EGR cooler valve deflects to full open and closed by visual inspection. Also, I ran engine with intake pipe off and the anti shutter valve had the same oscillation as the EGR cooler valve. Boost pressure are also higher than specified.
Ps Just did a timing belt, water pump, tensioner, ideler pully, serpintine belt, air filter, Fuel filter was black as hell, normal? Any help or suggestions would be greatly appreciated. Well, there's no shortage of P threads. Are my symptoms that unique?
What drives the EGR regulator on the intake? I took a peek inside the intake and it's just too dark and oily to really tell if its too dirty. Definetly not clogged. I plan to remove the EGR regulator and clean it up. Any tips on removing and reinstalling he EGR regulator? Can I reuse gaskets? What does it entail? Remove anti shutter valve 3 bolts and connectorthen remove EGR regulator 3 bolts and connector?
Most folks remove and clean the EGR. If problem persists, they replace it. Stared a new thread here Thread Tools. All times are GMT The time now is TDI Club Cards.
Volkswagen Passat P0403:EGR→ Circuit Malfunction
TDIFest Gone, but not forgotten. VAG-Com List. Unit Conversions. TDIClub Chat. Thank You. User Name. Remember Me? Mark Forums Read. December 15th, Send a private message to Lmannyr. Find More Posts by Lmannyr.On our Golf TDi a flashing glow plug light meant that the brake pedal proximity switch was out of range. A simple and cheap fix. No, car felt perfectly normal. We decided to pull over when it was safe on a single carriageway part of the A1 at the time but spotted after we had braked the light went out.
We did not have the handbook with us so carried on. Another 10 miles or so down the road glow plug light on again, touch the brake pedal and off it goes. Carried on like this until we got home. Then read the handbook, "if the glowplug light illumiinates when driving stop ASAP and call for assistance", whoops. So I phoned the garage on Monday who said it was safe to carry on driving and booked it in. They reset the pedal sensor thingy and all was fine.
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What is the Fuel Calculator? Compare two cars to find the lowest fuel cost. Search the forum. View Threaded. Thu 26 Jan Reply Report as offensive Link. Thu 9 Feb Related questions. Why won't the dealer contribute to the cost of repairing the catalytic converter on my cheap Ford Fiesta? Someone had part-exchanged it, although it came with a new MoT, two new tyres and exhaust. The MoT was obtained My Mini's catalytic converter failed - would BMW contribute to replacing it?
I have a BMW Mini with 40, miles on the clock. Towards the back end of last year, it developed a rattle which was subsequently identified as the catalytic convertor substrate failing. BMW quotedVolkswagen Passat P if your catalytic convertor fails completely, you eventually won't be able to keep the car running.
Your gas mileage will also be terrible, so you should try and fix it as soon as you can. So you should chech it on our car models. Disconnected, dirty or fouled spark plugs are common causes for engines that won't start.
Spark plugs typically need to be replaced every season or 25 hours of use. You should also check that the spark plug gap is set properly. If your spark plugs look good, problems with your ignition system can also preventing a spark. These can range from a faulty spark plug lead, shorted kill switch or flywheel key damage. Parts or components should not be replaced with reference to only a P DTC.
The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.
Code Search Please fill the "Code Box" to find engine fault code. Ways to read engine trouble codes. Ways to clear check engine light on car panel. Check Engine Light Dictionary Ways to clear check engine light on car panel. Main engine trouble code archive on Web. Copyright EngineTroubleCode. Check engine light comes on Engine stalling or misfiring Engine performance issues Car not starting. If one of these reasons for P code is occuring now you should check P repair processes. Now don't ask yourself; What should you do with P code?
The solution is here :. Dependin P code.