Have a helper hold the stopper against the gas filler neck. What does a diagnostic reading P0477 mean? Can anyone shed any updated new information on this?? If the damage is quite severe, I suggest you put down your repair tools and start looking around for a replacement choke plate to avoid a repeat of this nasty episode. Spoke with two dealer about the problem. Instead, make sure that you take your vehicle to a mechanic for proper repair and diagnosis. What do we know about P0477 code? Many scan tools have enough information about this error code built-in from their online access, giving you the capability to diagnose the problem within minutes.
Remember the Germans invented the Internal Combustion engine and deserve credit when due, and it is. The code simply indicates the evaporative system is not able to pull the fuel tank pressure down to 0. The exhaust flap is an emissions component. Try to test around critical leak points, depending on the manufacturer of the vehicle. So you tighten the cap, delete the code and send the customer on his way. . The dealer I purchased car through and has done complimentary service leaves much to be desired in service department aspect.
I thought I read somewhere that doing so is dangerous? Called the dealer in northern Ohio and now we'll see how things go. Common mistakes when diagnosing the P0471 code One of the common mistakes when technicians diagnose the P0471 code is believing that it is an exhaust gas recirculation code. The following are some of the repairs that a mechanic can make to help fix the P0471 code. All you need to do is get the code, and scan through their database for more details. This can be due to cracked hoses or parts like the canister or an area in the car that has been damaged by rust, such as the fuel filler neck or the gas tank. Testing is done either once or twice a day, as long as a long list of requirements are met.
If the reed switch didn't open, then that means it's still trying to pressurize the system. This will usually fix the error code P0455. We only do what is necessary and always get your approval before starting service. Everyone in between can use their smoke machine and dye for a very hairy situation. Some scan tools have all this information built in. Decided I would stay away if at all possible.
Please join the Roadfly Facebook Group where members will be more than happy to answer your questions and provide help. You can find a set of vacuum hoses that run off the intake manifold to controller there. The high end diagnostician can whip out the emissions analyzer. I don't know if this is true. The internal seal in the waterpump gives way and allows coolant antifreeze to enter the vacuum system. This is generally monitored in turbocharged vehicles, and those vehicles that have diesel engines. What does fault code P0477 mean? The soapy water idea sounds logical to me! Used simple green as the cleaner and used Dupont teflon spray lube.
Sometimes the fuel level of the tank can prevent a leak from being seen. In some cases, there might be a simple fix such as correcting a low fluid level, tightening your gas cap or cleaning a sensor , while in other cases your Mercedes may require additional service or repairs. The sticking or binding of these flaps then binds the motor which causes the check engine light and or a sever loss of acceleration. As stated above try some penetrating oil spray. As stated above try some penetrating oil spray.
To be quick, accurate and avoid comebacks, you should run the smoke for the full 5-minute cycle if the source of the smoke is hidden and requires disassembly. What the P0471 code means If the P0471 code appears, it means that the powertrain control module has detected that there is a voltage reading from the exhaust system back pressure sensor circuit that is out of the normal range. Most of the time it does not need to be replaced. Fuel vapors are sent to the charcoal canisters through the hoses for storage. If that's indeed the part, then it seems to be easy to replace it myself. If the first test passes, the second test is cancelled.
What Does This Mercedes Fault Code Mean? The technician replaced the fuel cap and it came back. If this is the case, the first step is to visually check the fuel cap seal to make sure the fuel cap is fitting correctly. I prefer to listen to that low growl. I'm unaware of a reed switch. Is there any way I can find out the part number or any recommended place to buy one online refurb is fine? Can anyone shed any updated new information on this?? As the vehicle is driven the vacuum is so powerful it pulls coolant antifreeeze deeper into the vacuum system causing havoc on the entire vacuum system. You can then print out any necessary information and take it to the vehicle to do tests.
JimLev, those are good ideas, I haven't checked on the filler neck side for air leaks. The diagnostic pump pressurizes the fuel system to check for leaks. Don Thanks Don, very much appreciate the assistance in this. Is it still working as it should? If they do, then the mechanic knows that there is an actual problem with the vehicle. What are the symptoms of the P0471 code? Although my car is 09, it's already passed the mileage limit so factory warranty had expired. You should also check that the spark plug gap is set properly.
The pump is silent due to it using diaphrams to build up pressure so you really wouldn't be able to hear it. If not, then you either replace it or repair it. To start viewing messages, select the forum that you want to visit from the selection below. It's the easiest and cheapest to fix. Aren't emissions components covered under a separate warranty? Probably more than you wanted to know. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing. But sometimes, this location is hard to get to or see, like the top of the tank, or under a shield.