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L4-1.8L Turbo

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Code P0455 2004 Audi A4 2.0T
Hello - a P0455 indicates a large evaporative emissions leak. This problem code originates with the evaporative emissions system purge valve, which expects positive pressure flow from the evap emissions cannister - which captures fumes from the fuel tank primarily....
Question
Rich idle only, negative STFT
Some common causes of too much fuel being delivered in a situation like that you describe are: a faulty coolant temperature sensor (the temperature signal is a part determinant of injector pulse width); leaking fuel injector(s) allowing too much fuel...
Question
Hello my gears shift on my 2002 Volkswagen Jetta and it sounds terrible. what does that mean exactly ?
Hi Dyani. Thanks for contacting us today. It really depends on what type of noise is being produced when shifting which will determine the root source or cause of the noise. If it's a grinding noise when your automatic transmission...
Question
White smoke out tailpipe.
If there was oil splattered all over the bottom of the vehicle, there is a good chance that the smoke you are seeing may just be excess oil that is being burnt off of the hot motor and exhaust. To...
Question
Wheels alignment
Hello. I'll be glad to help you with this. On a straightaway, at speed, with no significant crown on the road, if the car is properly aligned, you should be able to remove your hands from the wheel and the...
Question
Sunroof is not closing
Hello, if you don't hear the motor even try to work, you may want to check the fuses. If you hear the motor and it moves in small increments, you may want to try closing the sunroof by activating the...
Question
steering wheel noise
The shaking could be your tie rods. There are two sets of tie rods on your vehicle. The two inner tie rods and two outer tie rods. The outer tie rods are easily replaced but require the car to be...
Question
Radio not working
It is possible that a fuse may have blown. I have experienced this situation several times with Volkswagen cars over the years. I would ask for help from one of the mechanics at YourMechanic. They can come to you and...
Question
Oil and coolant leak
Hi. Your vehicle can be leaking from numerous locations. I would start by performing a pressure test on the cooling system. This test uses a dedicated tool to pressurize the cooling system and pinpoint the leak. To address the oil...
Question
Not going into gear
Ensure that your brake lights are working; the brake light switch may be inoperative, causing the shift interlock from working. You may also have shifter issues. From there, further diagnosis would be required. I would suggest having a qualified technician,...
Question
Jerking reaction when accelerating
This may be a sign of a dirty or failing mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected...
Question
Intermittent starting problem
Hi there, is the Check Engine light on? This helps with diagnosing the issue and would help point to a cause. There are multiple things that could be happening, so have a certified technician diagnose your starting issue further to...
Question
Engine not cranking.
The starter may be defective or the ignition switch may be the issue. The system would need to be checked by a qualified mechanic to trace the problem down.
Question
Engine light came on
The "Check Engine Light" indicates a fault being stored in the engine computer. A triangle shaped light with a circle around it indicates a fault in the electronic stability control. To diagnose these issues the faults will need to be...
Question
Cooling fans not working
If your cooling fan is inoperative, I would start by having a mechanic check the fan for power. If the fan is getting twelve volts but does not work, the fan is faulty. If the fan is not getting battery...
Question
Coolant leaking from car
Just in front of the right front tire there is an auxiliary radiator that has an air scoop that directs air towards it to increase the cooling capacity of the cooling system. It is possible that road debris may have...
Question
Car won't pass smog.
Hello! I will be happy to assist you. On your particular vehicle, random misfires are commonly caused by things such as low fuel pressure, a faulty oxygen sensor, bad vacuum lines, or faulty air flow sensors; a broken or loose...
Question
Car overheated and then shut down
Hello. Though there are many places that coolant can leak on this vehicle. The most common cause of a fast leak is a failing water pump or a crack in the radiator. I have also seen a lot of coolant...
Question
Car is not going into reverse.
Hi there. If your shifter will go into every gear except for reverse then you either have a bad synchronizer in the transmission or you have a shifter assembly failure. If the shifter will go into reverse with the engine...
Question
Car idles and dies
It sounds like you are having a problem with one of the sensors on the engine. It is common for a malfunctioning sensor to let an engine start, but once the throttle is applied, the engine will stall because it...

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