What causes sudden loss of power on Passat TDI?
Loss of power on Passat TDi? Two nights ago while travelling home, the car suffered a sudden loss of power. The car still drives ok, no smoke so don’t think it’s a pipe from the turbo, and can still hear a whistle from the turbo so think that’s working ok.
Is the Audi Passat TDI still driving OK?
The car still drives ok, no smoke so don’t think it’s a pipe from the turbo, and can still hear a whistle from the turbo so think that’s working ok. Took it today to the garage I always use, they had a scan round the engine bay, but said everything looked ok, and to take it back on Monday for a more in depth look.
What does boost pressure do on a Passat?
Boost pressure regulation is normally related to turbo control, see the low power checklist and start working through it. Started working through from air filter onwards. Inlet Manifold flap open on inspection and appears to work normally. Tested by switching ignition on and off.
Why does my Volkswagen TDI go into limp mode?
This could be temporary or more permanent, depending on the cause. Two possible causes are computer-imposed “limp mode,” and the MAF sensor, which is just a small distance from the air cleaner. Limp mode is a safety function when the car computer detects a serious malfunction of some sort serious enough.
What causes a bad MAF on a VW?
If the engine check light is on, it may reset when the connector is disconnected and reconnected. One cause of a bad MAF is that you have used an aftermarket air cleaner that fails to keep oil residue away from it. Even a little residue will cause the sensor to fail. They are sensitive. The time to change a MAF is not longer than 30 min.
Can a bad MAF sensor cause loss of power?
A bad MAF sensor might produce a sudden reduction in car power, but the normal failure mode is a gradual loss of power over weeks. Your engine light may come on if the sensor only has intermittent failure. If power is restored by shutting the car off and turning it back on, you are in limp mode.
What causes a diesel car to lose power?
Volkswagen diesel cars such as the TDI can experience a loss of power. This could be temporary or more permanent, depending on the cause. Two possible causes are computer-imposed “limp mode,” and the MAF sensor, which is just a small distance from the air cleaner.
What causes a car to lose power after 70K miles?
The MAF (Mass Air Flow) Sensor. A bad or going-bad MAF can cause the loss of power. These are usually good to 70K miles. A bad MAF sensor might produce a sudden reduction in car power, but the normal failure mode is a gradual loss of power over weeks.