ECU problems
ECU: Engine Control Unit. It regulates all the aspects related to the engine's proper functioning.
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Top problems
Pcm processor fault
2006 Volkswagen Passat Passat 1.9tdi 144000 miles
I got my codes read and pcm processor fault%2C boost preassure sensor and maf senor fault came up. Can anyone help with the pcm fault please
1 report
Mobilizer Active
2006 Volkswagen Passat 2.0T Automatic Fuel 169650 miles
So i recently got this well used Passat 2006 2. Ot Fuel but the Immobilizer Active message display which wouldn't let the vehicle come on could drive a sane person insane. I notice this becomes very intermittent during the day time when the weather is high as it rarely happens in the mornings and evenings. A technician advises me to change ECU which i did , vehicle runs for 3 days displaying different incompatibility signs and finally parks up after 3 days. Now i am back to old ECU with very intermittent Mobilizer Active messages. Anyone has an idea how to manage this ?
Thanks to hearing back.
Thanks to hearing back.
17 reports
I have this same experience. Any resolution?
Me too my car gives the message immoblizer active in the hot weather and it doesn't run until i open all doors and wait for the car to become cooler. I don't know how to fix it.
At first it only happened to me during the day when Passat is left out in the sun. Now it happens all the time despite the time of day, even when it’s cool out. Only way to start it is to disconnect the battery for at least 15mins. Reconnect battery and it starts without any issues. I now carry a 10mm socket just for that purpose.
CommentEmergency mode
2004 Volkswagen Passat 3BG 1.9TDI 223693 miles
Automatic gearbox, whenever you give it too much gas when it wants to shift, it enables emergency mode, and limps. Only way to “fix” it, is to restart the engine. Bought new gearboxes, turbos, injectors and nothing works. Ecu also doesnt show any errors.
1 report
Car won't start
2008 Volkswagen Passat 2.0t FSI bpy 195000 miles
ECU won't wake up with ignition. The ECU fuse in engine compartment reads7.5 volts
Car failed to start.
2007 Volkswagen Passat Passat B6 2.0FSI 52816 miles
While scan with OBDII, showing error in communication with the ecu. The engine cranked but couldn't start.
2 reports
Car won’t start
2013 Volkswagen Passat Saloon 102000 miles
Suspect ECU problem and cart does not start
1 report
Emissions light
2002 Volkswagen Passat Saloon.1. 6 140000 miles
Emissions light is on my 02 Passat Car is fine on idle is not great in morning time the rest of the day the speed is no problem responses after 3000 revs is good for a 1.6... should i have a ECU... checked for faults...
4 reports
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