Passat 2006 2.0 tdi 140 engine won't start dash warning says either "engine fault, garage" or "low oil pressure".

hi mate, my 55 plate passat did the same before major problems happened. first turbo went then the oil pressure light came on and the car went into limp mode. before its too late for you and a costly bill can you do the following.
check if your car has a recall for the injector problems which vw are replacing under warenty.
second thing the guy who repaired my turbo told me that these cares have a major fault which caused the turbo to go. the fault is the oil pump failure you must adress this issue as you can get a lot of info on the discussion forms.
my car started with the same problem as you have described the pd engines have a design fault with the oil pump and shaft. this is common causing your turbo to go then the car will start showing oil pressure low please stop engine. educate your self via the forms and act quickly befor you end up with massive bills.
i hope this has helped. trust me vw know about this design fault.you need to change your chain driven oil pump to the new gear driven system which vw have modified. all vag cars have the same problems be it audi skoda vw . my car had the same problem as you have said .started off with emissions then turbo failed thats when i started to investigate this problem . the pd engines was designed by some rookie at vw.

Low oil pressure or damaged/worn parts.

P1040 VOLKSWAGEN - Injector 1 Supply Voltage Circuit Malfunction

Symptoms:
- Engine Light ON (or Service Engine Soon Warning Light)

Possible causes:
- Injector 1 circuit open or shorted
- Injector 1 circuit poor electrical connection
- Faulty injector 1

Test it and keep us updated.

STOP the engine immediately !!! There is an oil pump failure of 2.0 TDI engines !
Remove the oil pan and the oil pump & balancer shafts assembly.


Either the shaft driving the pump from the balance shaft rounds off or the balance shaft drive gears eat themselves.
The same issue ... low oil pressure warning light, noisy rattling engine, and the turbo has gone. Diagnosis: oil pump balancer shaft assembly ...



Many Passat show excess chain noise and wear anywhere from 50,000-100,000+ miles. Cars have broken the chains/tensioner as low as 65,000 miles. This is just a range of cars that have been reported, diagnosed, and repaired. The actual statistics on dealer repairs or failures is unknown and I've heard cars over 100,000 miles that, in my opinion as a non mechanic (most mechanics wouldn't recognize this sound and problem either), aren't noisy. From what has been reported, noticeable noise/chain-tensioner wear/greater risk of breaking is around 60,000-150,000 miles. Your case may vary. The most obvious symptom is a rattling loose noise from the oil pan. Unless you listen to a Passat TDI with a tight chain and one with a loose chain, it's hard to describe the difference other than rattling chain noise.
The reason the gear drive oil pump modification was started is because a few mechanics who specialize in TDI have seen many worn oil pump chains/sprockets/tensioners. There will always be a few defective parts that come off the assembly line and all mechanical components like chains wear out sooner or later, but in my opinion, the failure rate is abnormal considering the number of Passat TDI sold versus the number of reported oil pump failures. This does not necessarily mean that every or even most Passat TDI will have this problem, just that the reported failure rate is high enough to consider this part a design failure. Nobody, not even VW-Audi knows the average time between failure for these parts and the percentage of cars that will have this problem, but they changed this design and if you want to not have this specific failure, the only sure way is to swap to the geared module.

You need the codes pulled form the vehicles ECU with a scanner. The TDI engine does not do this when running correctly.

There are a number of reasons I can think of why this might happen, some being, Glow Plug/s failure, injection pump problem, such as temperature sensor failed, fuel system air leaks and alternator charging problems..

The alternator has a one way drive pulley that fails often causing unstable idle and belt noise..

Low power indicates the engine is in limp mode needing attention.

Find a garage with a scanner for this VW and allow them to check the vehicle.

I don't mind helping, but have you had it scanned for codes? If so, what are they and are you nioticing any other symptoms?

If I don't start my touran,on the screen Stop Engine oil pressure .What should i do?

some lose connection at dashboard instrument cluster -ve earthing point is lose, so it is happening , or any socket is lose.

this could be due to a large variety of possible different faults, the only way to tell is to take to a garage for it to be plugged in to a diagnostic code reader. Not always serious, somtimes as simple as an engine coolant temperature sensor fault, cheap to buy and quick to replace.

If light is on at start up its usually a glow plug gone .Won't make any differance to driving. You should get a diagnostic scan done which will tell you which plug is at fault.