Engine management light flashing and power in limp mode

Its either the ECU has gone into "limp" mode or yopu have a problem with a sensor. Make sure the oil, water and battery voltage are all correct. If the turbo hose has a split in it there will be no boost and the ECU will shut down Check all you can before replacing anything.

did you use the interface to cancel limp mode
you know its in limp mode

what was the printout of the diag

its aok to post i have a problem and this is the issues
but in limp mode you have no choice but too use software too fix the ecu etc to reset the mode fault etc

i think its the cold start system with air has an issue

if the glow plug light is flashing and the glow plugs are ok then its a sensor problem and a needed reset of the mcu to clear the error and retest...

from cold...!!

warm engine is prob aok
something air related

Does the yellow engine management light come on during this? If so you should get someone to check the fault codes as there are several reasons for limp moding.fuel lines , electrical system, low oil pressure, overheat issues etc.OD11 testing will save you lots of time and give you a direction of where to put things right.

the limp mode is a pre-set condition in the CPU program that when certain sensors that report to the ECM are sent out of set parameters, the readings being received by the ECM and compared with the CPU program make the ECM choose a new program in the CPU which reduces power, speed and will stop the engine if the parameters diversion is serious enough. The limp mode is designed to allow you to move the vehicle to a place of safety and not to be driven endlessly. The parameters are in sensors that control aspects of the engine management ( over heating, no oil ,no oil pressure, fluctuating position sensors, etc and in the automatic transmission ( overheating oil, VSS problems ,TCM problems, oil pressure etc ). BY going into limp mode it is trying to protect the engine and transmission for expensive damage and drawing your attention to failure/s that you are not aware of or have been ignoring ( overheating from coolant loss)

check the oil level in the sump, coolant level, coolant temperature (overheating), transmission oil level if auto. The limp mode is energised by any number of sensors that register a fault that is detrimental to the engine/ gear box. Run the fault codes and repair any faulty units . Reset the CPU with a scanner .

THe engine light si coming on because the CPU has found sensore that are outside set parameters (faulty) and the CPU sends the engine ,management system into limp home mode . That is why there is no power. Check oil level / water level in the radiator and temperature.

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.

Check immediately the turbocharger! DO NOT START THE ENGINE WITH THIS KIND OF PROBLEM!
Remove the air inlet axial center hose of the turbocharger, in other words the compressor air inlet hose. Then check axial & radial gaps of the turbocharger rotor.
Check also the turbocharger oil pressure supply. Check the engine oil level also.
Repair & replace bad pieces.
In the most cases the turbocharger is out of order when engine puffing off blue smoke and losing power.
If the car goes in "limp mode"!!!
After scan the EDC-15P engine control unit with a VAG or KTS -BOSCH diagnosis tool you will find this: Fault code: P1557-Turbo Boost pressure control exceeded
1. Engine stopped and ignition switch off. Check all pneumatic connections and hoses between turbocharger actuator = pressure unit for boost-pressure control, boost-pressure control solenoid valve, vacuum reservoir, EGR control solenoid valve, intake-manifold flap solenoid valve, EGR valve with throttle - part of intake manifold. Also the vacuum connection between tandem pump and brake booster. If you find something wrong replace parts. If not go to step 2.
2. Extract the hose of the turbocharger actuator = pressure unit for boost-pressure control part of turbocharger. Instead of the original hose you must place another 1 meter long hose with the same inside diameter, and then you check to inspire yourself the air from the other one extremity of this hose. The mechanical connecting rod of the turbocharger actuator must have a smooth and whole motion. If you can do that with your mouth, then you must replace the boost-pressure control solenoid valve. If you can not reach this with your mouth, then you go to step 3.
3. This is the most difficult work. The problem is that the soot particles deposits inside the turbocharger plugging the variable nozzle geometry mechanism = adjustable vanes of the turbine. If the turbocharger actuator is not able to adjust the turbine vanes the charge air pressure increase too much and ECU (engine control unit) go in "limp mode" = engine protection software. As a result the "limp mode" engine still running until you turn the engine off (ignition switch off) and back on when the "limp mode" is deactivated, but the fault still remain in ECU memory!
4. You must be able to extract the turbo from the engine and then to disassemble the turbocharger, clean inside adjustable vanes mechanism and refit all.

16619 -Engine boost condition - Limit not reached. Check intake hoses/ connections for leaks. Check Turbo charger waste gate regulating valve/ waste gate working correctly. Must move freely when accelerating, won't achieve full boost if waste gate sticking open. Check Turbo impeller turning freely, oil feed pipe for turbo can get blocked causing impeller to seize. Engine compact, not easy to access these components.

the car is going into limp mode due to an engine management fault. have to check what the fault is with a code reader. if the milage is high 100,000+ could be a turbo fault (overboosting), as this will put the car into limp mode.