Question about 2001 Volkswagen Eurovan

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Sharan why does my 2001 tdi sharan keep going into limp mode

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  • Anonymous Jan 05, 2009

    my 2004 goes into limp mode after 2600 rpm. code is a P0234 and i have already replaced the N75 valve. This didnt fix the problem

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Try removing and cleaning the EGR valve with terpentine. It tends to build up some soot in there.

Good luck,
NorwegianGuy

Posted on Jul 08, 2009

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Try topping up the oil. My zafira always did this when the oil was low

Posted on Apr 05, 2009

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Check all the small pipes that supply boost pressure to the waste gate valve. I had a similar problem with a 2.5 TDI Transporter in Australia. I had a pipe worn right through.

Cheers, Dennis

Posted on Feb 01, 2009

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Hi there well done for a great job right my vw sharan 2001 tdi curently is not heating and the water from the engine is not hot when you touch on the pipes they are just warm however the heater gage...


First time you might check the thermostat operating.


Heed of antifreeze coolant temperature!!!


The thermostat location for 2001 VW Sharan 1.9 TDI is on back of the alternator at the bottom side of the bracket.

IMPORTANT NOTE: It is NOT necessary to replace the alternator if you want to change the thermostat !!!

Thermostat checking:
1. Cold engine. Start up the engine and watch of the water temp indicator. After first value 60 Celsius Degree you still warm up the engine until the lifter (pointer) reach 80 C deg. (second mark after 60 C deg.). At this time you let engine running at idle speed and check with your hand the thermostat plastic housing and hose temperature in bottom left side of the engine. Heed of alternator driving belt and ventilator fan !!!
2. If the thermostat is good the hose must be cold until the water temp indicator reach almost 90 C deg.
3. The thermostat opening temperature is 87 C deg.
4. If the hose is already warm the thermostat is out of order.

Thermostat location, Part number: 044121113, in german - "Kuehlregle" (Price around $25):
tdisline_211.jpg


Important note: Always replace the thermostat seal, position 7 in the above picture.


Please do rate my response. Thanks!


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http://www.myturbodiesel.com/1000q_how_to/multi/limpmodetdi.htm

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Your car goes in "limp mode"!!!
If you 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"
You must try follows if you are able to do this:
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 ("Fault code: P1557 - Turbo Boost pressure control exceeded") 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.
It is some work to do here, but after that you will be full satisfied! NO MORE "LIMP MODE"!!!

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