skoda fabia II combi (545) 1,2 TDI tænder forvarmnings varsel under længerevarende kørsel på motorvej. jeg har udlæst fejkode P0234 på en Delphi/wow tester . Wastegate ventilen er ok , den kan bevæge sig . Trykreguleringsventil /N75 er skiftet og fungere. Vakum er testet og der er ikke lækager .

Nu koncentrere jeg mig så om turbo tryk føleren ,, MAP sensoren ,,,,, kan nogen vise på et billede eller en skitse hvor jeg finder denne og hvilke værdier jeg skal udlæse fra denne . er der ellers nogen der har andre ideer til hvad der er galt .

EGR ventiler taget ud af drift elektronisk . EGR /Delete .

Fejlkode P0234 på en Skoda Fabia (og andre biler fra VAG-gruppen) betyder:

P0234 - Turbo/Supercharger Overboost Condition

Betydning

Fejlkoden P0234 opstår, når motorens styringssystem registrerer, at turboladeren producerer for højt ladetryk ("overboost") i forhold til de forventede værdier. Dette kan give motorbeskyttelse og føre til nedsat motorkraft (ofte kaldet "nødprogram").

Almindelige Årsager

1. Defekt/Slidt wastgate-ventil
   Wastegaten regulerer trykket. Hvis den sætter sig fast, kan trykket blive for højt.

2. Fejl i trykreguleringsventil/N75-ventil
   Hvis denne ventil ikke fungerer korrekt, kan turbotrykket ikke reguleres.

3. Slangeproblemer (vakuum/tryk)
   Utætheder eller løse slanger til turboens styring kan give fejl.

 

4. Defekt turbotrykføler (MAP sensor)
   Hvis sensoren måler forkert, kan ECU tro, trykket er for højt.

5. Opgraderet/Chippet motor
   Hvis bilen er tunet, kan det medføre mere turbo-tryk end fabriksindstillingerne tillader.

Mulige Løsninger

• Tjek og udskift vakuumslanger

• Test/udskift N75-ventil

• Tjek og rens/udskift wastegate

• Test MAP-sensoren

• Kontroller for uautoriseret tuning

Hi @jorgni

unfortunately the above post will need to be translated to english in order to get any help or response. if you could do that, just post it as a reply below, you will get much more help.

5 hours ago, jorgni said:

Skoda Fabia II Combi (545) 1.2 TDI turns on the preheating warning during long-term driving on the motorway. I have read out the fault code P0234 on a Delphi/WOW tester. The wastegate valve is ok, it can move. The pressure control valve /N75 has been replaced and works. Vacuum has been tested and there are no leaks.

Now I'm concentrating on the turbo pressure sensor, the MAP sensor, can someone show me a picture or a sketch where I can find this and what values I should read from it? Does anyone else have any other ideas as to what's wrong?

EGR valves taken out of service electronically. EGR /Delete.

Error code P0234 on a Skoda Fabia (and other cars from the VAG group) means:

P0234 - Turbo/Supercharger Overboost Condition

Importance

The P0234 fault code occurs when the engine management system detects that the turbocharger is producing too much boost pressure ("overboost") compared to expected values. This can provide engine protection and lead to reduced engine power (often called "emergency program").

Common Causes

1. Defective/worn wastegate valve
   The wastegate regulates the pressure. If it gets stuck, the pressure can become too high.

2. Pressure control valve/N75 valve fault
   If this valve is not working properly, the turbo pressure cannot be regulated.

3. Hose problems (vacuum/pressure)
   Leaks or loose hoses to the turbo control can cause errors.

 

4. Defective turbo pressure sensor (MAP sensor)
   If the sensor measures incorrectly, the ECU may think the pressure is too high.

5. Upgraded/Chipped engine
   If the car is tuned, it may result in more turbo pressure than the factory settings allow.

Possible Solutions

• Check and replace vacuum hoses

• Test/replace N75 valve

• Check and clean/replace wastegate

• Test MAP sensors

• Check for unauthorized tuning

Translated by google

Alasdair

May be the actuator is sticking sometimes. Used to do it on my old 1.9tdi. Not often but random limp mode. I sprayed it with oil etc and manually operated it until it felt smooth again. Not sure what turbo you have but another point may be sticking vanes in the turbo if its a variable vane one. Try some turbo cleaner additive to tank and see if it helps.

Alasdair