Hi everyone,
I am having a persistent issue with my Seat Leon 5F8 2.0 TDI (engine code: CUNA).
It all started with the fault code P008700 (Fuel Rail/System Pressure - Too Low). The car was still drivable for a short distance. After a while, that code disappeared and was replaced by P307300 (Fuel Pump Contact Circuit) and P062700 (Fuel Pump "A" Control Circuit / Open).
To fix this, I have already replaced:
The low-pressure fuel pump (in-tank pump)
The fuel pump control module
I have checked all the fuses and wiring, and everything is intact and healthy. The fault codes are now gone, but the problem is that no fuel is coming from the tank to the fuel filter.
When I try to prime/bleed the fuel system using an OBD11 diagnostic tool, it fails and gives the error "marginal conditions not met".
The battery is fully charged and connected to a charger.
The hood/bonnet is completely closed.
What could be causing this? Does the new fuel pump module require component protection removal or specific coding/adaptation? Or am I missing some specific conditions for the OBD priming sequence to start?
Any help or advice would be highly appreciated!
I am having a persistent issue with my Seat Leon 5F8 2.0 TDI (engine code: CUNA).
It all started with the fault code P008700 (Fuel Rail/System Pressure - Too Low). The car was still drivable for a short distance. After a while, that code disappeared and was replaced by P307300 (Fuel Pump Contact Circuit) and P062700 (Fuel Pump "A" Control Circuit / Open).
To fix this, I have already replaced:
The low-pressure fuel pump (in-tank pump)
The fuel pump control module
I have checked all the fuses and wiring, and everything is intact and healthy. The fault codes are now gone, but the problem is that no fuel is coming from the tank to the fuel filter.
When I try to prime/bleed the fuel system using an OBD11 diagnostic tool, it fails and gives the error "marginal conditions not met".
The battery is fully charged and connected to a charger.
The hood/bonnet is completely closed.
What could be causing this? Does the new fuel pump module require component protection removal or specific coding/adaptation? Or am I missing some specific conditions for the OBD priming sequence to start?
Any help or advice would be highly appreciated!
