2.2 tdci euro 5 P0148, P2539

[Pavlisk]

Hi, does anyone have experience with DTC P0148 Fuel Delivery Error and P2539 Low Pressure Fuel System Sensor Circuit ?
I have a Mk8 fwd 2015 2.2 92kw euro 5 mileage 226k km.
A blocked fuel filter will appear on the display. The car runs normally, no limp mode. Only at idle does the rpm sometimes fluctuate slightly and fuel consumption seems to me to be higher.
I replaced the fuel filter with brand Mann-Filter about 800km ago.

I will be glad for any advice. Thank you.

===PCM DTC P0148:00-2C===
Code: P0148 - Fuel Delivery Error

Status:
- DTC Maturing - Intermittent at Time of Request
- Malfunction Indicator Lamp is Off for this DTC

Module: Powertrain Control Module

Freeze Frame #1:
-EVENT_TIME: 325570669 s (Mon Aug 11 14:29:40 2025) - Event time
-TOTAL_DISTANCE: 227003 km - Total Distance
-MODULE_VOLTAGE: 14.5 V - Control Module Voltage
-OUTDOOR_TEMPERATURE: 31 °C - Outside temperature
-PWR_MODE_KEY: Running - Power Mode Key State
-PWR_MODE_QF: Power Mode OK - Power Mode Quality Factor
-LOAD: 63.14 % - Calculated Load Value
-ECT: 74 °C - Engine coolant temperature
-MAP: 167.0 kPa - Manifold absolute pressure sensor
-RPM: 1534 1/min - Engine Revolutions Per Minute
-VSS: 38.0 km/h - Vehicle Speed
-IAT: 36 °C - Intake Air Temperature
-MAF: 51.21 g/s - Mass Air Flow
-TP: 93.33 % - Throttle Position
-RUNTM: 326 s - Time Since Engine Start
-FRP: 111560.0 kPa - Fuel Rail Pressure
-EGR_PCT: 0.00 % - Commanded EGR
-BARO: 100.0 kPa - Barometric pressure
-CATEMP11: 221 °C - Catalyst Temperature Bank 1, Sensor 1
-CATEMP12: 236 °C - Catalyst Temperature Bank 1, Sensor 2
-APP_D: 59.61 % - Accelerator Pedal Position D
-APP_E: 60.00 % - Accelerator Pedal Position E
-TAC_PCT: 0.00 % - Commanded Throttle Actuator Control

===END PCM===

===PCM DTC P2539:00-2C===
Code: P2539 - Low Pressure Fuel System Sensor Circuit

Status:
- DTC Maturing - Intermittent at Time of Request
- Malfunction Indicator Lamp is Off for this DTC

Module: Powertrain Control Module

Freeze Frame #1:
-EVENT_TIME: 325216394 s (Thu Aug 7 12:05:05 2025) - Event time
-TOTAL_DISTANCE: 226855 km - Total Distance
-MODULE_VOLTAGE: 12.0 V - Control Module Voltage
-OUTDOOR_TEMPERATURE: 25 °C - Outside temperature
-PWR_MODE_KEY: Running - Power Mode Key State
-PWR_MODE_QF: Power Mode OK - Power Mode Quality Factor
-LOAD: 39.61 % - Calculated Load Value
-ECT: 40 °C - Engine coolant temperature
-MAP: 99.0 kPa - Manifold absolute pressure sensor
-RPM: 1063 1/min - Engine Revolutions Per Minute
-VSS: 2.0 km/h - Vehicle Speed
-IAT: 35 °C - Intake Air Temperature
-MAF: 13.64 g/s - Mass Air Flow
-TP: 93.33 % - Throttle Position
-RUNTM: 6 s - Time Since Engine Start
-FRP: 33090.0 kPa - Fuel Rail Pressure
-EGR_PCT: 38.43 % - Commanded EGR
-BARO: 99.0 kPa - Barometric pressure
-CATEMP11: 63 °C - Catalyst Temperature Bank 1, Sensor 1
-CATEMP12: 63 °C - Catalyst Temperature Bank 1, Sensor 2
-APP_D: 15.29 % - Accelerator Pedal Position D
-APP_E: 15.69 % - Accelerator Pedal Position E
-TAC_PCT: 0.00 % - Commanded Throttle Actuator Control

===END PCM===

[metalworker0]

This may be a red herring, looking at those results .. i say i something up with the throttle position ... that could be actual throttle pedal itself or the throttle body on the inlet manifold.

so looks like you are showing me two tests and Throttle position is at 93.33 % .but is that 93 percent open or 93 percent closed ?.. at such low rpm it should not be 93 percent open ... that's unless it works in a different way on a diesel .. i'm going to guess .. including me, not many people here know how this throttle body works. if its referring to that or the pedal, i don't know.

you also have to add a few more functions to the results

that is.. you've got commanded, but not actual Throttle Actuator Control, and there is no actual EGR percentage only commanded .

a guess here .. i say the pcm is calculating how much fuel pressure it needs at 93.33 % and failing to match.

others will chip in . on what tests need to be done to verify the throttle position


all the best.mark

[andz327]

Check your wiring to and from low pressure sensor especially any multi plugs ,also check wiring to and from low pressure pump including condition of any multi plugs

Sent from my SM-G990B using Tapatalk

[Pavlisk]

This may be a red herring, looking at those results .. i say i something up with the throttle position ... that could be actual throttle pedal itself or the throttle body on the inlet manifold.

so looks like you are showing me two tests and Throttle position is at 93.33 % .but is that 93 percent open or 93 percent closed ?.. at such low rpm it should not be 93 percent open ... that's unless it works in a different way on a diesel .. i'm going to guess .. including me, not many people here know how this throttle body works. if its referring to that or the pedal, i don't know.

you also have to add a few more functions to the results

that is.. you've got commanded, but not actual Throttle Actuator Control, and there is no actual EGR percentage only commanded .

a guess here .. i say the pcm is calculating how much fuel pressure it needs at 93.33 % and failing to match.

others will chip in . on what tests need to be done to verify the throttle position


all the best.mark

The results for DTC are not actually test results, it's the output from diag Forscan. It is the recorded state at the moment when the error appeared.
I haven't done any tests yet because I don't know exactly what to focus on.

Check your wiring to and from low pressure sensor especially any multi plugs ,also check wiring to and from low pressure pump including condition of any multi plugs

Sent from my SM-G990B using Tapatalk

Just to be sure. Low pressure sensor is a sensor on the fuel filter housing at the bottom of the car near the tank? I'll look into it.

Thank you very much for all your ideas.