Hi,
My S5 displayed an orange EPC light on the dash driving home from work. I was going to look it up when home, but then the car lost power and completely stopped. After a few fruitless attempts to start, it eventually started and I continued only for the same thing to happen within another mile. After several repeat incidents, I was able to get home.
I have the Ross-Tech VCDS software so I hooked it up and these(below) were the faults listed:
Is anyone able to diagnose the issue ? More relevant is whether it's fixable at the road side or do I need to have it towed to a garage ? Do I need an Audi dealer/specialist ?
I'm not sure if the fault was triggered by the heat as it's been hot today in the UK(34C) and I could start the car after leaving it a few minutes. I don't think I should try to drive again for fear of the same fault.
Any advice appreciated!!
Thanks,
Richard
6238 - Fuel Rail/System Pressure
P0087 00 [00100000] - Too Low
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 2
Mileage: 121115 km
Date: 2025.07.01
Time: 15:35:21
Engine speed: 1269.00 /min
Normed load value: 29.8 %
Vehicle speed: 65 km/h
Coolant temperature: 96 ∞C
Intake air temperature: 44 ∞C
Ambient air pressure: 990 mbar
Voltage terminal 30: 12.796 V
Unlearning counter according OBD: 40
Engine speed: actual: 1248 /min
MAF_ENVD: 375.84705 mg/stroke
Coolant temperature (unfiltered): 94.50 ∞C
FUEL_MASS_REQ_I_CTL_ENVD: 28.265625
FUP_ENVD: 1358.5177 hPa
FUP_EFP_ENVD: 1363.83 hPa
16903 - Vapor Bubble Formation in Low-Pressure Fuel Circuit
P125B 00 [00101100] - -
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 6
Fault Frequency: 8
Mileage: 121115 km
Date: 2025.07.01
Time: 15:35:54
Engine speed: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 13 km/h
Coolant temperature: 95 ∞C
Intake air temperature: 51 ∞C
Ambient air pressure: 990 mbar
Voltage terminal 30: 12.898 V
Unlearning counter according OBD: 40
Engine speed: actual: 0 /min
MAF_ENVD: 0.00000 mg/stroke
Coolant temperature (unfiltered): 92.25 ∞C
Engine: operating status: ES
FUP_EFP_ENVD: 2045.74 hPa
Vehicle speed: actual: 8 km/h
11010 - Fuel Pump
P3043 00 [00101100] - Mechanical Malfunction
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 6
Mileage: 121092 km
Date: 2025.07.01
Time: 15:18:56
Engine speed: 2464.00 /min
Normed load value: 56.9 %
Vehicle speed: 20 km/h
Coolant temperature: 96 ∞C
Intake air temperature: 43 ∞C
Ambient air pressure: 990 mbar
Voltage terminal 30: 12.491 V
Unlearning counter according OBD: 40
Engine speed: actual: 1184 /min
MAF_ENVD: 76.25882 mg/stroke
Coolant temperature (unfiltered): 93.00 ∞C
Engine: operating status: PUC
FUP_EFP_ENVD: 5455.31 hPa
Vehicle speed: actual: 37 km/h
14812 - Fuel Pump
P308D 00 [01100101] - RPM too Low
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 6
Fault Frequency: 1
Mileage: 121117 km
Date: 2025.07.01
Time: 15:46:38
Engine speed: 1140.00 /min
Normed load value: 7.8 %
Vehicle speed: 35 km/h
Coolant temperature: 94 ∞C
Intake air temperature: 52 ∞C
Ambient air pressure: 990 mbar
Voltage terminal 30: 13.202 V
Unlearning counter according OBD: 40
Engine speed: actual: 1120 /min
MAF_ENVD: 92.60000 mg/stroke
Coolant temperature (unfiltered): 94.50 ∞C
Engine: operating status: PU
FUP_EFP_ENVD: 4773.4 hPa
Vehicle speed: actual: 35 km/h
Readiness: 0000 0000
