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D3 a8 EPS EPC Rough Idle - Codes - Wiring?

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Old 07-21-2021, 08:50 AM
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Default D3 a8 EPS EPC Rough Idle - Codes - Wiring?

The car started running rough, barely idling. It has basically been sitting for a year while I procrastinated fixing things. I am getting the following codes, looks to me like it is a wiring issue somewhere, can anyone point me in the right direction?

Address 01: Engine Labels:. 079-907-560-BVJ.clb
Part No SW: 4E1 910 560 A HW: 4E1 907 560
Component: 4.2l V8/4V 0040
Revision: --H16--- Serial number: AUX3Z0F4793999
Coding: 01060009190F0120
Shop #: WSC 01013 444 54617
VCID: 20191C1BB6C5EBCBAF3-8074

15 Faults Found:
001112 - Evap System Purge Control Valve (N80)
P0458 - 002 - Short to Ground - MIL ON
Freeze Frame:
Fault Status: 11100010
Fault Priority: 0
Fault Frequency: 3
Reset counter: 255
Mileage: 283847 km
Time Indication: 0
Date: 2021.07.19
Time: 09:46:44

Freeze Frame:
RPM: 531 /min
Load: 63.1 %
Speed: 0.0 km/h
Temperature: 93.0°C
Temperature: 51.0°C
Absolute Pres.: 980.0 mbar
Voltage: 11.557 V

005224 - EVAP Canister Solenoid Valve 2 (N115)
P1468 - 002 - Short to Ground - MIL ON
Freeze Frame:
Fault Status: 11100010
Fault Priority: 0
Fault Frequency: 3
Reset counter: 255
Mileage: 283847 km
Time Indication: 0
Date: 2021.07.19
Time: 09:46:44

Freeze Frame:
RPM: 531 /min
Load: 63.1 %
Speed: 0.0 km/h
Temperature: 93.0°C
Temperature: 51.0°C
Absolute Pres.: 980.0 mbar
Voltage: 11.684 V

004199 - Intake Air Switch-Over Valve (N335)
P1067 - 002 - Short to Ground
Freeze Frame:
Fault Status: 01100010
Fault Priority: 0
Fault Frequency: 3
Reset counter: 255
Mileage: 283847 km
Time Indication: 0
Date: 2021.07.19
Time: 09:46:44

Freeze Frame:
RPM: 531 /min
Load: 63.1 %
Speed: 0.0 km/h
Temperature: 93.0°C
Temperature: 51.0°C
Absolute Pres.: 980.0 mbar
Voltage: 11.684 V

005173 - Secondary Air Pump Relay (J299)
P1435 - 002 - Short to Ground - MIL ON
Freeze Frame:
Fault Status: 11100010
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 283847 km
Time Indication: 0
Date: 2021.07.19
Time: 09:46:44

Freeze Frame:
RPM: 531 /min
Load: 63.1 %
Speed: 0.0 km/h
Temperature: 93.0°C
Temperature: 51.0°C
Absolute Pres.: 980.0 mbar
Voltage: 11.684 V

005494 - Right Engine Mount Solenoid Valve (N145)
P1576 - 002 - Short to Ground
Freeze Frame:
Fault Status: 01100010
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 283847 km
Time Indication: 0
Date: 2021.07.19
Time: 09:46:44

Freeze Frame:
RPM: 531 /min
Load: 63.1 %
Speed: 0.0 km/h
Temperature: 93.0°C
Temperature: 51.0°C
Absolute Pres.: 980.0 mbar
Voltage: 11.684 V

005491 - Left Engine Mount Solenoid Valve (N144)
P1573 - 004 - Open Circuit
Freeze Frame:
Fault Status: 01100100
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 283847 km
Time Indication: 0
Date: 2021.07.19
Time: 09:46:44

Freeze Frame:
RPM: 531 /min
Load: 63.1 %
Speed: 0.0 km/h
Temperature: 93.0°C
Temperature: 51.0°C
Absolute Pres.: 980.0 mbar
Voltage: 11.684 V

005715 - Please check DTC Memory of ABS Controller
P1653 - 008 -
Freeze Frame:
Fault Status: 01101000
Fault Priority: 0
Fault Frequency: 14
Reset counter: 255
Mileage: 283847 km
Time Indication: 0
Date: 2021.07.19
Time: 09:46:44

Freeze Frame:
RPM: 473 /min
Load: 66.6 %
Speed: 0.0 km/h
Temperature: 94.0°C
Temperature: 51.0°C
Absolute Pres.: 980.0 mbar
Voltage: 11.684 V

004763 - Fuel Pressure Regulator Valve; Bank 2 (N276)
P129B - 004 - Open Circuit - MIL ON
Freeze Frame:
Fault Status: 11100100
Fault Priority: 0
Fault Frequency: 8
Reset counter: 255
Mileage: 283847 km
Time Indication: 0
Date: 2021.07.19
Time: 09:46:44

Freeze Frame:
RPM: 473 /min
Load: 66.6 %
Speed: 0.0 km/h
Temperature: 94.0°C
Temperature: 51.0°C
Absolute Pres.: 980.0 mbar
Voltage: 12.573 V

000258 - Mass Air Flow Sensor (G70)
P0102 - 002 - Signal too Low - MIL ON
Freeze Frame:
Fault Status: 11100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 283847 km
Time Indication: 0
Date: 2021.07.19
Time: 09:46:45

Freeze Frame:
RPM: 543 /min
Load: 58.4 %
Speed: 0.0 km/h
Temperature: 93.0°C
Temperature: 51.0°C
Absolute Pres.: 980.0 mbar
Voltage: 12.446 V

000049 - Oxygen (Lambda) Sensor B1 S1: Heating Circuit
P0031 - 002 - Short to Ground - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 283847 km
Time Indication: 0
Date: 2021.07.19
Time: 09:46:49

Freeze Frame:
RPM: 488 /min
Load: 61.2 %
Speed: 0.0 km/h
Temperature: 93.0°C
Temperature: 51.0°C
Absolute Pres.: 980.0 mbar
Voltage: 12.573 V

000081 - Oxygen (Lambda) Sensor B2 S1: Heating Circuit
P0051 - 002 - Short to Ground - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 283847 km
Time Indication: 0
Date: 2021.07.19
Time: 09:46:49

Freeze Frame:
RPM: 488 /min
Load: 61.2 %
Speed: 0.0 km/h
Temperature: 93.0°C
Temperature: 51.0°C
Absolute Pres.: 980.0 mbar
Voltage: 12.573 V

009217 - EVAP Leak Detection Pump Control Circuit
P2401 - 002 - Short to GND - MIL ON
Freeze Frame:
Fault Status: 11100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 283847 km
Time Indication: 0
Date: 2021.07.19
Time: 09:46:54

Freeze Frame:
RPM: 549 /min
Load: 60.8 %
Speed: 0.0 km/h
Temperature: 93.0°C
Temperature: 51.0°C
Absolute Pres.: 980.0 mbar
Voltage: 12.700 V

000087 - Oxygen (Lambda) Sensor B2 S2: Heating Circuit
P0057 - 002 - Short to Ground - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 283847 km
Time Indication: 0
Date: 2021.07.19
Time: 09:46:54

Freeze Frame:
RPM: 549 /min
Load: 59.6 %
Speed: 0.0 km/h
Temperature: 93.0°C
Temperature: 51.0°C
Absolute Pres.: 980.0 mbar
Voltage: 11.430 V

000054 - Oxygen (Lambda) Sensor B1 S2: Heating Circuit
P0036 - 004 - Malfunction / Open Circuit - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 283847 km
Time Indication: 0
Date: 2021.07.19
Time: 09:47:05

Freeze Frame:
RPM: 560 /min
Load: 62.7 %
Speed: 0.0 km/h
Temperature: 93.0°C
Temperature: 51.0°C
Absolute Pres.: 980.0 mbar
Voltage: 13.716 V

008852 - Fuel Pressure Regulator Valve (N276)
P2294 - 004 - Open Circuit - MIL ON
Freeze Frame:
Fault Status: 11100100
Fault Priority: 0
Fault Frequency: 6
Reset counter: 255
Mileage: 283854 km
Time Indication: 0
Date: 2021.07.20
Time: 02:38:15

Freeze Frame:
RPM: 491 /min
Load: 87.8 %
Speed: 0.0 km/h
Temperature: 39.0°C
Temperature: 36.0°C
Absolute Pres.: 980.0 mbar
Voltage: 11.557 V

Readiness: 0110 1101
Old 07-21-2021, 08:54 AM
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Eeek! How's your battery? First though (hopeful thought) is the low battery always sets codes in these cars...
Old 07-21-2021, 09:51 AM
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I don't think so. Battery is 1 to 2 years old. Charged recently while doing ebrake stuff too.
Old 07-21-2021, 10:04 AM
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OK, fuse 5 (engine management) was blown. I replaced it while the car was running and it smoothed right out. I then cleared the codes and I am still left with the following. It also blew the fuse again after I shut it down and restarted.

Wednesday,21,July,2021,14:01:11:24716
VCDS Version: Release 21.3.0 (x64) Running on Windows 10 x64
www.Ross-Tech.com

Address 01: Engine Labels: 079-907-560-BVJ.CLB
Control Module Part Number: 4E1 910 560 A HW: 4E1 907 560
Component and/or Version: 4.2l V8/4V 0040
Software Coding: 01060009190F0120
Work Shop Code: WSC 01013 444 54617
VCID: 20191C1BB6C5EBCBAF3-8074
Fault Codes have been Erased

3 Faults Found:
008852 - Fuel Pressure Regulator Valve (N276)
P2294 - 004 - Open Circuit
Freeze Frame:
Fault Status: 01100100
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 283854 km
Time Indication: 0
Date: 2021.07.21
Time: 02:01:35

Freeze Frame:
RPM: 672 /min
Load: 25.1 %
Speed: 0.0 km/h
Temperature: 96.0°C
Temperature: 45.0°C
Absolute Pres.: 980.0 mbar
Voltage: 13.970 V

004763 - Fuel Pressure Regulator Valve; Bank 2 (N276)
P129B - 004 - Open Circuit
Freeze Frame:
Fault Status: 01100100
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 283854 km
Time Indication: 0
Date: 2021.07.21
Time: 02:01:35

Freeze Frame:
RPM: 672 /min
Load: 25.1 %
Speed: 0.0 km/h
Temperature: 96.0°C
Temperature: 45.0°C
Absolute Pres.: 980.0 mbar
Voltage: 13.970 V

005491 - Left Engine Mount Solenoid Valve (N144)
P1573 - 004 - Open Circuit
Freeze Frame:
Fault Status: 01100100
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 283854 km
Time Indication: 0
Date: 2021.07.21
Time: 02:01:35

Freeze Frame:
RPM: 475 /min
Load: 39.2 %
Speed: 0.0 km/h
Temperature: 96.0°C
Temperature: 45.0°C
Absolute Pres.: 980.0 mbar
Voltage: 12.065 V


Readiness: 0110 1101
Old 07-21-2021, 10:25 AM
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Old 07-21-2021, 01:02 PM
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Is the pressure regulator valve the same as high pressure fuel pumps? Would both go at once or should I be looking for a short/frayed wire? Would the failure of the pumps cause the fuse to blow?

This is what RossTech says 18726/P2294/008852 - Ross-Tech Wiki

18726/P2294/008852 - Fuel Pressure Regulator Valve (N276): Open Circuit

Possible Symptoms

  • Malfunction Indicator Light (MIL) ON

Possible Causes

  • Wiring and/or connections faulty
  • Fuel Pressure Regulator Valve (N276) defective

Possible Solutions

  • Check wiring and connections
  • Check / Replace N276

Special Notes

  • On some engines, the N276 may be refered to as the N290 in the factory wiring diagram.
Old 07-22-2021, 01:34 PM
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Does anyone know how to test the High Pressure Fuel Pumps to confirm they are bad?
Old 07-25-2021, 12:17 PM
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It seems like the bank 1 pump is blowing the fuse.
Old 07-27-2021, 02:43 PM
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Not really got any advice. You’ve got a boatload of errors, so don’t really know where to start from an armchair diagnostics perspective. It needs hands, eyes, and ears on it at this stage. Just keep plugging away and when you’re down to some more specific errors and symptoms, that’s where we’ll be able to help more.
Old 07-29-2021, 10:02 AM
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Well, in case anyone runs into this problem it was the Bank 1 - passengers side USA HPFP high pressure fuel pump. Cam follower was in good shape. Rock Auto was the cheapest
The following 2 users liked this post by pelletman:
aTOMic (07-30-2021), Chimney (07-29-2021)
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