Please help me read the diagnosis - CRANK BUT NO START - VAG00550: Start of injection regulation

[audi0203949593]

Hi, our AUDI A6 2.5 TDI from 1998 has problems. It cranks, but it won't start anymore. After a diagnosis, these codes stood out: VAG00550: Start of injection regulation & P1857: Load signal.


Has anyone had a similar issues with these codes, please?

I will copy the entire diagnosis below:

2020-10-26 14:21
Dashboard
General information
Diagnostic session
System tests (1)
Work steps performed (37)
Test plans (1)
Error while loading the protocol details
Offboard Diagnostic Information System Service: Base 6.2.0 Main feature: 60200.103.280
Diagnostic protocol (Short)
Protocol ID:
XXXXXXXXXXXXX
Vehicle identification number (automatic):
Type:
Audi A6 1998>
Dealer/dealership number:
XXXXXXXXXX
Start of diagnosis:
2020-10-26 16:11
End of diagnosis:
2020-10-26 16:20
Time required (TU):
20
Event memory entries:
11
System test no. 1 (11)
VCI type:
System tests (1)
System test no.: 1 (9)
Address: 0001 System name: Diesel direct injection and glow plug system EDC15M Protocol variant: KWP1281/TPKLINE (Events: 1)
Identification:
Hardware part number:
------------
Part number:
4B2907401E
Hardware version number:
---
Software version number:
---
Production date:
Code:
1016
Flash capability:
unknown
System designation:
2.5l/4VTEDC G000AG D02
Subsystems:
Subbus system
Hardware part number:
------------
Part number:

Hardware version number:
---
Software version number:
---
Production date:
Code:
Flash capability:
unknown
System designation:
45440 AUZ7Z0Y1556294
Subbus system
Hardware part number:
------------
Part number:
00014059 130
Hardware version number:
---
Software version number:
---
Production date:
Code:
0
Flash capability:
unknown
System designation:
106EC150_1.R7515027608
Entry in fault memory
Number:
VAG00550: Start of injection regulation
Fault type 1:
Control difference
Fault type 2:
Intermittent
Address: 0002 System name: Automatic gearbox 01V Protocol variant: KWP1281/TPKLINE (Events: 1)
Identification:
Hardware part number:
------------
Part number:
4B0927156DN
Hardware version number:
---
Software version number:
---
Production date:
Code:
1
Flash capability:
unknown
System designation:
AG5 01V 2.5lTDI RdW 3536
Event memory entries:
Entry in fault memory
Number:
P1857: Load signal
Error Message from Engine Contr.
Fault type 1:
lost23
Fault type 2:
Intermittent
Address: 0003 System name: ABS/ESP 4WD Bosch 5.3 Protocol variant: KWP1281/TPKLINE (Events: 1)
Identification:
Hardware part number:
------------
Part number:
8D0907389E
Hardware version number:
---
Software version number:
---
Production date:
Code:
6257
Flash capability:
unknown
System designation:
ABS/ESP allrad D46
Event memory entries:
Entry in fault memory
Number:
P1857: Load signal
Error Message from Engine Contr.
Fault type 1:
lost23
Fault type 2:
Intermittent
Address: 0008 System name: Fully automatic air conditioner Protocol variant: KWP1281/TPKLINE (Events: 0)
Identification:
Hardware part number:
------------
Part number:
4B0820043J
Hardware version number:
---
Software version number:
---
Production date:
Code:
63
Flash capability:
unknown
System designation:
A6-Klimavollautomat D64
Address: 0015 System name: Front and head airbag Protocol variant: KWP1281/TPKLINE (Events: 0)
Identification:
Hardware part number:
------------
Part number:
4B0959655E
Hardware version number:
---
Software version number:
---
Production date:
Code:
1406
Flash capability:
unknown
System designation:
Airbag Front+Kopf 1001
Address: 0017 System name: Dash panel insert with driver information system WFS3 Protocol variant: KWP1281/TPKLINE (Events: 0)
Identification:
Hardware part number:
------------
Part number:
4B0920932Q
Hardware version number:
---
Software version number:
---
Production date:
Code:
160
Flash capability:
unknown
System designation:
C5-KOMBIINSTR. VDO D12
Subsystems:
Subbus system
Hardware part number:
------------
Part number:
WAUZZZ4BZ1N0
Hardware version number:
---
Software version number:
---
Production date:
Code:
Flash capability:
unknown
System designation:
45440 AUZ7Z0Y1556294
Address: 0035 System name: Central locking Protocol variant: KWP1281/TPKLINE (Events: 8)
Identification:
Hardware part number:
------------
Part number:
4B0962258E
Hardware version number:
---
Software version number:
---
Production date:
Code:
6731
Flash capability:
unknown
System designation:
Zentralverrieg.,DWA D33
Event memory entries:
Entry in fault memory
Number:
VAG01371: Alarm triggered by door contact switch on driver side
Fault type 1:
lost23
Fault type 2:
static
Entry in fault memory
Number:
VAG01572: Alarm triggered by door contact switch on frt.pass. side
Fault type 1:
lost23
Fault type 2:
static
Entry in fault memory
Number:
VAG01370: Alarm triggered by interior monitoring
Fault type 1:
lost23
Fault type 2:
static
Entry in fault memory
Number:
VAG01369: Alarm triggered by bonnet switch
Fault type 1:
lost23
Fault type 2:
static
Entry in fault memory
Number:
VAG01368: Alarm triggered by luggage compartment switch
Fault type 1:
lost23
Fault type 2:
static
Entry in fault memory
Number:
VAG00955: Key 1
Fault type 1:
Value above upper adaptation limit
Fault type 2:
Intermittent
Entry in fault memory
Number:
VAG01574: Alarm triggered by door contact switch - rear right
Fault type 1:
lost23
Fault type 2:
static
Entry in fault memory
Number:
VAG01573: Alarm triggered by door contact switch - rear left
Fault type 1:
lost23
Fault type 2:
static
Address: 0045 System name: Interior monitoring Protocol variant: KWP1281/TPKLINE (Events: 0)
Identification:
Hardware part number:
------------
Part number:
4B0951178A
Hardware version number:
---
Software version number:
---
Production date:
Code:
102
Flash capability:
unknown
System designation:
Innenraumueberw. D04
Address: 0055 System name: Automatic headlight range control Protocol variant: KWP1281/TPKLINE (Events: 0)
Identification:
Hardware part number:
------------
Part number:
4B0907357
Hardware version number:
---
Software version number:
---
Production date:
Code:
6
Flash capability:
unknown
System designation:
LEUCHTWEITEREGLER D004
Work steps performed (37)
Test plans (1)
Test plan 1
KD2034________1_0902_21_TDI_2_5_L_00021
Error list:
Control unit addressError
0001
VAG00550: Start of injection regulation
KD2329________1_0902_21_2_5_L_TDI_00021
Error list:
Control unit addressError
0001
VAG00550: Start of injection regulation
F2___4B_96______1_0298_00021
Error list:
Control unit addressError
0035
VAG01371: Alarm triggered by door contact switch on driver side
F3___4B_96______1_0298_00021
Error list:
Control unit addressError
0035
VAG01572: Alarm triggered by door contact switch on frt.pass. side
F10__4B_96______1_0298_00021
Error list:
Control unit addressError
0035
VAG01573: Alarm triggered by door contact switch - rear left
F11__4B_96______1_0298_00021
Error list:
Control unit addressError
0035
VAG01574: Alarm triggered by door contact switch - rear right
F206_4B_96______1_0198_00021
Error list:
Control unit addressError
0035
VAG01368: Alarm triggered by luggage compartment switch
KD5708_4B_57___1_0998_00021
Error list:
Control unit addressError
0035
VAG00955: Key 1
F120_4B_96______1_0198_00021
Error list:
Control unit addressError
0035
VAG01369: Alarm triggered by bonnet switch
SYS_4B_96______1_0298_00021
Error list:
Control unit addressError
0035
VAG01573: Alarm triggered by door contact switch - rear left
0035
VAG01574: Alarm triggered by door contact switch - rear right
0035
VAG01368: Alarm triggered by luggage compartment switch
0035
VAG01371: Alarm triggered by door contact switch on driver side
0035
VAG01572: Alarm triggered by door contact switch on frt.pass. side
0035
VAG01369: Alarm triggered by bonnet switch
0035
VAG01370: Alarm triggered by interior monitoring

[Hannu5]

Have a look at this thread
00550 - Start of Injection Regulation - SOLVED! DYI! | Audi-Sport.net
It's involved but directly references your fault code.

Last post has a link to pdf of the description with all photos to help if the initial photo links aren't accessible.

It's pretty involved overall, so relatively specialised depending on you skills.

[carcav]

Hi, the first part number on the list 4B0927156DN is ECU, Engine Control Unit. If that is the defect then no way the engine will start.
Good luck, hope you sort it.