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I want to talk about something that came to me a few days ago with my Passat 2001 TDI PD. Underrun disappeared most of the engine power, the glow light began to flash. I drove home, then diagnosed it. Then generated 6 error codes:
P305
P1672
P3007
P1441
P0571
01336, Comfort System Databus
J445 (relay failure)

As you can see, this is a long list that came into being.

Yes, I could still start the car, but not "normal-easy".


First I changed (according to tips from internet) brake light switch (P0571). Still the same error codes, the glow light continued to flash.

I then check all the fuses (and relays), again (on the side panel), but now also under the dashboard, also check in the ECU plastic box. Also checks relay 219 which looked nice but found that the fuse next to it (fuse 15A) was broken. This fuse was replaced and ....... all codes disappeared ....

Hope this will help others ... First check all fuses, contacts, relays before replacing spare parts. Now I have to say that I think it is a slightly stupid position of such critical fuse as discussed here. This box containing these relays and fuses is not readily available.
Why was this fuse destroyed? Well, I found a wire that went to the N18 where the insulation was partially gone. May her this shorted to ground. This was then fixed.

I quite like this one of my cars, but I think it has a lot of electrical, unnecessary errors and that you have to have a little too good insight into the car that I would recommend VW as the first choice to anyone.

Hope this can help someone else....

Regards from Norway
 

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P305 a number missing

P1672
P3007
P1441
P0571
01336, Comfort System

VAG Error Code: 18080/005746

EOBD II Error Code: P1672

Fault Location:
Coolant Fan Control 1 - Open Circuit/Short Circuit to Earth

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.

Fuse(s).
Wiring/Connector(s) open circuit/short to earth.

Possible Solutions:
Check/Replace Fuse(s).
Check/Replace all faulty Wiring/Connector(s).
Read Measuring Value Blocks (MVB).

VAG Error Code: 19463/012295

EOBD II Error Code: P3007

Fault Location:
Camshaft Position (Hall) Sensor (G40) - No Signal

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.

Fuse(s).
Wiring/Connector(s).
Camshaft Position (Hall) Sensor (G40) faulty.

Possible Solutions:
Check/Replace Fuse(s).
Check/Replace all faulty Wiring/Connector(s).
Read Measuring Value Blocks (MVB).
Check/Replace Camshaft Position (Hall) Sensor (G40).

VAG Error Code: 17849

EOBD II Error Code: P1441

Fault Location:
Exhaust Gas Recirculation (EGR) Valve/Solenoid, Bank 1 - Open Circuit/Short Circuit to Earth

Possible Cause:
Fuse(s).
Wiring/Connector(s) open circuit/short to earth.
Exhaust Gas Recirculation (EGR) Valve/Solenoid.

Possible Solutions:
Check/Replace Fuse(s).
Check/Replace all faulty Wiring/Connector(s).
Read Measuring Value Blocks (MVB).

VAG Error Code: 16955/2644/001393/0004/0003

EOBD II Error Code: P0571

Fault Location:
Brake Light Switch (F) - Circuit Malfunction/Implausible Signal

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Glow Plug Indicator Light (K29) active.
Brake Light(s) not working.

Fuse(s).
Wiring/Connector(s).
Wrong Brake Light Bulb installed (21W instead of 5/21W).
Brake Light Bulb(s) faulty.
Brake Light Switch (F) faulty.
Misadjusted brake switch.

Possible Solutions:
Check/Replace Fuse(s).
Check/Replace all faulty Wiring/Connector(s).
Check/Replace Brake Light Bulb(s).
Check/Replace Brake Light Switch (F).

Special Notes:
Brake Light Switches (F) have the reputation of breaking quite often.

When is the code detected?:
The P0571 codes is set when the brake light switch does not turn off even once the vehicle is driven.

Description:
When the brake pedal is depressed, the brake light switch sends a signal to the Engine Control Module (ECM). When the Engine Control Module (ECM) receives this signal, it cancels the cruise control.

VAG Error Code: 01336

Fault Location:
Data Bus for Comfort System (Company Data Bus for Comfort System) - Single-Wire Operation

Possible Cause:
Data Bus Comfort working in Single-Wire Mode.

Wiring/Connector(s) from/to Control Modules.
Control Module in CAN Data Bus Comfort faulty.

Possible Solutions:
Check/Replace Wiring/Connector(s) from/to Control Modules.
Check CAN Gateway Coding.
Read Measuring Value Blocks (MVB).

Special Notes:
When found in VW Passat (3B): Comfort System, check Comfort Control Module and Door Control Modules.
Wiring/Connector(s) from/to Door Control Modules faulty.
Door Control Modules faulty.
Comfort Control Modules flooded/faulty.

As taken from my new Free EOBD II Error Codes software
 
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