A Unknown Fault code

[Rjphyton]

Hi
I hoping that someone will be able to help me with is fault code as it is coming up unknown fault in my reader the code is 0041D8 on a polo tdi 2010

Thanks

[Keithuk]

Hi
I hoping that someone will be able to help me with is fault code as it is coming up unknown fault in my reader the code is 0041D8 on a polo tdi 2010

First posts normally go in introductions else you could get a free fix and we never see you again!!!

Your car spec says 0. Is that your 2010 Polo TDI or are you trying to fix this error code for someone else?

What was that error code taken from VAG-COM\VCDS or a cheap generic scanner as it isn't listed in my new EOBD II Fault Codes Software

[Pete1]

Convert from hexadecimal to decimal and you'll probably find it. 16856 in decimal.

[Keithuk]

Convert from hexadecimal to decimal and you'll probably find it. 16856 in decimal.

You don't have to convert hexadecimal to decimal with VAG-COM\VCDS it does it for you.

VAG Error Code: 16856/001138
EOBD II Error Code: P0472

Fault Location:
Exhaust Gas Pressure Sensor 1 (G450) - Signal too Low/Short Circuit to Earth

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

Fuse(s).
Wiring/Connector(s) short to earth.
Exhaust Gas Pressure Sensor 1 (G450).
Engine Control Module (ECM).

Possible Solutions:
Check/Replace Fuse(s).
Check Coolant Fan Control Module (J293).
Read Measuring Value Blocks (MVB) (MVB) 102.3 - actual pressure..

Tech Notes:
Replacing the exhaust back pressure usually takes care of the problem.

When is the code detected?:
An Exhaust Back Pressure (EBP) signal that is detected out of range (high or low) by the Engine Control Module (ECM) will cause the engine to ignore the Exhaust Back Pressure (EBP) signal and disable exhaust back pressure operation.

Description:
The Exhaust Back Pressure (EBP) sensor is a variable capacitance sensor that, when supplied with a 5-volt reference signal from the Engine Control Module (ECM), produces a linear analogue voltage signal that indicates pressure.

The Exhaust Back Pressure (EBP) sensor's primary function is to measure exhaust back pressure so that the Engine Control Module (ECM) can control the Exhaust Back Pressure Regulator (EPR) when needed.


As taken from my new EOBD II Fault Codes Software

[Crasher]

Looks like you need a new DPF pressure sensor and possibly a forced regeneration after that

[Keithuk]

Johnny P - you can please yourself if you dislike my post, I've just stating the bleeding obvious.