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Error code help


Stuno1

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Do you mean P1025 and is it an active code ?

If so could be fuel high-pressure pump is faulty or if it's had a replacement at some point it needs adaptation with a PIWIS.

 

P1025 - Diagnostic information ­ DME (DFI) control unit Fuel high pressure adaptation

INFORMATION 1
Faults in the fuel high­-pressure injection system area are frequently caused by defects in the pre­-delivery circuit (fuel low pressure).
Therefore, the pre­-delivery circuit must be checked first in case of problems in the area of the fuel high­-pressure injection system.

Diagnostic conditions

Engine speed 450 .... 4,000 rpm
Engine temperature ­ 10 ... +100 °C (14 ... 212 °F) I Driving with different operating conditions

Possible fault causes

Pre­-delivery quantity or pressure in the fuel low­-pressure circuit too low

Fuel high­-pressure adaptation required (See Information 2)
Fuel high­-pressure pump faulty

INFORMATION 2
The old values must be deleted prior to a new adaptation of the fuel high­-pressure ranges.

The fuel high­-pressure adaptation values can be deleted using >PIWIS Tester II< as follows: >DME< A >Maintenance/repairs< A >Delete adaptation values<

Edited by iborguk
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Ta. Came up from the diagnostic when they replaced the bumper. 

Their read out states ‘no fault saved in system ecu, ecu could not detect fault’. But it shows as a fault. May just be an incorrect reading? Seems fine. 

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12 minutes ago, Stuno1 said:

Ta. Came up from the diagnostic when they replaced the bumper. 

Their read out states ‘no fault saved in system ecu, ecu could not detect fault’. But it shows as a fault. May just be an incorrect reading? Seems fine. 

Maybe it's historical then.

Any history showing the high-pressure fuel pump has been replaced ? 

I guess a read of the fuel pressure live values would rule out the pump if it was an active code.

Was this error shown on a PIWIS or some other code reader ? 

Edited by iborguk
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1 hour ago, iborguk said:

Maybe it's historical then.

Any history showing the high-pressure fuel pump has been replaced ? 

I guess a read of the fuel pressure live values would rule out the pump if it was an active code.

Was this error shown on a PIWIS or some other code reader ? 

Nothing in the documentation I have but could have been done while the car was under warranty so wouldn’t see it. 
 

He didn’t say what machine was used. I imagine it is a historical code. If I have no issues I’ll have the car checked come service time late next year. 

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