DME Control Unit: Fault Code P1095 (MAF Sensor) (24/10) (GROUP 2, NO. 24/10)

DME CONTROL UNIT: FAULT CODE P1095 (MAF SENSOR) (24/10)

TECHNICAL SERVICE BULLETIN

SERVICE INFORMATION

The present document was valid at the time of print. A later version may be available online

TOOLS

Designation	Type	Number	Description
PIWIS Tester	Special tool	9718

MODEL YEAR

as of 2009 up to 2010 

VEHICLE TYPE

Boxster (987) 

Cayman 

EQUIPMENT

• 2.9-liter engine
• Porsche Doppelkupplung (PDK) (I-250)

CONCERNS

• DME control unit  ,
• Hot-film mass air flow sensor  (referred to below as "MAF sensor").

INFORMATION

• Fault code P1095 in DME control unit (Check Engine warning light activated)  .
• Fault code U0401 in PDK control unit ('Gearbox emergency operation' appears in white text in the instrument cluster). 

Due to a software error in the DME control unit, a fault is detected on the MAF sensor in certain environmental and operating conditions although the MAF sensor is OK  . As a result of this software error, fault code P1095 is stored in the DME control unit or fault code U0401 is stored in the PDK transmission.

Since March 13, 2010, the software error has been corrected using a modified DME data record.

Date of Introduction: 

March 13, as of Vehicle Ident. Nos.

WP0 CA2A8 2AU 710540 USA

WP0 CA2A8 7AS 710531 USA

ACTION REQUIRED

In the event of a complaint relating to vehicles manufactured before the date of introduction  , check the data version  of the DME control unit.

Action required for vehicles manufactured after the date of introduction  : see "Procedure " section → 2. 

To determine the DME data version:

Using the PIWIS Tester 9718  , select 'DME control unit' 'Identification' to find out the part number of the DME control unit.

BOXSTER

If the part number is 987.618.623.30 or lower  , see "Procedure " section → 1  .

If the part number is 987.618.623.31 or higher  , see "Procedure " section → 2  .

CAYMAN

If the part number is 987.618.621.30 or lower  , see "Procedure " section → 1  .

If the part number is 987.618.621.31 or higher  , see "Procedure " section → 2  .

Information 

Concerns: Engine replacement.

If the engine was replaced in the vehicle, the model year of the new engine  is a decisive factor in selecting the DME data record to be programmed. If in doubt, read off the model year from the engine number. See 'Workshop Manual 1X00IN Engine numbers' and 'Driver's Manual → Vehicle Identification, Technical Data'.

WORK PROCEDURE

1. Part number is 987.618.623.30 or 987.618.621.30 or lower  :

   The data version is not up-to-date.

   Use the PIWIS Tester and test software version 27.000  (or higher) to re-program  the DME control unit.

   See → 247019 Removing and installing DME control unit - section on "Programming"  .

   Once you have worked through any fault codes that are still present, erase the fault memory  .

   End  of remedial action.

2. Part number is 987.618.623.31 or 987.618.621.31 or higher  :

   The data version is up-to-date.

   Do not  replace the MAF sensor yet.

Information 

Since the problem occurred on a vehicle after the specified date of introduction and/or after programming the DME control unit  : Correct the fault using the PIWIS Tester in accordance with "Guided Fault Finding  ".

End  of remedial action.

WORKING TIME

24702553: Programming DME control unit; Labor time 40 ZE 

References: 

→ 247019 Removing and installing DME control unit 

987110, 987111, 987310, 987311

Model year as of 2009, Model year up to 2010

C02, C36