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Complaint – Warning Message "Lift System Fault – Service Necessary" Appears in
Instrument Cluster: Observe Specified Procedure (40/21)
Model Line:

911 Carrera (992)

Model Year:

As of 2020

Equipment:

Front-axle lift function (M-no. 2UH)

Concerns:

Front-axle lift function

Information:

The white warning message 'Lift system fault – Service necessary' appears in the instrument cluster and
the entry '000302 – Measuring vehicle height fault' can be stored in the fault memory of the front-axle lift
system control unit. This fault type can occur if the vehicle was parked with the body front section raised.
Information
Always park the vehicle at the lowered position, as the upper holding position cannot be guaranteed
over a long period of time with the engine stopped depending on the system. Further information on the
front-axle lift system can be found in the relevant section of the Owner's Manual.

Action required: If both error messages are displayed, perform ride height measurement and check.

Required tools
Tools:

•

Battery charger with a current rating of at least 90 A and, if required, also with a current and
voltage-controlled charge map for lithium starter batteries, e.g. VAS 5908 battery charger,
90A

Information
The 911 (992) may be equipped with a lithium-ion 12V battery (I-no. J2A).
Lithium starter batteries must only be charged using a suitable battery charger that has a current
and voltage-controlled charge map.
For further information about the battery chargers to be used, see  Workshop Manual '270689
Charging battery/vehicle electrical system'.

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Ride height measurement and check
Work Procedure: 1

Perform ride height measurement.
1.1

Raise the body front section.
1.1.1

Start the engine.

1.1.2

Press the button for the lift system in the center console.

1.1.3

Wait until the indicator light on the button lights up continuously red.
A message briefly appears in the instrument cluster indicating that the body front
section is raised.

1.1.4

Stop the engine.

Information
The measurement is described and shown for one side as an example. The measurement on
the other side is almost identical.
1.2

Determine the ride height at the front left  Ride height measurement, front left -Z-.
1.2.1

Apply adhesive strips (e.g. adhesive tape)  Ride height measurement, front left
-1- to the wing.

1.2.2

Align the measurement tool  Ride height measurement, front left -2- vertically
and mark the measuring point  Ride height measurement, front left -3-.

1.2.3

Carefully measure the ride height and write it down.

1.2.4

Repeat the procedure for the right side.

1.3

Observe an idle period of three hours.

1.4

Repeat the measurements, write them down and compare values:
Assessment

( )

(✗)

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The ride height at the left or
right has dropped by less than
10 mm (0.4 inch).

The ride height at the left or
right has dropped by more than
10 mm (0.4 inch).

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Action required
Please inform the customer that the vehicle
must only be parked with the front body section
lowered. Further information can be found
in the 'Front-axle lift system' section of the
Owner's Manual.
There is not necessarily a technical fault if the
fault type occurs again. The error message
can be corrected by repeated raising and
lowering of the lift system.
Replace compressor for front-axle lift system,
see  Workshop Manual '431519 Removing
and installing compressor (front-axle lift
system)'.

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Ride height measurement, front left

Required parts and materials as required
Parts Info:

Part No.
9P1412257G

WHT008676

Designation
Qty.
– Use
 Pump unit including pressure 1 ea.
line
– Front-axle lift system
 Hexagon-head bolt,
2 ea.
M12 x 1.5 x 45
– Right diagonal brace

Additional parts required (M-no. 1X1):
Part No.
PAF107190

PAF008660

Designation
– Use
 Collared cheese head bolt
with hexagon socket head
– Front drive shaft
 Hexagon nut, M10
– Front transmission support

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Qty.
12 ea.

2 ea.

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N 10629602

992521225
PAF909910

PAF909910

Materials:

 Hexagon flange bolt,
M10 x 35
– Rear final drive bracket
 Boot
– Cardan shaft
 Cheese head bolt with
multiple-tooth head, M10 x 23
(M-no. G1L)
– Cardan shaft
or

4 ea.

 Cheese head bolt with
multiple-tooth head, M8 x 16
(M-no. G1G)
– Cardan shaft

4 ea.

1 ea.
3 ea.

Required materials (usually already available at the Porsche dealer):
Part No.

Designation
– Use
 Lubricating grease
– Front cardan shaft

PAF052735

1) approx.

Qty.
20-gram tube 1)

2 grams required per vehicle

Invoicing
Invoicing:

For documentation and warranty invoicing, enter the labor operations, PQIS coding and, if required,
relevant part numbers specified below in the warranty claim:

APOS

Labor operation

43010149

Checking levelling system

43151950

Removing and installing compressor for levelling
system

I No.

PQIS coding:
Location (FES5)

43810

Air-lift pump control unit

Damage type (SA4)

9833

Cannot establish cause, re-coded

References:

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 Workshop Manual '431519 Removing and installing compressor (front-axle lift system)'

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Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training
courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special
tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the
safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and
safely. Part numbers listed in these bulletins are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a
discrepancy, the work procedures in the PIWIS Tester are the ones that must be followed.

© 2021 Porsche Cars North America, Inc.

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