No. 45-20

Service
Technical Information
45/20
ENU
WLC8
2
WLC8 - Replacing Tank Leakage Diagnosis Module (Workshop Campaign)
Model line:
911 Carrera (991)
Model Year:
As of 2012 up to 2016
Equipment:
Tank leakage diagnosis (I-no. 664)
Subject:
Tank leakage diagnosis module
Information:
Under certain regional environmental conditions, e.g. dust and humidity, there is a possibility
that particles of dirt can get into the tank leakage diagnosis module.
This can cause over-sensitive tank leakage diagnosis and the Check Engine light may be activated.
Remedial
Action:
Replace tank leakage diagnosis module and air filter for carbon canister.
Affected
Vehicles:
Only the vehicles assigned to the campaign (see also PCSS Vehicle Information). This campaign affects
26,217 vehicles in North America.
Parts required
Parts Info:
Part No.
Designation
Qty.
00004321110
 Pressure switch for tank leakage diagnosis module
1 ea.
00004321007
 Filter
1 ea.
Required tools
Tools:
•
•
Torque screwdriver, 1.5 – 3 Nm (1 – 2 ftlb.), e.g. Torque screwdriver, 1.5-3 Nm (1-2 ftlb.), VAS
6494
Torque wrench, 6 – 50 Nm (4.5 – 37 ftlb.), e.g. Torque wrench, 6-50 Nm (4.5-37 ftlb.), VAG
1331A
Replacing tank leakage diagnostic module
Work Procedure: 1
Removing carbon canister
1.1
Move cover in luggage compartment to service position  Workshop Manual '852219
Removing and installing cover'.
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1.2
Loosen battery retaining bracket and push the battery with connected lines to the right. For
instructions, see  Workshop Manual '270619 Removing and installing battery'.
1.3
Open housing cover for pre-filter and remove the pre-filter  Workshop Manual '850819
Removing and installing air intake pre-filter'.
1.4
Remove carbon canister with tank leakage diagnosis module  Workshop Manual '202519
Removing and installing carbon canister'.
Remove tank leakage diagnosis module from the carbon canister.
2.1
Loosen and unscrew fastening screws 
Loosening tank leakage diagnosis module
-2- for the tank leakage diagnosis module 
Loosening tank leakage diagnosis module
-1-.
Loosening tank leakage diagnosis module
2.2
Carefully pull tank leakage diagnosis module
 Removing tank leakage diagnosis module
-1- out of the connection on the carbon
canister  Removing tank leakage diagnosis
module -2- ( Removing tank leakage
diagnosis module -arrow-) and remove it.
Removing tank leakage diagnosis module
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Technical Information
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45/20
ENU
WLC8
2
Install new tank leakage diagnosis module
Information
The following installation sequence must always be
observed in order to prevent leaks that can cause fuel
or fuel vapors to leak out.
No lubricant (grease, etc.) must be used on the
sealing grommet in order to fit the tank leakage
diagnosis module on the carbon canister.
3.1
Check the position of the sealing sleeves
Installing tank leakage diagnosis module
 Installing tank leakage diagnosis module
-3-. If necessary, pull the sealing sleeves off the tank leakage diagnosis module you have
just removed without using tools and press them into the carbon canister  Installing tank
leakage diagnosis module -2-.
3.2
Carefully push connecting pipes for the tank leakage diagnosis module  Installing tank
leakage diagnosis module -1- through the sealing sleeves  Installing tank leakage
diagnosis module -3- as far as they will go into the connection on the carbon canister 
Installing tank leakage diagnosis module -2- ( Installing tank leakage diagnosis module
-arrow-).
3.3
Screw in and tighten fastening screws 
Securing tank leakage diagnosis module -2for the tank leakage diagnosis module 
Securing tank leakage diagnosis module -1-.
Tightening torque 1.5 Nm (1 ftlb.)
+/-0.3 Nm (+/-0.2 ftlb.)
Securing tank leakage diagnosis module
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Replace air filter on the carbon canister
4.1
Unclip cover  Replacing air filter -1- all
around the carbon canister  Replacing air
filter -2- and remove it.
4.2
Remove air cleaner  Replacing air filter -3and replace it with a new air cleaner.
4.3
Position cover  Replacing air filter -1- on
the carbon canister  Replacing air filter -2and press it in until all locking lugs engage
securely.
Installing carbon canister
5.1
Install carbon canister with tank leakage
diagnosis module  Workshop Manual
'202519 Removing and installing carbon
canister'.
5.2
Install pre-filter  Workshop Manual '850819
Removing and installing air intake pre-filter'.
5.3
Secure the battery  Workshop Manual '270619 Removing and installing battery'.
5.4
Install cover in luggage compartment  Workshop Manual '852219 Removing and installing
cover'.
Enter the campaign in the Warranty and Maintenance booklet.
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Replacing air filter
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Technical Information
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ENU
WLC8
2
Warranty processing
Scope 1:
Working time:
Labor time: 42 TU
Replacing tank leakage diagnosis module
Includes:
Removing and installing cover in luggage compartment
Loosening and securing battery
Removing and installing pre-filter
Removing and installing carbon canister with tank leakage
diagnosis unit
Parts required:
00004321110
Pressure switch for tank leakage diagnosis
module
1 ea.
00004321007
Filter
1 ea.
 Damage Code WLC8 066 000 2
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.
© 2020 Porsche Cars North America, Inc.
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