Service

Technical Information

23/20

ENU

WLB7

2

WLB7 - Replacing Oxygen Sensors Downstream of Catalytic Converter (Workshop
Campaign)
Vehicle type:

Panamera 4 E-Hybrid (971)
Panamera 4 E-Hybrid Executive (971)
Panamera 4 E-Hybrid Sport Turismo (971)

Model Year:

2018

Country/market:

•
•
•

Equipment:

2.9-liter V6 biturbo engine with hybrid drive

Subject:

Oxygen sensors downstream of catalytic converter

Information:

Oxygen sensors downstream of catalytic converter with a silicone protective tube are installed
on the connecting line on the affected vehicles. Gas coming from this protective tube can
contaminate the measuring electrode on the reference air side of the respective oxygen
sensor over the service life of the vehicles.

USA (C02)
Canada (C36)
Puerto Rico (C02)

As a result, it is no longer possible to correctly measure the oxygen content in the ambient air and consequently, in the exhaust gas and the Check Engine light will be activated.
Remedial
Action:

Replace oxygen sensors downstream of catalytic converter with oxygen sensors with an acrylic
protective tube.

Affected
Vehicles:

Only vehicles assigned to the campaign (see also PCSS Vehicle Information). There are 9,936 vehicles
affected by this campaign in North America.

Parts required
Part Info:

Part No.

Designation
– Use

Qty.

00004330438

 Oxygen sensor
– downstream of catalytic converter, hybrid vehicles

2 ea.

Required tools
Tools:

•
•

9900 - PIWIS Tester 3
VAS 6883 Insulated Tool Set

AfterSales

May 7, 2020
Page 1 of 5

2

Service
WLB7

ENU

•
•
•
•

Technical Information

23/20

3337 - Ring wrench set for oxygen sensor
Torque wrench, 2–10 Nm (1.5–7.5 ftlb.), e.g. VAG 1783 Torque wrench, 2-10 Nm (1.5-7.5
ftlb.) — locally available
Torque wrench, 20–100 Nm (15–74 ftlb.), e.g. VAS 5820 Torque wrench, 20-100 Nm (15-74
ftlb.) — locally available
Torque angle torque wrench, 4–400 Nm (3–296 ftlb.), e.g. VAS 6942 Digital torque wrench,
20-400 Nm (15-296 ftlb.) — locally available

Additional tools required if the high-voltage system cannot be isolated automatically using the
PIWIS Tester:
•
•

VAS 6558/9–6 High-voltage test adapter HVA 280
T40262 - Locking cap

Replacing oxygen sensors downstream of catalytic converter
Work
Procedure:

CAUTION
This procedure can only be performed under the direct supervision of a certified Porsche High
Voltage Technician (HVT).
1

Observe warning notes and information on the high-voltage system in hybrid vehicles  Workshop
Manual '2X00IN General warning notes for working on the high-voltage electrical system'.

2

Isolate the high-voltage system from the power supply using the PIWIS Tester and complete the
relevant documentation  Workshop Manual '2X00IN Isolating high-voltage system from power
supply/Starting high-voltage system'.

3

Remove strut (dome strut)  Workshop Manual '408619 Removing and installing strut (dome strut)'.

4

Remove engine cover (design cover)  Workshop Manual '108319 Removing and installing engine
cover (design cover) (V6 Turbo)'.

CAUTION
Hot components
•

Risk of burns



Let hot components cool down.



Wear personal protective gear.

May 7, 2020
Page 2 of 5

AfterSales

Service

Technical Information
5

6

23/20

ENU

WLB7

2

Remove heat shield  Removing heat shield for
turbocharger -1- for turbocharger.
5.1

Loosen and unscrew fastening screws 
Removing heat shield for turbocharger -2- for
the heat shield.

5.2

Loosen and unscrew rear fastening pins for
the engine cover (ball pins)  Removing heat
shield for turbocharger -3-.

5.3

Guide out and remove heat shield 
Removing heat shield for turbocharger -1-.

Removing heat shield for turbocharger
Remove electric passenger compartment heater and
set it aside.
To do this, loosen and unscrew the heater fastening screws. Do not disconnect high-voltage
plug connections and coolant hoses.
For instructions, see  Workshop Manual '828019 Removing and installing electric passenger
compartment heater.'

CAUTION
Risk of damage to sensor if handled incorrectly!


Do not remove the plastic cap on the thread until just prior to installing the sensor. The grease used on
the thread must never get into the connector.



Protect sensors – before and after installing – against mechanical shocks.



Sensors that were dropped on the floor must not be used owing to the risk of a broken ceramic
insulator.



The cables must not be twisted or kinked when the sensors are screwed in. Avoid pulling on the cable
and connector.



Cleanliness in the housing of the plug connections is of utmost importance for the oxygen sensor
to function properly. Particles of dirt can impair the function of the sensor. The connector must
therefore be protected against any and all types of soiling.



Sensors with a soiled or damaged connector must no longer be used.



Protect the cables and connectors when carrying or moving the exhaust system with the sensors
already installed.



High-pressure cleaning equipment must not be used in the area of the sensors and plug connections.



Contact and corrosion agents, e.g. Stabilant, must not be applied to the plug contacts of the oxygen
sensors.

AfterSales

May 7, 2020
Page 3 of 5

2

Service
WLB7

ENU

7

Technical Information

23/20

Remove oxygen sensor downstream of catalytic converter for cylinder bank 1 and cylinder bank
2 and install a new oxygen sensor  Workshop Manual '247319 Removing and installing oxygen
sensor downstream of catalytic converter (V6 biturbo)'.
Part No.

Designation

Qty.

00004330438

Oxygen sensor

2 ea.

8

Move electric passenger compartment heater into installation position and fasten it.
For instructions, see  Workshop Manual '828019 Removing and installing electric passenger
compartment heater.'

9

Install heat shield  Installing heat shield for
turbocharger -1- for turbocharger.
9.1

Guide in and position heat shield  Installing
heat shield for turbocharger -1-.

9.2

Screw in and tighten fastening screws 
Installing heat shield for turbocharger -2- for
the heat shield.
Tightening torque 9 Nm (6.5 ftlb.)

9.3

Screw in and tighten rear fastening pins for
engine cover (ball pins)  Installing heat
shield for turbocharger -3-.
Tightening torque 4.8 Nm (3.4 ftlb.)

Installing heat shield for turbocharger

10 Install engine cover (design cover)  Workshop Manual '108319 Removing and installing engine
cover (design cover) (V6 Turbo)'.
11 Install strut (dome strut)  Workshop Manual '408619 Removing and installing strut (dome strut)'.
12 Start the high-voltage system and complete the relevant start-up documentation.  Workshop
Manual '2X00IN Isolating high-voltage system from power supply/Starting high-voltage system'.
13 Enter the campaign in the Warranty and Maintenance booklet.

May 7, 2020
Page 4 of 5

AfterSales

Service

Technical Information

23/20

ENU

WLB7

2

Warranty processing
Information
The specified working time was determined specifically for carrying out this campaign and may differ
from the working times published in the Labor Operation List in the PCSS.
Scope 1:

Not relevant for this vehicle type.

Scope 2:

Replacing oxygen sensors downstream of catalytic converter
•

Vehicles with hybrid drive
Working time:
Labor time: 129 TU

Replacing oxygen sensors downstream of catalytic converter
Includes:
Isolating high-voltage system from power supply and
starting high-voltage system
Removing and installing electric passenger compartment
heater
Removing and installing strut (dome strut)
Removing and installing engine cover (design cover)
Removing and installing heat shield for turbocharger
Parts required:
00004330438

Oxygen sensor

2 ea.

 Damage Code WLB7 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.

AfterSales

May 7, 2020
Page 5 of 5