No. 222-20-2

Service
Technical Information
222/20 ENU
2190
2
Complaint - Check Engine Error Message in Conjunction with Loss of Power or a Mooing
Noise after Switching off the Engine (222/20)
Model Line:
Boxster (982)/Boxster S (982)/Boxster GTS (982)/Boxster T (982)
Model Year:
As of 2017 up to 2021
Equipment:
4-cylinder petrol engines
Concerns:
Pressure converter for turbocharger
Information:
Customers complain about:
•
•
The Check Engine warning light coming on in conjunction with loss of power
A mooing noise after switching off the engine and when driving at low revs
One or more of the following fault memory entries are also stored in the engine electronics (DME) control
unit:
•
•
•
Date of
Introduction:
P0234 - Boost pressure control limit exceeded
P0299 - Boost pressure control deviation
P2262 - Boost pressure too low for tank ventilation
A pressure converter with an external air cleaner has been installed during production since
December 10, 2020.
Action required: Remove old pressure converter and install new pressure converter with external air cleaner.
AfterSales
Mar 9, 2021
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Service
2190
ENU
Technical Information
222/20
Installation
Position:
Installation position of pressure converter
1
– Pressure converter (old)
Required tools
Tools:
•
V.A.G 1331A - Torque wrench, 6-50 Nm/4.5-37 ftlb.
Parts required
Part Nos.:
Part No.
9A790662700
9A211008420
Mar 9, 2021
Page 2 of 6
Designation
– Location
 Pressure converter
– Turbocharger
 Air cleaner (complete)
Includes:
– Hose
– Combination holder
AfterSales
Qty.
1 ea.
1 ea.
Service
Technical Information
222/20 ENU
2190
2
Preparatory work
Work Procedure: 1
2
Remove engine compartment lid, see  Workshop Manual '557819 Removing and installing engine
compartment lid'.
To remove air filter housing, see  Workshop Manual '242519 Removing and installing air filter
housing'.
Replacing pressure converter
Work Procedure: 1
Remove old pressure converter.
1.1
Disconnect vacuum hoses  Pressure converter for turbocharger -2- and  Pressure
converter for turbocharger -3- from the pressure converter  Pressure converter for
turbocharger -1- one after the other.
1.2
Release and disconnect electric plug connection  Pressure converter for turbocharger -4on the pressure converter  Pressure converter for turbocharger -1-.
1.3
Unscrew fastening screws  Pressure converter for turbocharger -5- on the pressure
converter  Pressure converter for turbocharger -1- and remove pressure converter.
Pressure converter for turbocharger
2
Prepare new pressure converter for installing.
To do this, install air cleaner  Pressure converter (new) -2- as shown  Pressure converter (new)
on the pressure converter  Pressure converter (new) -1-.
Item
Part No.
Designation
1
9A790662700
Pressure converter
2
9A211008420
Air cleaner (complete)
Includes:
– Hose
– Combination holder
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Mar 9, 2021
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Service
2190
ENU
Technical Information
222/20
Information
Use water as a lubricant to make installing easier if necessary.
Pressure converter (new)
3
Install new pressure converter with external air cleaner.
3.1
Position new pressure converter  Pressure converter for turbocharger (new) -1- and install
and tighten fastening screws  Pressure converter for turbocharger (new) -5-.
Tightening torque 13 Nm (9.5 ftlb.)
3.2
Position and connect vacuum hoses  Pressure converter for turbocharger (new) -2- and
 Pressure converter for turbocharger (new) -3- on the pressure converter  Pressure
converter for turbocharger (new) -1- one after the other.
Information
Use water as a lubricant to make installing easier if necessary.
Mar 9, 2021
Page 4 of 6
3.3
Connect and lock electric plug connection  Pressure converter for turbocharger (new) -4-.
3.4
Clip in combination holder  Pressure converter for turbocharger (new) -6- on the vacuum
hose  Pressure converter for turbocharger (new) -2- underneath the anti-chafing tape.
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Service
Technical Information
222/20 ENU
2190
2
Pressure converter for turbocharger (new)
Information
Once installed, check the routing and position of the vacuum hoses with regard to the following points and
re-position them if necessary.
•
Sufficient distance from heat shields/fan housing/electric plug connection for high-pressure pump
•
Vacuum hoses are not strained
Concluding work
Work Procedure: 1
2
To install air filter housing, see  Workshop Manual '242519 Removing and installing air filter
housing'.
Install engine compartment lid, see  Workshop Manual '557819 Removing and installing engine
compartment lid'.
Invoicing
Invoicing:
For documentation and warranty invoicing, enter the labor operations, PQIS coding and part numbers
specified below in the warranty claim:
APOS
Labor operation
21934915
Reworking boost pressure control cycle valve
I No.
PQIS coding:
Location (FES5)
21930
Cycle valve
Damage type (SA4)
2022
whining, whistling
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Mar 9, 2021
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Parts Info:
References:
ENU
Technical Information
222/20
Part No.
Designation
Qty.
9A790662700
Pressure converter
1 ea.
9A211008420
Air cleaner (complete)
1 ea.
 Workshop Manual '242519 Removing and installing air cleaner housing'
 Workshop Manual '557819 Removing and installing engine compartment lid'
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.
Mar 9, 2021
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