Bulletin #: 2319.1

Advanced Technical Information

Part ID: 2440

2

G2.II PHEV (V6 Variants Only) – Misfires during Engine Warm-up
Vehicles Affected
Models

Model Year

Model Type

VIN Range

Vehicle-Specific Equipment

Panamera

As of 2021

97ABX1
97ADZ1
97ANX1
97BBX1
97BDZ1
97BNX1

N/A

E-Hybrid

Revision History
Revision

Release Date

Changes

0

September 5, 2023

Original document

1

August 20, 2024

Update of rpm under Condition
Update of Technical Background
Addition of note under Service Information

Condition
The presence of DME misfire faults P030X00 occurring during catalytic warm-up (or low engine temperatures),
under low relative load for the internal combustion engine (ICE), at low ICE rpm (1400 - 3000 rpm). If there is a
customer complaint for the check engine light (CEL), then it is likely the Instrument Cluster Fault P162400 (’Engine
control indicator light switched on’) results from the misfire fault(s).
If these conditions are present, it is therefore often possible to reproduce such misfires during catalytic warming of
a cold engine as the drivetrain load supported by the electrical motor shifts to the ICE. A CEL requires two sequential
drive-cycles with entered misfire faults; nonetheless, even when the misfire fault sets for the first time, operation of
the electric motor (in E-Power or Hybrid Auto mode) suspends indefinitely for that drive cycle.

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Bulletin #: 2319.1

Advanced Technical Information

Part ID: 2440

2

Technical Background
The misfire diagnostic is sensitive, yet accurate. In some instances, the engine operating conditions during catalytic
warming may trigger misfire faults. In these instances, if the above listed conditions in the environmental fault data
for the misfires exist, then replacing the fuel injectors may serve to remedy the misfiring.
NOTE: Misfire faults can arise for numerous reasons. If the above conditions in the environmental fault data do NOT
exist, then the misfire cause requires further root cause diagnosis and remedy.

Service Information
1.
Please inquire with the customer to learn the conditions under which the CEL appeared, and compare the

environmental data with the conditions listed above.
2.
Perform a brief test drive starting with some available State of Charge in the HV-Battery to allow the ICE

to start and continue operation around 2000 rpm for approximately 90 seconds. During this drive, deter
mine if there is a definite, perceivable misfire indicated by rough running and through observation of the

misfire counter in the tester.

a.
If the fault data is consistent with the conditions above, and no rough misfires occur, then proceed
to Step 3.

b.
If a rough running ICE accompanied by significant misfire counts is observable, then proceed to
Step 4.
3.
Please replace all of the six fuel injectors.
4.
Please continue to diagnose and remedy the cause for the misfire(s), which may or may not include the
injector(s).

(Note: In some instances, rough running is also possible with the above mentioned conditions due to fueling

being disabled after reaching a misfire threshold. However, other possible causes for rough running should

be investigated first.)

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Bulletin #: 2319.1

Advanced Technical Information

Part ID: 2440

2

Warranty
As always, please document the repair completely in PCSS.
For this repair, please code the “cause” as follows:
Cause location:
2440 Injector Valve
Cause symptom:
9725 Spare part fault
Please record the customer’s statement in the PCSS job.
Use the following labor operations:
03350050
On board diagnostic.
03350053
On board diagnostic.
24402020
Injector valve remove and reinstall

Search Items
G2.II PHEV, Misfires, V6

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.

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©2024 Porsche Cars North America, Inc.

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