NHTSA ID Number: 10249913
Manufacturer Communication Number: No. 168-18
TSB/Document Date: 2024-02-08
Summary
Technical information for a complaint - battery low and yellow warning message "battery low service necessary" in instrument cluster
Service
Technical Information
168/18 ENU
2705
2
Complaint - Battery Low and Yellow Warning Message "Battery low _ Service necessary" in
Instrument Cluster: Re-Programming Gateway Control Unit (Battery Sensor) (168/18)
Revision:
This bulletin replaces bulletin Group 2 168/18, dated February 7, 2019.
Model Year:
As of 2018 up to 2019
Model Line:
Cayenne (9YA)
Subject:
Gateway control unit (battery sensor)
Information:
Information
In the event of a customer complaint about a flat battery and if the yellow warning message
"Battery low _ Service necessary" ( Yellow warning message: Battery low _ Service necessary)
appears in the instrument cluster, the following points must be observed before doing any other work:
•
A chain of different factors can cause an increased closed-circuit current (greater than 1.0 A) after
charging.
•
A battery sensor software version lower than "1000" can bring about this symptom.
•
In the event of a customer complaint and if the battery sensor software version in the gateway
control unit is lower than "1000", re-program the gateway control unit as described in the
"Procedure" section.
Replacing components will not resolve the problem.
Yellow warning message: Battery
low _ Service necessary
Date of
Introduction:
A control unit with adapted software has been used during production since April 12, 2018 or as of
chassis number 9Y 2KD A9 5209.
Tools:
•
P90999 - PIWIS Tester 4 with software version 38.000.010 (or higher) installed
•
Battery charger with a current rating of at least 90 A.
AfterSales
Jan 26, 2024
Page 1 of 4
2
Service
Technical Information
ENU 168/18
2705
Work
Procedure:
NOTICE
Voltage drop
•
Risk of irreparable damage to control unit
•
Risk of damage to control unit
•
Fault entries in the control unit
•
Coding in the control unit is aborted
•
Malfunctions in control unit, even during programming
Before disconnecting the control unit, switch off ignition and remove ignition key.
Make sure that the power supply is not interrupted during programming.
Connect battery charger/power supply - Suitable for AGM Type batteries, recommended current
rating of 90A fixed voltage 13.5V to 14.5V.
1
Preliminary work:
1.1
Connect a battery charger with a current rating of at least 90 A.
1.2
Switch on the ignition.
NOTICE
Coding will be aborted if the WLAN connection is unstable.
•
An unstable WLAN connection can interrupt communication between PIWIS Tester 4 and the
vehicle communication module (VCI). As a result, coding/programming may be aborted.
During control unit coding/programming, always connect PIWIS Tester 4 to the vehicle
communication module (VCI) via the USB cable.
1.3
P90999 - PIWIS Tester 4 with software version 38.000.010 (or higher) installed must be
connected to the vehicle communication module (VCI) via the USB cable. Then, connect the
communication module to the vehicle and switch on the PIWIS Tester.
1.4
On the PIWIS Tester start screen, call up the 'Diagnostics' menu.
The diagnostic application is then started and the control unit selection screen is populated.
2
Jan 26, 2024
Page 2 of 4
"Gateway" control unit re-program:
AfterSales
Service
Technical Information
168/18 ENU
2705
2
Information
The procedure described here is based on the P90999 - PIWIS Tester 4 test software version
38.000.010.
The PIWIS Tester instructions take precedence and in the event of a discrepancy, these are the
instructions that must be followed.
A discrepancy may arise with later software versions for example.
Menu
•
Control
unit/Function
Instructions/information or
2.1
Control units
’Overview’
2.2
Follow instructions:
•
•
'Additional menu'
•
Campaign
number
confirm/execute
Result/consequence of action
call up
Create Vehicle Analysis Log (VAL) if necessary and
carry out any campaigns that are available for the vehicle.
2.3
2.4
Action
•F7“
•Yes“/•No“/
•F12“
‘Campaign’
select
•F12“
Value:
’L5V4A’
enter
•F12“
Read and follow the information and instructions on the PIWIS Tester during the guided
programming sequence. Then press •>>“ to continue.
During the programming sequence, the control unit is re-programmed and then re-coded automatically if necessary.
Do not interrupt programming and coding.
Once control unit programming - and coding if necessary - is complete, you will be prompted to
switch the ignition off and then back on again after a specified waiting time.
2.5
Control units
’Overview’
2.6
'Extended
identifications'
select
Battery sensor software version
programmed during this campaign
1000
Gateway
select
If programming is not completed successfully (error message “Programming unsuccessful”),
programming must be repeated.
3
Subsequent work:
3.1
Read out and erase all fault memories.
AfterSales
Jan 26, 2024
Page 3 of 4
2
Service
Technical Information
ENU 168/18
2705
Information
If there are still fault memory entries in individual control units, start the engine briefly and
then switch it off again. Wait for approx. 10 seconds before switching the ignition on again
and re-establish the connection between the PIWIS Tester and the vehicle. Then read out and
erase the fault memories of the affected control units again separately.
3.2
Switch off ignition.
3.3
Disconnect the PIWIS Tester from the vehicle.
3.4
Calibrate the battery by charging it fully.
Workshop Manual '2X00IN Trickle charging 12-volt lithium-ion battery'
3.5
Switch off and disconnect the battery charger.
End of action required.
Invoicing:
The work involved is invoiced under the labor operation:
APOS
Labor operation
90352500
Programming gateway control unit
I No.
For invoicing and documentation using PQIS, enter the following coding:
Location (FES5)
27060
Vehicle electrical system battery
Damage type (SA4)
1611
does not function
References:
Technical Information '944900 Complaint - Battery flat and specific fault code in front-end electronics
control unit: Observe specified procedure (154/18)'
Workshop Manual '2X00IN Trickle charging 12-volt lithium-ion battery'
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.
© 2024 Porsche Cars North America, Inc.
Jan 26, 2024
Page 4 of 4
AfterSales
- High density negative paste, improves performance and...
- Enhanced life alloy or Silver Calcium stamped alloy...
- Calcium lead positive grid, maximizes conductivity and...
- Robust envelope separator with puncture resistant back...
- Vent cap design that resists acid leakage
- High density negative paste, improves performance and...
- Enhanced life alloy or Silver Calcium stamped alloy...
- Calcium Lead positive grid, maximizes conductivity and...
- Robust Envelope Separator with puncture-resistant back...
- Vent cap design that resists acid leakage
Last update on 2026-06-29 / Affiliate links / Images from Amazon Product Advertising API
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: No. 168-18
Replacement Service Bulletin Number:
MFR Communication Date: 2024-01-26
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- 【OE-Level Full System Diagnostics-Lifetime F*REE Software Updates】The VDIAGTOOL D200 OBD2 Scanner for cars is a all system bidirectional scan tool that enjoy lifetime f*ree software updates, delivers complete system coverage. reading/clearing codes across engine, transmission, ABS, SAS, EPB, TPMS plus full access to body, chassis, powertrain and all control modules. This D200 Bidirectional car scanner works with most 1996+ OBD2 gasoline and hybrid
cars and light trucks. It does NOT support pure electric and heavy-duty trucks. PLEASE CHECK COMPATIBILITY BEFORE ORDERING or Contact us with VIN to confirm compatibility. - 【Supports OBD2 Full Functions-ZERO Subscription Fees】D200 Bidirectional OBD2 Scanner is a upgarde of universal car code reader. It supports OBD2 full functions to help you turn off the annoying instrument fault indicator, such as read/clear codes, O2 sensor test, I/M readiness, on-board monitor test, datastream, freeze frame, E-VAP system test, and retrieve vehicle information. This professional obd2 scanner diagnostic tool can full access to diagnostics, reset tools and maintenance features with a single payment. NOTE: The fault code can only be cleared after the vehicle's malfunction has been repaired; please ensure the vehicle issue is fixed before clearing the code.
- 【D200 Hidden 2 Advantages: 1. $169 Expandable 49+ Advanced Resets. 2. $199 Get J2534 P*a*s*s-Thru Programming】Your core car diagnostics and 26 reset remain lifetime f*ree for everyday maintenance. When you need deeper repair capability, upgrade with 3-year access for $169 in Store on VDIAGTOOL App, gaining 49+ advanced resets. D200 configured with J2534 hardware, upgrade only when you need without replacing the entire device. You also can Lifetime Unlock for $199 in Store one-time, perform module programming, software re~flashing and ECU data updates directly. Supports 17+ major brands, including for BMW, for Audi, for GM, for Ford and more. Note:D200 does‘t provide any OE software.
- 【Full Bidirectional Control / Active Tests】The D200 car scanner diagnostic tool is a true bidirectional scan tool that lets you send commands directly to the vehicle’s ECU for active tests. Quickly test fuel pumps, relays, solenoids, injectors, cooling fans, windows, sunroofs and more to verify operation instantly. Get dealership-level diagnostic control at a fraction of the cost (ofter $100-200$ per diagnostic visit), reduce guessworkand confirm repairs faster, avoid unnecessary parts replacement, towing fees and wait times.
- 【26 F*ree Essential Reset & Relearn Functions – Everyday Maintenance Made Easy】Handle common maintenance and repair jobs without visiting the shop. The D200 code readers & scan tools includes 26 f*ree high-demand reset functions, including Oil Reset, EPB Service, SAS Calibration, ABS Brake Bleeding, Throttle Relearn, Injector Coding, Headlight Adjustment, Tire Size Reset and more. Perfect for home car owners, mechanics and DIYers – just plug and diagnose anytime, anywhere! Note: Service functions vary by vehicle model—please confirm compatibility.
- 【A MUST-HAVE TOOL FOR DIYERS】 - VDIAGTOOL VD10 car code reader is an incredibly useful obd scanner for each car owner or hobbyist, even for those with little to no experience when it comes to vehicle mechanics! Similar to a fixd car diagnostic tool, using this car diagnostic scanner is extremely easy. All you have to do is attach it to your car OBDII port and you can diagnose car problems in seconds! Read Codes (DTCs); Clear Codes; Live Data; View Freeze Frame; I/M Readiness; Vehicle Information.
- 【KEEP ENGINE IN GOOD STATUS】 - VDIAGTOOL check engine code reader brings a fast access to scan, read the car fault code, show its definition on the screen instantly, troubleshooting to find the root causes of problems, erase the engine fault code and turn off the MIL (Malfunction Indicator Light). Similar to a fixd car diagnostic tool, this car code reader helps ensure your engine stays in top condition.
- 【READ/CLEAR CODES & DTC LOOKUP】- No search online & saving your time, this vehicle car code reader retrieves generic (P0, P2, P3, and U0), manufacturer specific (P1, P3, and U1) codes, pending codes and displays DTC definitions based on the built-in database(more than 3000 codes) on the TFT screen, find out the root causes and clear the codes after fixed.
- 【LIVE DATA & RETRIEVE FREEZE FRAME】 - This diagnostic scan tool for accurate diagnosis enables you to retrieve data from vehicle sensors, such as Engine RPM, Intake air temperature, Short/Long term fuel, Misfire data and etc. The freeze frame is stored in the PCM together with the diagnostic trouble code (DTC) related to the fault. Comparable to a fixd car diagnostic tool, the VD10 car code reader car scanner can be a valuable & practical diagnostic aid and also greatly help when diagnosing intermittent problems.
- 【I/M READINESS for THE S-nn-0-g CHECK】- OBDII vehicle may not pass the annual inspection unless the required monitors since reset are complete. So you should at least read the readiness monitors and make sure they are ready. This car obd2 scanner diagnostic tool is equipped with I/M readiness function to check the operations of the e-m-issi0n system on OBD2 compliant vehicles, run I/M monitor readiness test, checking if the pass vehicle s-m-0-g inspection.
- 【Professional Diagnostics】 The VD80 BT Lite bidirectional obd2 scanner is a professional OBD2 scanner diagnostic tool, delivering vehicle diagnostics right in your own garage. It supports 4,000+ active diagnostic tests, 28+ maintenance service functions, ECU coding, PMI calibration, brake service reset, and OEM-grade full-system vehicle scanning—perfect for DIYers and pros looking for powerful automotive tools. The available function tests vary by model—please to confirm compatibility.
- 【ADVANCED ECU CODE, CUSTOMIZE OE-SETTINGS】As a complete car code reader and reset tool, the VD80 BT Lite bidirectional obd2 scanner supports ECU coding for VW, for Audi, for BMW, for Benz, for Mitsubishi and more. PMI function for Ford/for Lincoln/for Mazda, supports copy data into new module. Step-by-step Guided Diagnostics makes complex jobs easier—making this one of the most reliable code readers & scan tools on the market.
- 【100000+ Vehicles Compatibility – CAN FD/DOIP】 VD80 BT Lite Auto Scanner Compatible with 100,000+ vehicles worldwide, this bidirectiona car scanner works with all OBD2-compliant vehicles manufactured after 1996, covering more than 100 brands worldwide. It also supports CAN FD, DOIP and FCA Secure Gateway protocols, boost 2X faster data transfer, covers 99% of U.S., EU and Asian cars. With 22 languages and 2 years of f*ree updates—future-proofing your car reader diagnostic for all cars.
- 【28+ Maintenance Services & Calibration Functions】VD80 BT Lite scanner for car Supports 28 maintenance services, including resetting oil and service lights after routine maintenance, registering new batteries for proper system operation, and clear clogged filters and restore performance. Additionally, it calibrates TPMS sensors after tire rotations, resets brake systems after pad replacements, relearns steering angle sensors after alignments, and more. These functions help your vehicle quickly and accurately return to peak performance—without the costly dealer visits.
- 【True Bidirectional Control – Diagnose with Confidence】Standing out with full-system coverage and extensive active test capabilities, the VD80 BT Lite bidirectional scan tool retrieves data from electronic control units and performs a wide range of active tests. You can real-time control over modules like fuel pumps, windows, A/C clutches, and relays. Perform 100+ advanced functions including throttle adaptation, injector coding, VIN write, idle relearn, and ABS bleed—helping you fix it right the first time with this all-in-one car diagnostic scanner.
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.