Porsche bulletin No. 2311.1
What it saysInstructions on advanced technical information for DME fault P310B00 - fuel low pressure NHTSA’s full summary ↓
Porsche filed this with NHTSA as a service bulletin dated Dec 14, 2023, received Jan 3, 2024, about the fuel/propulsion system. It names 3 model years (2021–2023). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationInstructions on advanced technical information for DME fault P310B00 - fuel low pressure
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| No. 2311.1 | Service bulletin | Dec 14, 2023 | 10248184 | not found |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 3 model years this bulletin names have filed 20 complaints with NHTSA since 2015. 11 of them name Fuel/Propulsion System — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
Two separate instances of fuel line failure and fuel leak in the engine compartment. The first in March 2024 and the second in September 2025. The situations both resulted in fuel leaking on top of the hot engine components. Repair requires removal of the engine and transmission. In 2024 repair time was 9 weeks, in 2025 - 3 weeks.
2021 Porsche 911 · Fuel/Propulsion System · filed with NHTSA Oct 15, 2025 · ODI 11693498
Strong fuel smell in rear of vehicle, Upon further inspection, it was discovered that a hard fuel line connection was leaking from a fitting on top of a very hot engine and very close to a very hot manifold. Leak was very pronounced and there was strong evidence that this leak and been dropping for some time.
2022 Porsche 911 · Fuel/Propulsion System · filed with NHTSA Jul 13, 2026 · ODI 11750011
The most universal symptom is a sudden, overpowering raw gasoline odor emanating from the rear of the car after parking. This smell will quickly fill a closed garage and can often permeate into the cabin through the HVAC system while driving.
2022 Porsche 911 · Fuel/Propulsion System · filed with NHTSA Nov 1, 2026 · ODI 11774956
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the fuel/propulsion system
Source: same model, same component group15 other manufacturer communications filed against the Porsche 911 under the same component group (fuel/propulsion system), newest first. The eight newest are listed; the rest are on the Porsche list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| WNM9 | Service campaign | Jul 9, 2026 | Re-Programming DME Control Unit (Workshop Campaign) |
| WTB0 | Service campaign | Jul 6, 2026 | Reprogramming the engine ECU to resolve fan blockage fault codes |
| nO. d766 | Service bulletin | Feb 23, 2026 | Parts information for parts withdrawal involving the fuel filler flap and the charge cable for mains socket. Part numbers 976809857E and 7PP… |
| No. D764 | Service bulletin | Feb 13, 2026 | Parts information for parts withdrawal involving the multi-purpose additive for gasoline. Part number is 00004320902. The vehicles affected… |
| No. D756 | Service bulletin | Jan 30, 2026 | Parts information for parts withdrawal involving the - Diagnosis Pump for Fuel System 958906243B and 958906243A. Vehicles affected are ones… |
| No. 52-25 | Service bulletin | Jan 5, 2026 | Technical information on a Warning Messages / Information Messages for Gasoline Particle Filter (OPF): Provision of Supporting Diagnostic In… |
| No. 02-25 | Service bulletin | Jan 5, 2026 | Technical information for Need For Replacement of High-Voltage Battery On Vehicles Up to Model Year 2024: Observe Specified Procedure… |
| No. 2501 | Service bulletin | Apr 17, 2025 | Advanced Technical Information - E3. II Cayenne PHEV: DME P242100 - Fuel Tank Isolation Valve for Tank Ventilation System - Stuck Open |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Porsche, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Porsche No. 2311.1 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the No. 2311.1 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way. Every Porsche warranty extension on file lists the ones Porsche has filed.
Which vehicles does No. 2311.1 cover?
The manufacturer filed it against 3 model years: 2023 Porsche 911, 2022 Porsche 911, 2021 Porsche 911. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.