Diagnostic article Generic OBD-II
P0311: interpret cylinder 11 misfire alongside fuel and compression evidence
P0311 localizes a detected misfire to cylinder 11 but requires evidence distinguishing fuel, ignition and mechanical causes.
Read before applying this article
Documented application
Ross-Tech independent VAG diagnostic guidance; match complete fault description and controller. Vehicle-specific notes do not establish universal applicability.
The code alone does not identify a failed part or establish that a vehicle is safe to drive. Confirm the vehicle, reporting module and applicable service procedure.
P0311 means a misfire has been detected for cylinder 11. In Ross-Tech's reference, injector faults and fuel supply problems are possibilities alongside ignition trouble and inadequate compression. The code is therefore a location clue for the detected combustion problem, not a verdict on an injector or coil.
A fuel fault may have a wider origin
Ross-Tech includes fuel pressure and running out of fuel among its cause list. It also includes an EVAP purge problem. As an editorial interpretation, these alternatives make the pattern of other combustion faults useful: a record involving several cylinders can support a wider investigation even when P0311 names one cylinder. It cannot, by itself, establish which shared supply or component failed.
Avoid a numbering mistake
The source gives no engine-specific cylinder map. Confirm cylinder 11's actual location using the vehicle's repair information before inspecting or comparing components. The same number should not be assumed to occupy the same physical position across different engines.
A useful diagnostic report should state what evidence excluded or supported fuel metering, ignition and compression. A normal visual inspection alone does not resolve those branches. Ross-Tech's page is independent diagnostic guidance and does not provide a universal fuel-pressure target, compression limit or required replacement for P0311.
Article source documents
Source checks describe how the text was prepared; they do not certify a diagnosis or confirm compatibility with every vehicle using this code.
Original code reference
Dictionary definition
Cylinder 11 Misfire Detected
This definition retains its original catalog scope. The article above is limited to its explicitly documented application.
Reference scope
Generic OBD-II definition.
A manufacturer label does not establish the model, year, engine or module to which a diagnosis applies. Read the safety and diagnostic limits.
Definition source
- DTC Database: pinned community code definitions
Source checked · MIT