A BMW 328i drove normally with fuel in the tank, but surged and stalled as the level fell. Refueling restored normal behavior. P0171 and P0174 appeared together, along with catalyst-efficiency codes.
What the report actually shows
The strong relationship with fuel level is the distinguishing observation. The thread discussed fuel pickup and in-tank supply possibilities, but did not document a measured pressure test or completed repair.
Reported outcome
A final component-level cause was not reported.
What to take from this case
Test fuel supply under the same low-level condition before assuming the oxygen sensors or catalysts are the root fault. Treat the catalyst codes as additional evidence to interpret after the running issue.
This is a reported experience and an educational reading of its evidence, not a diagnosis for another vehicle. The original discussion is linked below; AI4Car has not independently inspected the vehicle.
Sources and further reading
Community discussion · outcome not verified
For information, not a diagnosis or repair instruction. A reported result may not apply to your car. Consult the manufacturer's guidance and a qualified technician.
How to use this information
This is an editorial interpretation of a public discussion. Replies, votes and an accepted answer do not prove a diagnosis. An author-reported finding or repair has not been independently verified by AI4Car. Illustrations are conceptual. Read the content limitations.
Content and reuse
An AI-assisted educational explanation prepared for AI4Car. References provide factual context; linking to a publication does not grant a license to its text or images or imply its author’s endorsement. No Creative Commons license is asserted for those third-party materials.
Illustration: AI-generated for AI4Car; a generic conceptual view, not a photograph of the reported vehicle or a manufacturer’s diagram. Content and licensing policy.
Was this useful?
Discussion
Share what you checked, what changed, and which vehicle you drive. Up to 10 comments and replies per account in 24 hours.
Loading discussion…