P0C28 on Ford vehicles

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Bulletins and campaigns Ford filed with NHTSA whose summary names P0C28. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• 16-0050 Service bulletin
  2016-03-23 · Electrical System
• ENERGI - MALFUNCTION INDICATOR LAMP (MIL) WITH DIAGNOSTIC TROUBLE CODE (DTC) P0C27 AND/OR P0C28 ISSUE Some 2016 Fusion Energi and C-Max Energi vehicles may exhibit a MIL with DTC P0C27 and/or P0C28. ACTION Reprogram the powertrain control module (PCM) and the hybrid powertrain control module (SOBDMC) to the latest calibration using IDS release 99.03 or higher. Make sure you are connected
• TSB160050 Service bulletin
  2016-03-23 · Electrical System
• Energi - Malfunction Indicator lamp (MIL) with diagnostic trouble code (DTC) P0C27 AND/OR P0C28
• TSB 18-2282 Service bulletin
  2018-09-18 · Electrical System
• Some 2013-2017 Fusion Energi and C-Max Energi vehicles may exhibit an illuminated MIL with DTC P0C27 and/or P0C28. Follow the Service Procedure steps to correct the condition.
• TSB 25-2274 Service bulletin
  2025-06-25 · Electrical System
• Some of the vehicles listed in the Model statement above equipped with lithium-ion phosphate (LFP) standard range battery with minor feature code HTHAH may exhibit an illuminated powertrain malfunction indicator (wrench) lamp with the DTC P0C28 stored in the SOBDMC

A stored code names the test that failed, never the part that caused it. The record above is what Ford and its owners have filed about it; the code’s page across every make has the whole file.