Powertrain, generic

P0E96 DC/DC Converter Voltage Sensor C Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P0E96 opens the series for a third voltage measurement in a DC/DC converter, sensor C. It is the general circuit code, meant for a missing or electrically invalid signal; range, low, high and erratic faults of the same sensor follow from P0E97 to P0E9A. Where a converter has more than two voltage channels, for example input and output plus a redundant reading, C names the third. No manufacturer documents P0E96 or any sensor C code in public sources. For orientation, GM's 2025 engine tables (25OBDG03A) cover sensors A and B of a 12 V converter that supports engine auto-starts, with valid readings between 1 V and 28 V and Type B confirmation; FCA calls the first two channels voltage sensor 1 and 2. CARB asks for circuit faults of such inputs to be detected. Converter output may be cut back.

Likely causes

Measuring circuit for channel C inside the converter defective
Loose connector or damaged sensing lead
Software fault in the converter or its controller

Symptoms

  • 12 V or converter warning, possibly with MIL
  • Start-stop or 12 V support restricted

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€50–1,500
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

dcdc voltage sensor cwiring harnessdcdc converter

Related codes

P0E97P0E98P0E99P0E9AP0E31P0E36

References: law.cornell.edu, gsi.ext.gm.com, static.nhtsa.gov.