Powertrain, generic

P0E48 Hybrid/EV Battery Pack Voltage Sense E Circuit Intermittent/Erratic

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0E48 marks pack voltage measurement E as unsteady: the signal jumps, drops out for fractions of a second or changes faster than a battery voltage can, and then returns to normal. Because the fault comes and goes, it is often found only as a stored code after a brief warning. No manufacturer documents P0E48 publicly, and GM's published hybrid tables, for example those of the 2013 two-mode trucks, test pack voltage only for low, high and rationality faults on channel A. CARB requires circuit monitoring of battery voltage sensors in the energy storage system. Steady faults of the same channel are P0E44 to P0E47; channel F uses P0E4D for this fault type. Loose or corroded sense terminals and chafed leads that react to vibration or heat are the usual suspects.

Likely causes

Loose, pushed-back or corroded terminal on the channel E sense lead
Chafed sense lead that shorts briefly under vibration
Intermittent fault in the battery controller input

Symptoms

  • Warning light that comes and goes
  • Brief losses of electric power, often on rough roads
  • Stored code without a current fault

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–2,000
Time1–6 h

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

Parts involved

hv battery pack voltage sense ewiring harnessbms

Related codes

P0E44P0E45P0E46P0E47P0E4DP0ABE

References: law.cornell.edu, gsi.ext.gm.com.