Powertrain, generic · Hybrid propulsion

P0B17 Hybrid/EV Battery Pack Voltage Sense B Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0B17 means pack voltage measurement B reads above its plausible maximum. Mercedes-Benz uses this exact code on the eSprinter 907: inaccurate BMS measurements can store P0B171C, voltage sensor B in the high-voltage battery module shorted to positive with the value out of range, together with P0ABD00 for sensor A. The result is an intermittent no-start or no Ready status, fixed by a BMS software update. GM checks channel A against 479 V on its BECM (P0ABD, Type A). CARB requires out-of-range monitoring of battery voltage sensors. The low counterpart is P0B16. A real overvoltage is not implied; the measurement itself is suspect.

Likely causes

BMS measurement inaccuracy, fixed by software update (Mercedes eSprinter)
Sense lead of channel B shorted to a higher potential
Measurement input of the battery controller defective

Symptoms

  • Vehicle may not reach Ready or may shut down the high-voltage system
  • MIL and hybrid/EV system warning on
  • Battery power limited, reduced electric drive or assist

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–2,500
Time0.5–6 h

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

Parts involved

hv battery pack voltage sense bwiring harnessbms

Related codes

P0B14P0B15P0B16P0B18P0ABDP0B1C

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