Powertrain, generic (extended)

P2E6D Hybrid/EV Battery Pack A Cell Thickness Sensor Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2E6D says the signal from the cell thickness sensor of pack A sits above the range the controller accepts as a real reading. The code describes the voltage, not swollen cells. No manufacturer documents P2E6D publicly, and how such a sensor is built varies: a Ford patent uses a resistive gauge on a thinned cell wall whose resistance climbs as the wall bulges, LG uses a fibre grid read by a photoresistor, and classic strain gauges are read through a Wheatstone bridge. With a pull-up input, an open wire or lost ground drives the value high; a short to a supply can do the same. Ford's BECM keeps the contactors open if a self-check finds cells no longer monitored. CARB wants separate codes for low and high out-of-range faults; low is P2E6E.

Likely causes

Open signal or ground wire, unplugged or corroded connector inside pack A
Signal wire chafed against a supply or reference line
Thickness or pressure sensing element itself failed open

Symptoms

  • Hybrid or EV warning light
  • Power or charging limited as a precaution
  • In some designs the vehicle will not go to READY

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€150–2,500
Time1.5–8 h

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

Parts involved

hybrid battery pack ahybrid battery pack a thickness sensorbms

Related codes

P2E6CP2E6EP2E6FP2E71

References: law.cornell.edu, image-ppubs.uspto.gov, en.wikipedia.org, image-ppubs.uspto.gov.