Powertrain, generic · Hybrid propulsion

P0D5F Hybrid/EV Battery Pack Cooling Fan 2 Sense Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Where a traction battery is cooled by two fans, each one can report its actual speed back to the controller on a separate sense line. P0D5F is the general circuit code for that return path of fan 2: the line is open or delivers nothing the controller can evaluate. No manufacturer documents P0D5F publicly. Volkswagen's 2014 Touareg Hybrid reads the same fan 2 feedback as a voltage but only defines P0D60 to P0D62, and Toyota patents show why the signal matters: measured fan speed is compared with the speed the duty command should give. CARB requires electrical inputs of battery thermal management to be monitored. Fan 2 may keep turning, yet its operation can no longer be confirmed, so the pack may be protected by reduced power. Drive-side faults of fan 2 are P0A96 and its siblings; fan 1 feedback uses P0BC7 to P0BCB.

Likely causes

Broken feedback wire or terminal pushed out at the fan 2 connector
Corroded or loose connector between fan 2 and the battery controller
Speed signal output inside the fan 2 motor electronics failed
Feedback input of the battery control module defective

Symptoms

  • Hybrid system warning or check engine light
  • Reduced electric assist or charging power when the battery warms up
  • Often no noticeable change while fan 2 still runs

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€40–500
Time0.5–2.5 h

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

Parts involved

hv battery cooling fan 2 sensewiring harnessbms

Related codes

P0D60P0D61P0D62P0D63P0BC7P0A96

References: law.cornell.edu, patents.google.com, static.nhtsa.gov.