Powertrain, generic · Hybrid propulsion

P0A82 Hybrid/EV Battery Pack Cooling Fan 1 Performance/Stuck Off

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

This code covers a fan 1 that is electrically intact but does not deliver the requested cooling, up to standing still. No manufacturer publishes code-exact criteria; CARB requires a functional check of battery cooling where feasible. Typical methods: GM compares commanded and fed-back fan speed (filed under its own sense code P0BC8), Toyota flags a fan whose feedback-corrected duty deviates too far from the expected value, and Honda compares expected and measured battery temperature rise. Causes are mostly mechanical: dust on the blades, a clogged intake filter, worn bearings. Circuit faults use P0A81/P0A84/P0A85; the stuck-on case is P0A83. The pack runs hotter and power may be limited.

Likely causes

Dust or debris on fan blades or in the duct
Clogged or covered battery air intake or filter
Worn or seized fan motor bearings
Faulty fan speed feedback signal

Symptoms

  • Hybrid warning or check engine light
  • Fan audibly weak or silent under load
  • Reduced electric assist in warm weather

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–600
Time0.5–3 h

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

Parts involved

battery cooling fanfan motorair duct

Related codes

P0A81P0A83P0BC8P0A97P0C32P0A7E

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