Powertrain, generic · Hybrid propulsion

P0AD6 Hybrid/EV Battery Pack Air Flow Valve A Control Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0AD6 flags that the air flow valve A of the battery cooling does not behave as expected: the circuit is intact, but position, travel or the learned end stops do not fit the command. Audi documents exactly this code as P0AD600 on the 2012-15 Q5 hybrid (TSB 2038152): a software error made the battery management module J841 lose the learned end stops of the air supply valve, electric and hybrid drive were disabled, and a software update to version 0543 fixed it. CARB 1968.2 calls for functional monitoring of battery thermal management. Pure circuit faults are P0AD5, P0AD7 and P0AD8. Besides software, a sticking flap or a slipping actuator can cause it.

Likely causes

Battery controller software loses learned end stops (Audi Q5 hybrid, fixed by update)
Flap binding from dirt or a deformed duct
Actuator gears or position feedback worn
End stops not relearned after battery or actuator work

Symptoms

  • Hybrid drive system error message in the cluster
  • Electric and hybrid operation no longer available
  • Check engine light on

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–500
Time0.3–2.5 h

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

Parts involved

hv battery air flow valve awiring harnessbms

Related codes

P0AD5P0AD7P0AD8P0AD4

References: law.cornell.edu, static.nhtsa.gov, static.nhtsa.gov.