Powertrain, generic (extended)

P2B30 Fan 1 Stuck On

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2B30 states that radiator fan 1 does not follow the command to stop or to change speed, as judged from its speed feedback or module diagnosis. The classic electrical background is a welded relay contact or a fan module that keeps driving the motor. Audi uses the code on the 2022–2024 e-tron GT and RS e-tron GT, stored in thermal management J1024 (address 00C5) as symptom 59328: road dirt and stones entering through the wheel housing liner grille block the fan mechanically, so commanded and reported operation no longer match. Owners notice weak cabin heating or cooling, less drive power or a battery that will not charge fully. Audi fits revised fans, shrouds, liners and protective caps. CARB requires fan outputs to respond correctly to commands. Fan 2 has P2B32, the stuck-off case of fan 1 is P2B2F.

Likely causes

Road debris jamming the fan (Audi e-tron GT)
Fan relay contacts welded closed
Fan control module ignoring the off command

Symptoms

  • Fan keeps running after switch-off, draining the 12 V battery
  • Weak cabin heating or cooling on electric vehicles
  • Grinding noise from the front wheel area

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€30–1,200
Time0.5–4 h

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

Parts involved

cooling fan 1fan relay 1ecm

Related codes

P2B2FP2B32P0480P0692P0495

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