OBD-II code · Powertrain (generic)
P0A99 Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit Low
The HV battery pack cooling fan 2 reports a control circuit low condition. Battery thermal management is impaired.
Is it safe to drive with P0A99?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWire shorted to ground
- PossibleInternal motor short
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Hybrid Battery Cooling Fan 2, Wiring Harness, Bms
Related codes
- P0A96Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit/Open
- P0A97Hybrid/EV Battery Pack Cooling Fan 2 Performance/Stuck Off
- P0A98Hybrid/EV Battery Pack Cooling Fan 2 Stuck On
- P0A9AHybrid/EV Battery Pack Cooling Fan 2 Control Circuit High
- P0A9BHybrid/EV Battery Temperature Sensor A Circuit
- P0A9CHybrid/EV Battery Temperature Sensor A Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.