Powertrain
generic / SAE
P0BC9
Hybrid/EV Battery Pack Cooling Fan 1 Sense Circuit Low
The HV battery pack cooling fan 1 sense circuit reports a sense circuit low fault. Fan speed feedback is unreliable.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberB / C9
Possible causes
- Sense wire shorted to ground high
- Tachometer internal short medium
- Connector pins corroded - high contact resistance low
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 100–600 €
- Estimated time: 0.5–3 h
- Component: hv battery cooling fan 1 sense
- Component: wiring harness
- Component: bms
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012