Cause
Faulty hybrid battery cooling fan
The fan that is most of the traction battery's cooling system, misbehaving — and "faulty" here means choked more often than broken. The fan breathes cabin air through a floor-level intake that inhales dust, fibre and pet hair for years, so the classic finding is a rotor packed with felt, dragging far below design speed while measuring electrically fine. Cleaning precedes condemnation, and a replacement fitted behind a blocked intake fails the same way.
The stakes are asymmetric: the fan is a modest part, but heat is what ages battery packs, so a fan quietly underperforming for two summers can cost a four-figure pack. That is why the fan codes deserve more urgency than their symptom-free presentation suggests — and why a battery deterioration verdict should always prompt the question of whether the fan ever got cleaned.
Typically a moderate job.
Codes this can cause (34)
Codes where this is a likely explanation first, rather than merely a possible one.
- P0A7B Battery Energy Control Module Requested Malfunction Indicator Lamp Illumination Likely for this code Moderate
- P0A7E Hybrid/EV Battery Pack A Over Temperature Likely for this code High
- P0A81 Hybrid/EV Battery Pack Cooling Fan 1 Control Circuit/Open Likely for this code Moderate
- P0A82 Hybrid/EV Battery Pack Cooling Fan 1 Performance/Stuck Off Likely for this code High
- P0A83 Hybrid/EV Battery Pack Cooling Fan 1 Stuck On Likely for this code Moderate
- P0A84 Hybrid/EV Battery Pack Cooling Fan 1 Control Circuit Low Likely for this code Moderate
- P0A96 Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit/Open Likely for this code Moderate
- P0A97 Hybrid/EV Battery Pack Cooling Fan 2 Performance/Stuck Off Likely for this code High
- P0A98 Hybrid/EV Battery Pack Cooling Fan 2 Stuck On Likely for this code Moderate
- P0A99 Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit Low Likely for this code Moderate
- P0ACF Hybrid/EV Battery Pack Cooling Fan 3 Control Circuit/Open Likely for this code Moderate
- P0AD0 Hybrid/EV Battery Pack Cooling Fan 3 Performance/Stuck Off Likely for this code High
- P0AD1 Hybrid/EV Battery Pack Cooling Fan 3 Stuck On Likely for this code Moderate
- P0AD2 Hybrid/EV Battery Pack Cooling Fan 3 Control Circuit Low Likely for this code Moderate
- P0AD4 Hybrid/EV Battery Pack Air Flow System Insufficient Air Flow Likely for this code High
- P0BC7 Hybrid/EV Battery Pack Cooling Fan 1 Sense Circuit/Open Likely for this code High
- P0BC8 Hybrid/EV Battery Pack Cooling Fan 1 Sense Range/Performance Likely for this code High
- P0BC9 Hybrid/EV Battery Pack Cooling Fan 1 Sense Circuit Low Likely for this code High
- P0BCA Hybrid/EV Battery Pack Cooling Fan 1 Sense Circuit High Likely for this code High
- P0BCB Hybrid/EV Battery Pack Cooling Fan 1 Sense Circuit Intermittent/Erratic Likely for this code High
- P0C32 Hybrid/EV Battery Cooling System A Performance Likely for this code High
- P0D5F Hybrid/EV Battery Pack Cooling Fan 2 Sense Circuit/Open Likely for this code Moderate
- P0D60 Hybrid/EV Battery Pack Cooling Fan 2 Sense Range/Performance Likely for this code Moderate
- P0D61 Hybrid/EV Battery Pack Cooling Fan 2 Sense Circuit Low Likely for this code Moderate
- P0D62 Hybrid/EV Battery Pack Cooling Fan 2 Sense Circuit High Likely for this code Moderate
Information, not instruction
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