Short to voltage or damaged wiring on the fan 2 sense or feedback circuit; Corroded, loose or damaged connector at the fan or control module; Faulty battery cooling fan 2 or its internal speed feedback electronics; Blocked or restricted fan, intake duct or filter causing abnormal feedback; Fault in the battery control module or fan control driver; Low or unstable supply voltage from a weak 12 V battery or poor earth; Outdated control unit software where the manufacturer has issued a fix for this fault.

P0D62

Hybrid/EV Battery Pack Cooling Fan 2 Sense Circuit High.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
D: AreaReserved
62: FaultThe specific fault in that area

What it means

P0D62 is a generic powertrain code meaning the control unit has detected a high voltage or signal level on the sense (feedback) circuit of the hybrid or EV battery pack cooling fan 2. The module monitors the fan's speed or status feedback and has seen a reading above the expected range, which points to a wiring, sensor or fan control fault. The exact fan location and circuit layout depend on the model.

Symptoms

Hybrid or EV system warning light or malfunction indicator lit
Battery pack running hotter than normal or cooling fan noise changing
Cooling fan 2 running constantly, not running at all or running at the wrong speed
Reduced power or limited charging and regeneration in hot conditions
Reduced electric-only range or hybrid system limp mode

Possible causes

Short to voltage or damaged wiring on the fan 2 sense or feedback circuitlikely
Corroded, loose or damaged connector at the fan or control modulelikely
Faulty battery cooling fan 2 or its internal speed feedback electronicslikely
Blocked or restricted fan, intake duct or filter causing abnormal feedbackpossible
Fault in the battery control module or fan control driverpossible
Low or unstable supply voltage from a weak 12 V battery or poor earthpossible
Outdated control unit software where the manufacturer has issued a fix for this faultrare

How to diagnose

Read all stored codes and freeze frame data, noting battery temperature, vehicle state and any other fan or battery codes.
Check for manufacturer service bulletins for the model and note any related software updates.
Inspect the fan 2 wiring, connectors and the cooling intake duct for damage, water ingress, debris or blockage.
Test the 12 V battery condition and charging voltage, and check the relevant earth connections.
Listen for the fan and use a bidirectional scan function, if available, to command fan 2 on and off and watch the live feedback value.
Following the manufacturer's wiring diagram and safe high-voltage procedures, check the sense circuit for short to voltage, open circuit and resistance, and check the fan supply and earth.
Compare readings from fan 2 with the other fan if fitted, to see whether the fault is in the fan or the circuit.
If wiring and fan check out, consider a fault in the control module only after confirming the supply and signal integrity.

How to fix

Repair or replace damaged wiring and clean or replace corroded connectors on the sense circuit.
Replace battery cooling fan 2 if its feedback or operation is faulty.
Clear blocked ducts, filters or debris from the battery cooling air path.
Restore correct 12 V supply by charging or replacing a weak battery and repairing poor earths.
Replace or reprogram the controlling module, or apply a manufacturer software update, only once other causes are ruled out or a known fix exists.

Can I keep driving?

Medium severity

The car can usually be driven for a short time, but the battery may overheat and the system may limit power, so have it checked soon. Stop driving if a hybrid system overheating warning appears or the car goes into limp mode.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.