P0D5F: Hybrid/EV Battery Pack Cooling Fan 2 Sense Circuit

What it means

The HV battery pack cooling fan 2 sense circuit reports a sense circuit/open fault.

At a glance

• Usually lights the check-engine light
• The engine or gearbox may go into limp mode

How it works

Battery pack cooling fan 2 moves air to help control high-voltage battery temperature, while its sense circuit reports fan-speed feedback to the control module. P0D5F sets when that feedback circuit is detected as open, so the module cannot reliably confirm fan 2 speed.

Common causes

Most likely first.

1. Open in sense wire
2. Fan tachometer failed
3. Pin pushed back out of connector body

Symptoms

• EV/hybrid system warning light on
• Reduced power output or limp mode
• Charging may fail or be slowed
• Reduced electric range

How to diagnose it

1. Save freeze-frame data and scan for related battery cooling or fan codes to see when the fan 2 feedback fault occurred.
2. Use live data to compare the commanded state and reported speed of battery cooling fan 2, if available.
3. Inspect the fan 2 sense-wire route and connector for damage, corrosion, a loose lock, or a terminal pushed back into the connector.
4. Check continuity through the fan 2 sense wire and its connections using the manufacturer's circuit test procedure.
5. If the wiring is intact, test fan 2 tachometer feedback and the control-module input according to the vehicle-specific service information.

Common fixes

• Reseat the fan 2 connector and restore any backed-out terminal.
• Repair an open or damaged fan 2 sense wire.
• Clean or replace corroded fan 2 connector terminals.
• Replace the fan 2 assembly if its tachometer output is confirmed faulty.

Can I keep driving?

Limit driving, especially in hot weather, at high speed, or under heavy load, because the battery may not be cooled correctly and the vehicle may reduce power. If a hybrid/EV warning or reduced-power mode appears, stop safely and follow the vehicle's instructions.