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

Where a traction battery is cooled by two fans, each one can report its actual speed back to the controller on a separate sense line. P0D5F is the general circuit code for that return path of fan 2: the line is open or delivers nothing the controller can evaluate. No manufacturer documents P0D5F publicly. Volkswagen's 2014 Touareg Hybrid reads the same fan 2 feedback as a voltage but only defines P0D60 to P0D62, and Toyota patents show why the signal matters: measured fan speed is compared with the speed the duty command should give. CARB requires electrical inputs of battery thermal management to be monitored. Fan 2 may keep turning, yet its operation can no longer be confirmed, so the pack may be protected by reduced power. Drive-side faults of fan 2 are P0A96 and its siblings; fan 1 feedback uses P0BC7 to P0BCB.

High severity. Can I keep driving?If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

Symptoms

Hybrid system warning or check engine light
Reduced electric assist or charging power when the battery warms up
Often no noticeable change while fan 2 still runs

Most likely causes

Broken feedback wire or terminal pushed out at the fan 2 connector
Corroded or loose connector between fan 2 and the battery controller
Speed signal output inside the fan 2 motor electronics failed
Feedback input of the battery control module defective

What to check, in order

Start with the simplest. You can tick off each step.

Read the codes with a hybrid-compatible scanner and write down the freeze frame data
Check the continuity of the wire between the component and the control module.
Make sure the battery cooling air intake is clean
Check the 12 V auxiliary battery, which can also trigger warnings
Leave any high-voltage measurements to a specialized repair shop

Good to know

Repair difficulty: medium
It can trigger limp mode.
It affects emissions.

What each character of P0D5F means

P: Powertrain: engine and transmission
0: Generic code: same on every make
D: Subsystem depends on the code range
5F: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0D5F?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P0D5F?

The most common causes are: broken feedback wire or terminal pushed out at the fan 2 connector; corroded or loose connector between fan 2 and the battery controller; speed signal output inside the fan 2 motor electronics failed.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.