P2B32: Fan 2 Stuck On | Causes and fixes

With P2B32 the controller finds that the second radiator fan keeps operating, or does not change state, against its command. On conventional cars this usually traces back to a relay stuck closed, a fan 2 control line shorted to its active level or a module that has lost control of the motor. Audi documents P2B32 for the RS e-tron GT and the plain e-tron GT of model years 2022 to 2024 as symptom 59342 in thermal management J1024: debris entering via the wheel housing liner blocks the fan, which leads to poor cabin climate, reduced drive power or incomplete charging; the cure is a revised fan, shroud and liner set for the affected side. CARB requires fan outputs to be checked for correct reaction to commands. A fan that never stops may also drain the 12 V battery. P2B31 covers fan 2 doing too little, P2B30 fan 1 stuck on.

Medium severity. Can I keep driving?Watch the temperature gauge. If it climbs or a warning appears, stop the car in a safe place and turn off the engine: overheating can cause serious damage.

Symptoms

Fan audible after the vehicle is switched off
Reduced heating, cooling or charging on electric vehicles
Flat 12 V battery after parking

Most likely causes

Debris from the wheel housing jamming fan 2 (Audi e-tron GT)
Fan 2 relay stuck closed
Fan 2 control line shorted to its active level

What to check, in order

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

With the engine cold, check the coolant level; never do this when the system is hot
Use the scanner to command the movement and compare the actual position with the requested one.
Check the actual temperature in live data
Make sure the fan comes on when it should
Check the thermostat and connector
Measure the sensor and replace it if its readings do not make sense

Good to know

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

What each character of P2B32 means

P: Powertrain: engine and transmission
2: Generic code: same on every make
B: Subsystem depends on the code range
32: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2B32?

Watch the temperature gauge. If it climbs or a warning appears, stop the car in a safe place and turn off the engine: overheating can cause serious damage.

What causes code P2B32?

The most common causes are: debris from the wheel housing jamming fan 2 (Audi e-tron GT); fan 2 relay stuck closed; fan 2 control line shorted to its active level.

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.