P0D5F

Code

Generic P — Powertrain

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

Brand: Generic

Type: P — Powertrain

Views: UK: 17 EN: 27 RU: 17

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Open or corroded connector at fan 2
Broken or chafed wiring between fan and battery thermal control module
Faulty cooling fan assembly (bad tach/sensor, internal open)
Blown fuse or faulty relay supplying the fan circuit or its electronics
Intermittent ground or supply to the fan
Faulty battery thermal management/control module or software fault

Symptoms

Cooling fan #2 not running when expected
Battery thermal management warnings or reduced HVAC/battery cooling performance
Possible battery pack derate or reduced charging/discharging capability
DTC illuminated (check hybrid/EV warning or MIL depending on vehicle)
No audible fan noise from the side where fan 2 is located

What to check

Retrieve freeze frame/fault data and confirm DTC is current (not historical)
Visual inspection of fan 2 connector and wiring for damage, corrosion, or loose pins
Check related fuses and relays for the fan circuit
Command fan 2 ON from service tool (when safe to do so) and observe response
Measure voltage at the fan connector with the fan commanded ON and OFF
Measure continuity/resistance of the sense lead between fan connector and control module with ignition off

Signal parameters

Supply voltage to fan: typically vehicle 12 V (0 V when off, ~12 V when commanded on) — verify with specific vehicle manual
Sense/tach output: pulsed waveform when fan spins (frequency proportional to RPM) or a DC feedback voltage — expect 0 V (open) if fan not running
Open-circuit condition: infinite or very high resistance on sense conductor to module
Short condition: near 0 Ω to ground or supply if shorted — will show corresponding voltage deviation

Diagnostic algorithm

Confirm DTC P0D5F presence and any related codes. Note freeze-frame and conditions (ignition state, temperatures, battery SOC).
Perform a visual inspection of fan #2 connector, pins and harness routing. Look for corrosion, water ingress, pin damage, or chafing.
With vehicle in a safe state and following HV safety procedures for hybrids/EVs, disconnect the fan connector and inspect pins. Reconnect and wiggle-test while monitoring the sense line for intermittent faults.
Check fuses and relays for the cooling fan circuit. Replace any blown fuses and re-test.
Command the fan ON with a diagnostic scanner (or activate cooling demand) and measure supply voltage at the fan power pin. Verify ground presence. If no supply, trace back to relay/fuse/module.
With fan commanded ON and connected, measure the sense/tach line at the fan connector for a pulsed signal or expected voltage. If no pulses and power present, suspect faulty fan assembly.
If no power at connector but module is commanding the fan, check continuity and resistance of wiring between the battery thermal control module and the fan connector. Repair any opens/shorts.
If wiring and connector are good but no sense signal, bench-test or replace the fan assembly per manufacturer procedure. Some fans require full replacement if tach sensor internal.
If fan and wiring test good, test output and input at the battery thermal management/control module. Repair or replace module only after exhausting external wiring and component checks.
After repair, clear codes, perform functional test and road or thermal-cycle test to confirm fault does not return. Document repair and advise follow-up if intermittent symptoms persist.

Likely causes

Connector contamination or corrosion at the fan motor
Damaged wiring harness near wheelwell or hinge points
Failed fan tachometer or internal electronics inside fan assembly
Open circuit in the sense lead due to connector pin pushed out
Fault in fan power supply (fuse/relay) causing no motor operation and no sense signal

Fault status

⚠️ Status

Hybrid/EV Battery Pack Cooling Fan 2 Sense Circuit — Open or no feedback detected. Control module not receiving expected tach/sense signal from fan 2; cooling may be impaired and protective strategies may be active.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours