P0482moderate severityPowertrain
Cooling Fan 3 Control Circuit
on 1998 Toyota Tacoma 2.7L I4 · RWD
What this code means
The PCM has detected a fault in the control circuit for cooling fan 3. This may reduce cooling performance and lead to overheating under load.
Symptoms
- Engine overheating
- Cooling fan 3 not operating
- Poor AC cooling
Common causes
- Faulty cooling fan relay
- Damaged wiring or connector
- Failed cooling fan motor
- Faulty PCM
Diagnostic steps
- Scan for related codes
- Inspect fan 3 wiring and connectors
- Test fan 3 relay operation
- Check fan motor and PCM output
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0004
Fuel Volume Regulator Control Circuit High
P0005
Fuel Shutoff Valve A Control Circuit/Open
P0005
Fuel Shutoff Valve A Control Circuit/Open