P1126
Thermostat Function
2003-2008 Infiniti FX35 3.5L V6
Moderate SeverityPowertrain
Description
Engine coolant temperature not reaching expected operating temperature.
Symptoms
- CEL
- Engine runs cold
- Poor efficiency
- Weak heater
- Slow warm-up
Common Causes
- Thermostat stuck open
- Faulty ECT sensor
- Air in cooling system
- Low coolant
Diagnostic Steps
- Monitor coolant temp
- Test thermostat
- Check ECT sensor
- Inspect cooling system
Repair Notes
Replace thermostat.
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0001Fuel Volume Regulator Control Circuit/Open
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
P1126 on Other Vehicles
Common Questions
What does code P1126 mean on a 2003-2008 Infiniti FX35?
P1126 stands for "Thermostat Function". Engine coolant temperature not reaching expected operating temperature.
What are the symptoms of P1126 on a Infiniti FX35?
Common symptoms of P1126 include: CEL, Engine runs cold, Poor efficiency, Weak heater, Slow warm-up.
What causes P1126 on a 2003-2008 Infiniti FX35?
Common causes of P1126 include: Thermostat stuck open, Faulty ECT sensor, Air in cooling system, Low coolant.