P1126moderate severityPowertrain
Thermostat Function
on 2021 Nissan NV3500 5.6L V8 · FWD
What this code means
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 on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1