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Home/DTC Codes/Pontiac/Sunfire/1995-2005 2.2L I4/P0116
P0116

ECT Sensor 1 Circuit Range/Performance

1995-2005 Pontiac Sunfire 2.2L I4

Moderate SeverityPowertrainGeneric (SAE)

Description

The ECT sensor reading is not changing appropriately as the engine warms up.

Symptoms

  • Check Engine Light
  • Poor fuel economy
  • Overheating concern
  • Fan issues

Common Causes

  • Stuck thermostat
  • Faulty ECT sensor
  • Air pocket in cooling system
  • Low coolant

Diagnostic Steps

  1. Monitor ECT warmup curve
  2. Test thermostat
  3. Check for air in system
  4. Test sensor

Repair Notes

Replace thermostat or ECT sensor. Bleed cooling system.

Related Codes

P0115Engine Coolant Temperature (ECT) Sensor 1 CircuitP0117ECT Sensor 1 Circuit Low InputP0128Coolant Thermostat Below Regulating Temperature

Other Powertrain Codes

P0116 on Other Vehicles

Pontiac Aztek

2001-2005 3.4L V6

Pontiac Bonneville

1990-1999 3.8L V6

Pontiac Bonneville

2000-2005 3.8L V6

Pontiac Bonneville GXP

2000-2005 4.6L V8

Pontiac Bonneville GXP

2000-2005 4.6L V8 Northstar

Pontiac Bonneville SSEi

1992-1999 3.8L Supercharged V6

Pontiac Bonneville SSEi

1992-1999 3.8L V6 Supercharged

Pontiac Firebird

1993-1997 3.4L V6

Common Questions

What does code P0116 mean on a 1995-2005 Pontiac Sunfire?

P0116 stands for "ECT Sensor 1 Circuit Range/Performance". The ECT sensor reading is not changing appropriately as the engine warms up.

What are the symptoms of P0116 on a Pontiac Sunfire?

Common symptoms of P0116 include: Check Engine Light, Poor fuel economy, Overheating concern, Fan issues.

What causes P0116 on a 1995-2005 Pontiac Sunfire?

Common causes of P0116 include: Stuck thermostat, Faulty ECT sensor, Air pocket in cooling system, Low coolant.

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