P0116 on Toyota Vitz (SCP10): Coolant temperature sensor range / performance

Short answer: P0116 means “Coolant temperature sensor range / performance”. The car’s computer has found a fault in the Engine - ECT system and turns on the High coolant temperature light. First check: check coolant level.

Code

P0116

System

Engine - ECT

Dashboard light

High coolant temperature light · Check engine light (MIL) · Low coolant temperature light (blue)

Also sold as

Toyota Yaris, Toyota Echo (XP10)

Applies to

1SZ-FE (by platform)

Confidence

medium (Toyota Echo 1999–2002 factory diagnostics, same XP10 platform; not confirmed on JDM 1SZ-FE)

Source

carmanualsclub.com

Likely causes

1. Coolant temperature sensor
2. Thermostat stuck open
3. Cooling system

What to check, in order

1. Check coolant level
2. Check thermostat opens at the right temperature
3. Check sensor reading against a thermometer

Related on this car

• All fault codes for this car
• Warning lights
• Where the parts are (parts map)
• Common problems

Same code on other cars

• P0116 · Toyota Passo (1st gen)
• P0116 · Toyota Corolla (11th gen, E170)
• P0116 · Toyota Corolla (10th gen, E140)
• P0116 · Honda City (5th gen, GM2)
• P0116 · Honda Civic (10th gen, FC)
• P0116 · Suzuki Wagon R (Pakistan, K10B)
• P0116 on all cars compared

← P0115/22 P0120/41 →

Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.