P0115 (blink 22) on Toyota Vitz (SCP10): Engine coolant temperature sensor circuit

Short answer: P0115 means “Engine coolant temperature sensor circuit”. The car’s computer has found a fault in the Engine - ECT system and turns on the High coolant temperature light. First check: check sensor connector and wiring.

Code

P0115 · blink 22

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 · toyota-club.net

Likely causes

1. Open or short in coolant temperature sensor circuit
2. Coolant temperature sensor
3. Engine computer (ECM)

What to check, in order

1. Check sensor connector and wiring
2. Check sensor resistance cold and hot
3. Replace sensor if out of range

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

• P0115 · Toyota Passo (1st gen)
• P0115 · Toyota Corolla (9th gen, E120)
• P0115 · Toyota Corolla (11th gen, E170)
• P0115 · Toyota Corolla (10th gen, E140)
• P0115 · Honda City (5th gen, GM2)
• P0115 · Honda Civic (10th gen, FC)
• P0115 · Suzuki Wagon R (Pakistan, K10B)
• P0115 on all cars compared

← P0110/24 P0116 →

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.