P0505 on Toyota Vitz (SCP10): Idle speed control system

Short answer: P0505 means “Idle speed control system”. The car’s computer has found a fault in the Engine - idle system and turns on the Check engine light (MIL). First check: clean throttle body and idle valve.

Code

P0505

System

Engine - idle

Dashboard light

Check engine light (MIL)

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. Idle speed control valve dirty or faulty
2. Air leak
3. Throttle body dirty

What to check, in order

1. Clean throttle body and idle valve
2. Check for air leaks
3. Check idle valve wiring

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

• P0505 · Toyota Passo (1st gen)
• P0505 · Toyota Corolla (9th gen, E120)
• P0505 · Toyota Corolla (11th gen, E170)
• P0505 · Toyota Corolla (10th gen, E140)
• P0505 · Honda City (5th gen, GM2)
• P0505 · Honda Civic (10th gen, FC)
• P0505 · Suzuki Wagon R (Pakistan, K10B)
• P0505 on all cars compared

← P0500/42 P1300/14 →

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.