P1520 on Toyota Vitz (SCP10): Stop lamp switch signal

Short answer: P1520 means “Stop lamp switch signal”. The car’s computer has found a fault in the Engine system and turns on the Check engine light (MIL). First check: check brake lights work.

Code

P1520

System

Engine

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. Stop lamp switch
2. Wiring
3. Engine computer (ECM)

What to check, in order

1. Check brake lights work
2. Check stop lamp switch adjustment
3. Check 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

• P1520 · Toyota Corolla (9th gen, E120)
• P1520 on all cars compared

← P1656 P1600 →

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.