P1780 on Toyota Vitz (SCP10): Park / neutral position switch

Short answer: P1780 means “Park / neutral position switch”. The car’s computer has found a fault in the AT system and turns on the Check engine light (MIL). First check: check switch adjustment on the gearbox.

Code

P1780

System

AT

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. Park/neutral position switch out of adjustment or faulty
2. Wiring

What to check, in order

1. Check switch adjustment on the gearbox
2. Check switch continuity in each position
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

• P1780 · Toyota Passo (1st gen)
• P1780 · Toyota Corolla (9th gen, E120)
• P1780 on all cars compared

← P0773 C0200 →

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.