P0301 on Toyota Vitz (SCP10): Misfire in cylinder 1

Short answer: P0301 means “Misfire in cylinder 1”. The car’s computer has found a fault in the Engine - ignition system and turns on the Check engine light (MIL). First check: swap coil and plug with another cylinder.

Code

P0301

System

Engine - ignition

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. Spark plug
2. Ignition coil
3. Injector
4. Compression

What to check, in order

1. Swap coil and plug with another cylinder
2. Check injector
3. Check compression

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

• P0301 · Toyota Passo (1st gen)
• P0301 · Toyota Corolla (11th gen, E170)
• P0301 · Toyota Corolla (10th gen, E140)
• P0301 · Honda City (5th gen, GM2)
• P0301 · Honda Civic (10th gen, FC)
• P0301 · Suzuki Wagon R (Pakistan, K10B)
• P0301 on all cars compared

← P0300 P0302 →

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.