U0101 (blink 82) on Toyota Passo (KGC10): E-At Abnormal Reception
Short answer: U0101 means “E-At Abnormal Reception”. The car’s computer has found a fault in the Engine control (EFI) system and turns on the Check engine light (MIL). First check: is the harness between EFI ECU - A/T ECU normal?.
- Code
- U0101 · blink 82
- System
- Engine control (EFI)
- Dashboard light
- Check engine light (MIL)
- Also sold as
- Daihatsu Boon, Daihatsu Sirion (M300)
- Applies to
- K3-VE: M301 (Sirion 1.3 = JDM Boon M310S? / Passo QNC10)
- Confidence
- high (factory manual, export spec)
- Source
- carmanualsclub.com
What to check, in order
- Is the harness between EFI ECU - A/T ECU normal?
- Is the A/T ECU normal?
- Check whether there is any poor contact at the connector section.
Related on this car
Same code on other cars
- U0101 · Toyota Corolla (11th gen, E170)
- U0101 · Toyota Corolla (10th gen, E140)
- U0101 · Honda City (5th gen, GM2)
- U0101 · Honda Civic (10th gen, FC)
- U0101 · Suzuki Wagon R (Pakistan, K10B)
- U0101 on all cars compared
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.

