P0172 (blink 26) on Toyota Passo (KGC10): Fuel trim system too rich (2-trip)
Short answer: P0172 means “Fuel trim system too rich (2-trip)”. The car’s computer has found a fault in the Engine control (EFI) system and turns on the Check engine light (MIL). First check: unit check B8-218/223: fuel pressure 324+/-5 kPa; injector 12 ohm, leak <=1 drop/min.
- Code
- P0172 · blink 26
- System
- Engine control (EFI)
- Dashboard light
- Check engine light (MIL)
- Also sold as
- Daihatsu Boon, Daihatsu Sirion (M300)
- Applies to
- 1KR-FE: M300 (Sirion export = JDM Boon M300S/M301S(4WD? see gaps) & Passo KGC10/KGC15). JDM-spec ECU not separately documented
- Confidence
- high (factory manual, export spec)
- Source
- carmanualsclub.com
Symptoms and when it is set
- MIL per chart B8-52..55
Likely causes
- Abnormal combustion pressure, injector or O2 sensor
What to check, in order
- Unit check B8-218/223: fuel pressure 324+/-5 kPa; injector 12 ohm, leak <=1 drop/min
Related on this car
- Stalling at idle with A/C + brake, hard start
- All fault codes for this car
- Warning lights
- Where the parts are (parts map)
- Common problems
Same code on other cars
- P0172 · Toyota Corolla (9th gen, E120)
- P0172 · Toyota Corolla (11th gen, E170)
- P0172 · Toyota Corolla (10th gen, E140)
- P0172 · Honda City (5th gen, GM2)
- P0172 · Honda Civic (10th gen, FC)
- P0172 · Suzuki Wagon R (Pakistan, K10B)
- P0172 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.