P0120 (blink 41) on Toyota Passo (KGC10): Throttle/Pedal Position Sensor
Short answer: P0120 means “Throttle/Pedal Position Sensor”. The car’s computer has found a fault in the Engine control (EFI) system and turns on the Check engine light (MIL). First check: are the signals from the throttle position sensor inputted to the EFI ECU?.
- Code
- P0120 · blink 41
- 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 | K3-VE: M301 (Sirion 1.3 = JDM Boon M310S? / Passo QNC10)
- Confidence
- high (factory manual, export spec)
- Source
- carmanualsclub.com
Symptoms and when it is set
- When the signals from the throttle position are not outputted continuously after starting over a certain length of time.
Likely causes
- Open wire or short circuit in the throttle position sensor circuit.
- Throttle position sensor
- EFI ECU
What to check, in order
- Are the signals from the throttle position sensor inputted to the EFI ECU?
- Is the harness between the throttle position sensor and the EFI ECU normal?
- Is the power supply voltage of the throttle position sensor normal?
- Is the output of the throttle position sensor normal?
Related on this car
Same code on other cars
- P0120 · Toyota Vitz (1st gen)
- P0120 · Toyota Corolla (9th gen, E120)
- P0120 · Toyota Corolla (11th gen, E170)
- P0120 · Toyota Corolla (10th gen, E140)
- P0120 · Honda City (5th gen, GM2)
- P0120 · Honda Civic (10th gen, FC)
- P0120 · Suzuki Wagon R (Pakistan, K10B)
- P0120 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.