P0120 (blink 41, 1ZZ) on Toyota Corolla E120: THROTTLE/PEDAL POSITION
Short answer: P0120 means “THROTTLE/PEDAL POSITION”. The car’s computer has found a fault in the EFI 1ZZ-FE system and turns on the Malfunction indicator lamp (Check Engine). First check: workshop check order (RM821E): READ VALUE OF THROTTLE POS -> CHECK HARNESS AND CONNECTOR(CHECK VOLTAGE) -> CHECK THROTTLE POSITION SENSOR -> INSPECT ECU -> CHECK HARNESS AND CONNECTOR(ENGINE ECU−THROTTLE POSITION.
- Code
- P0120 · blink 41
- System
- EFI 1ZZ-FE
- Dashboard light
- Malfunction indicator lamp (Check Engine)
- Applies to
- 1ZZ-FE 1.8 (PK Altis 2005-08 ZZE122; JDM ZZE122/124, Allex/Runx/Fielder 1.8)
- Confidence
- high (official Toyota RM821E)
- Source
- toyotamanuals.gitlab.io
Symptoms and when it is set
- Condition (1) or (2) continues with more than 5 sec.: 1. VTA < 0.1 V 2. VTA > 4.9 V
Likely causes
- Open or short in throttle position sensor; Throttle position senor; Engine ECU
What to check, in order
- Workshop check order (RM821E): READ VALUE OF THROTTLE POS -> CHECK HARNESS AND CONNECTOR(CHECK VOLTAGE) -> CHECK THROTTLE POSITION SENSOR -> INSPECT ECU -> CHECK HARNESS AND CONNECTOR(ENGINE ECU−THROTTLE POSITION
Related on this car
Same code on other cars
- P0120 · Toyota Passo (1st gen)
- P0120 · Toyota Vitz (1st gen)
- 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.