Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2009 Toyota Yaris Base, 4D Sedan, AutomaticFACTORY OEM SERVICE PROCEDURE
Typical Enabling Conditions
M/T Case 1:
TYPICAL ENABLING CONDITIONS
| Monitor runs whenever following DTCs not present | None |
| Engine coolant temperature | 70°C (158°F) or more |
| Engine speed | 2,000 to 5,000 rpm |
| Engine load | 34.9 % or more |
| Fuel cut at high engine speed | Not executing |
| ECT sensor fail (P0115, P0117, P0118) | Not detected |
| MAF sensor fail (P0100, P0101, P0102, P0103) | Not detected |
M/T Case 2:
TYPICAL ENABLING CONDITIONS
| Monitor runs whenever following DTCs not present | None |
| Idle | ON |
| Fuel cut | ON |
A/T:
TYPICAL ENABLING CONDITIONS
| Monitor runs whenever following DTCs not present | None |
| Either of following condition (a) or (b) met: | - |
| (a) Following conditions 1 and 2 met: | - |
| 1. ECT and ECT sensor | 20°C (68°F) or more, and sensor does not malfunction (P0115 or P00117, P0118, P0125) |
| 2. Time after PNP switch turned OFF | 10 seconds or more |
| TP sensor fail (P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135) | Not detected |
| (b) Following conditions 1 and 2 met: | - |
| 1. ECT and ECT sensor | Less than 20°C (68°F), and sensor malfunction (P0115 or P0117, P0118, P0125) |
| 2. Time after PNP switch turned OFF | 30 seconds or more |
| TP sensor fail (P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135) | Not detected |
| Engine speed | 2,080 rpm or more (varies with throttle valve opening angle) |
| Fuel cut at high engine speed | Not executing |
| Time after ignition switch turned to ON | 0.5 seconds or more |
| TP sensor learning | Completed |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.