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 Matrix Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Typical Enabling Conditions
Engine Coolant Temperature Sensor Cold Start Monitor
TYPICAL ENABLING CONDITIONS CHART
| Monitor runs whenever following DTCs not present | P0102 to P0103: Mass air flow meter P0110 to P0113: Intake air temperature sensor |
| Battery voltage | 10.5V or more |
| Time after engine start | 1 second or more |
| Engine coolant temperature at engine start | Less than 60°C (140°F) |
| Intake air temperature sensor circuit | OK |
| Soak time | 0 or more |
| Accumulated mass air flow | 825 g or more (Manual transaxle), 1422 g or more (Automatic transaxle) |
| Fuel cut | OFF |
| Difference between engine coolant temperature at engine start and intake air temperature | Less than 40°C (72°F) |
Engine Coolant Temperature Sensor Soak Monitor
TYPICAL ENABLING CONDITIONS CHART
| Monitor runs whenever following DTCs not present | P0102 to P0103: Mass air flow meter |
| Battery voltage | 10.5 V or more |
| Engine | Running |
| Soak time | 5 hours or more |
| Either (a) or (b) condition met | - |
| (a) Engine coolant temperature | 60°C (140°F) or more |
| (b) Accumulated mass air flow | 1661 g or more (Manual transaxle), 3185 g or more (Automatic transaxle) |
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.