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.
2008 Toyota Prius BaseFACTORY OEM SERVICE PROCEDURE
Typical Enabling Conditions
TYPICAL ENABLING CONDITIONS
| The monitor will run whenever the following DTCs are not present | P0115 - P0118 (ECT sensor) P0120 - P0223, P2135 (TP sensor) P0125 (Insufficient ECT for closed loop) P0335 (CKP sensor) P0340, P0341 (CMP sensor) |
| Throttle position | 0.2 to 2 V |
| Battery voltage | 10.5 V or more |
| Engine coolant temperature | 70°C (158°F) or more |
| IAT sensor circuit | OK |
| ECT sensor circuit | OK |
| CKP sensor circuit | OK |
| TP sensor circuit | OK |
| EVAP leak detection pump | OK |
| EVAP vent valve | OK |
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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