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 TouringFACTORY OEM SERVICE PROCEDURE
Fail-Safe Chart
If any of the following codes are recorded, the ECM enters fail-safe mode.
FAIL-SAFE CHART
| DTC No. | Fail-safe Operation | Fail-safe Deactivation Conditions |
|---|---|---|
| P0031 P0032 P0037 P0038 |
Heater is turned OFF | Power switch OFF |
| P0100 P0102 P0103 |
Ignition timing is calculated from engine speed and throttle angle | "Pass" condition detected |
| P0110 P0112 P0113 |
Intake air temperature is fixed at 20°C (68°F) | "Pass" condition detected |
| P0115 P0117 P0118 |
Engine coolant temperature is fixed at 80°C (176°F) | "Pass" condition detected |
| P0120 P0122 P0123 |
Fuel cut intermittently and drive on motor mode | Power switch OFF |
| P0121 | Fuel cut intermittently and drive on motor mode | Power switch OFF |
| P0325 | Maximum ignition timing retardation | Power switch OFF |
| P0351 P0352 P0353 P0354 |
Fuel cut and drive on motor mode | Power switch OFF |
| P0657 | VTA is fixed at about 16% and fuel cut intermittently and drive on motor mode | Power switch OFF |
| P1115 P1117 P1118 |
Engine coolant temperature is fixed at 80°C (176°F) | "Pass" condition detected |
| P1120 P1122 P1123 |
Water valve position is fixed at position when DTC is detected | "Pass" condition detected |
| P2102 P2103 |
VTA is fixed at about 16% and fuel cut intermittently | Power switch OFF |
| P2119 | VTA is fixed at about 16% and fuel cut intermittently | "Pass" condition detected and power switch OFF |
| P3190 P3191 P3193 |
Drive on motor mode | Power switch OFF |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.