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.
2006 Scion xA AutomaticFACTORY OEM SERVICE PROCEDURE
Monitor Strategy
MONITOR STRATEGY
| Related DTCs | P0420: Catalyst deterioration |
| Required Sensors/Components (Main) | TWC |
| Required Sensors/Components (Related) | HO2 sensor, Intake Air Temperature (IAT) sensor, Mass Air Flow (MAF) meter, Crankshaft Position (CKP) sensor, Engine Coolant Temperature (ECT) sensor |
| Frequency of Operation | Once per driving cycle |
| Duration | 60 seconds |
| MIL Operation | 2 driving cycles |
| Sequence of Operation | None |
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.