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.
Confirmation Driving Pattern
PURPOSE (see READINESS MONITOR DRIVE PATTERN )
HINT:
Performing this confirmation pattern will activate the catalyst monitoring by the ECM. This is very useful for verifying the completion of repairs.
- Clear the DTCs.
- Connect Techstream to the DLC3.
- Enter the following menus: Powertrain / Engine and ECT / Monitor. Check that Catalyst Efficiency is incomplete.
- Drive the vehicle according to the confirmation driving pattern. Note the state of the Readiness Tests. They will change to complete as the Catalyst Efficiency evaluation monitors operate.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Code / Pending. Check if any DTC (any pending code) is set.
If the READINESS CODE of Catalyst Efficiency was incomplete and any DTC (includes pending codes) was not set, extend the driving time.
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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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