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.
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HOMESERVICE MANUALSTOYOTA2001HIGHLANDER 2WD L4-2.4L (2AZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTPROM - PROGRAMMABLE READ ONLY MEMORYTECHNICAL SERVICE BULLETINS
2001 Toyota Highlander 2WD L4-2.4L (2AZ-FE)
PROM - Programmable Read Only Memory: Technical Service Bulletins
2001 Toyota Highlander 2WD L4-2.4L (2AZ-FE)SECTION Technical Service Bulletins
- Recalls
- Customer Interest
- All Technical Service Bulletins
- Computers/Controls - Techstream(R) Reprogramming Procedure
- Canada - Engine Controls - Techstream(R) ECU Re-Flash Procedure
- Canada - Engine Controls - MIL ON/DTC's P0420/P0430 Set
- Canada - Engine Controls - ECU Reprogramming Procedure
- Canada - Engine Controls - Error When Reprogramming ECU
- Canada - Engine Controls - ECU Flash Reprogramming Process
- Campaign - ECM Update For MIL ON/DTC P0420/P0430
- Engine Controls - MIL ON/DTC's P0420/P0430 Stored
- Engine Controls - Error When Reprogramming ECU
- Engine Controls - ECU Reprogramming Procedure
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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.