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 MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSRECALLSCAMPAIGN - ECM UPDATE FOR MIL ON/DTC P0420/P0430III. PREPARATION
2001 Toyota Highlander 2WD L4-2.4L (2AZ-FE)
III. Preparation
2001 Toyota Highlander 2WD L4-2.4L (2AZ-FE)SECTION III. Preparation
A. PARTS
^ Parts replacement will not be necessary to complete the campaign.
B. TOOLS
^ Toyota Diagnostic Tester or Techstream
^ Midtronics Battery Tester
^ Battery Charger
C. MATERIALS
^ TSB: SS002-01S002-01
^ Parts replacement will not be necessary to complete the campaign.
B. TOOLS
^ Toyota Diagnostic Tester or Techstream
^ Midtronics Battery Tester
^ Battery Charger
C. MATERIALS
^ TSB: SS002-01S002-01
RENDER: 1.0x
NO RELATED
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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.