LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 1995 >> Pickup Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.4L >> Diagnostic Testing >> Code 21 - Oxygen Sensor Circuit >> Code Detection Test Drive
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Code Detection Test Drive

  1. Ensure ignition is off. Remove EFI (15-amp) fuse for at least 10 seconds. Reinstall fuse. Start engine and warm to normal operating temperature.
  2. Allow engine to idle for 3 minutes. Turn on A/C. Place vehicle in "D" (A/T) or 1st gear (M/T). Accelerate vehicle with engine speed at 1300-1700 RPM (constant) until vehicle speed of 40-50 MPH is achieved. If vehicle is equipped with manual transmission, DO NOT allow engine speed to fall below 1200 RPM while shifting through gears.
  3. Maintain vehicle speed for at least 1-2 minutes. Stop vehicle and turn ignition off for at least 3 seconds. Start vehicle and accelerate with engine speed at 1300-1700 RPM (constant) until vehicle speed of 40-50 MPH is achieved. If vehicle is equipped with manual transmission, DO NOT allow engine speed to fall below 1200 RPM while shifting through gears.
  4. Maintain vehicle speed for at least 1-2 minutes. If malfunction exists, MIL will illuminate after approximately one minute from start of 2nd acceleration.
scientia non olet · About LEMON Manuals