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Home >> Toyota >> 1990 >> Tercel Base, 2D Hatchback, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (Tests W/Codes) >> Code 21 - O2 Sensor Signal (4A-F) >> Probable Causes
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Probable Causes

WARNING: This page is about a different car, the 1989 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Diagnostic chart not available from manufacturer.
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