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Home >> Toyota >> 1997 >> Supra 3.0 E, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Control System Tests W/Codes - Non-Turbo) >> Circuit Tests >> DTC P0420: Catalyst System Efficiency Below Threshold >> Notes

DTC P0420: Catalyst System Efficiency Below Threshold: Notes

WARNING: This page is about a different variant/trim than selected.
NOTE: Sensor No. 1 refers to sensor located in front exhaust manifold. Sensor No. 2 refers to sensor located in rear exhaust manifold. Sensor No. 3 refers to sensor located behind front catalytic converter.
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