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Home >> Toyota >> 2004 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 18 (Engine Control System Self-Diagnostics) >> Diagnostic Tests >> DTC P1129: Electronic Throttle Control System Malfunction >> Diagnosis & Repair

Diagnosis & Repair

WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

Replace ECM. ECM is located behind glove box. See Figure. Using Toyota hand-held tester or scan tool, clear DTCs from ECM. Recheck for DTCs. If DTC P1129 still exists, replace throttle body. See THROTTLE BODY under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article.