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Home >> Toyota >> 2004 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P1129: Electronic Throttle Control System (ETCS) Malfunction >> Diagnosis & Repair
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Diagnosis & Repair

WARNING: This page is about a different car, the 2002 Lexus GS 430. However, it is still accessible from the selected car via links, so may be relevant.

Retrieve trouble codes. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If other codes are displayed, diagnose and repair those codes first and retest. If only DTC P1129 is displayed, replace ECM. Clear and retrieve trouble codes. If DTC P1129 is displayed again, replace throttle body and retest.

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