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Home >> Toyota >> 2004 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 35 (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 300. 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 any other codes are displayed other than DTC P1129, diagnose and repair those codes first. If only DTC P1129 is displayed, replace ECM. Retrieve trouble codes. If DTC P1129 is displayed, replace throttle body and retest.

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