Code 55: Revision history

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22 July 2026

6 July 2026

  • curprev 19:0519:05, 6 July 2026 Cliff talk contribs 3,513 bytes +3,513 Created page with "'''Code 55''' is a diagnostic trouble code related to the ECM on the Pontiac Fiero. Code 55 indicates that the ECM has detected an internal error or serious ECM-related fault. == Overview == The ECM controls the engine management system. It receives sensor inputs, processes engine operating conditions, and controls fuel delivery, ignition timing, idle control, emissions functions, and diagnostic functions. Code 55 is set when the..."
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