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• 19:02, 6 July 2026 Cliff talk contribs created page Code 44 (Created page with "'''Code 44''' is a diagnostic trouble code related to a lean exhaust indication on the Pontiac Fiero. Code 44 indicates that the ECM is seeing an oxygen sensor signal that suggests the engine is running lean. == Overview == The Oxygen sensor monitors oxygen content in the exhaust. The ECM uses this signal to adjust fuel mixture during closed-loop operation. Code 44 is set when the ECM detects a lean exhaust condition for longe...")