Search OBD-II codes
Filter by family, system, severity, engine, fuel or manufacturer. Every row links to the full diagnostic page with causes, safety advice, checks and a guided workflow.
5 codes found with 1 filter applied
Showing 1–5 of 5
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System too lean — Bank 1
The engine runs with too much air or too little fuel on bank 1. Fuel trims add fuel to compensate.
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System too rich — Bank 1
The engine runs with too much fuel or too little air on bank 1.
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System too lean — Bank 2
Bank 2 is running lean — fuel trims are adding fuel.
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Oxygen sensor — bank 1, lean signal during closed loop
The engine is running lean in closed loop. Find the air or fuel issue first.