What Causes Excessive Carbon Monoxide in Cars?

1 Answers
TeaganMarie
07/30/25 10:23am
Excessive carbon monoxide in cars is caused by: 1. Carbon deposits and coking; 2. During vehicle inspection, if exhaust emissions exceed standards, first check the oxygen sensor's working condition with a computer. A faulty oxygen sensor may lead to excessive nitrogen oxides, excessive spark plug gap can cause excessive carbon monoxide, and excessive carbon deposits can result in high hydrocarbon levels; 3. Vehicle inspections should be conducted when the engine is warm, as many parameters may not meet standards when the engine is cold. Methods to address excessive carbon monoxide in cars include: 1. Replace the oxygen sensor; 2. Repair or replace the catalytic converter, remove carbon deposits from the intake and exhaust systems, clean the throttle body and fuel injectors, and replace them if necessary; 3. Check and adjust the spark plug gap or replace them; 4. Inspect vacuum tubes for leaks or blockages and address any issues; repair the cooling fan if the engine temperature is too high; 5. Use a diagnostic scanner to check if the intake pressure sensor is functioning properly.
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