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What are some common check engine codes on Volvo vehicles?

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Quick Answer

Common check engine codes for Volvo vehicles include P0420, P0421 and P0430, which indicate a catalytic converter failure, and P0171 and P0174, which indicate a problem with the mass air flow sensors that measure the amount of air taken into the engine. Vacuum leaks may also cause these codes.

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What are some common check engine codes on Volvo vehicles?
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Some other common Volvo check engine codes are P0130, P0133, P0134, P0135 and P0136. These codes indicate a failure of the oxygen sensor, which monitors the ratio of air to fuel used by the engine. They may also indicate a short circuit in the sensor’s wiring. Codes P0400 and P0401 indicate a clog or a valve that is stuck in the Exhaust Gas Recirculation system. The accumulation of carbon deposits and exhaust debris is generally the cause behind these codes.

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