P0174: System Too Lean (Bank 2)
What this check-engine code means in plain English, what usually causes it, and what a fix typically costs.
What P0174 means
The engine control module has detected that the air-fuel mixture on Bank 2 (the side of the engine opposite cylinder #1) is too lean, meaning there's too much air or not enough fuel. The computer tries to compensate by adding more fuel, but the mixture remains outside normal parameters.
What causes P0174?
Is P0174 safe to drive?
You can typically drive short distances with this code, but prolonged lean conditions can damage the catalytic converter and reduce engine performance. Address it within a few days to avoid more expensive repairs.
P0174 repair cost
Industry-average estimates. Cost depends on the root cause—a vacuum hose may cost under $100, while fuel pump replacement or intake gasket work can exceed $600.
Which one is it for your car?
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