How to resolve P0172 system too rich?

1 Answers
VonDelaney
07/29/25 5:32pm
For the fault code P0172 indicating the fuel system is too rich, the following solutions can be applied: 1. Check if the fuel pressure is normal. 2. Inspect the PCV valve, throttle body, carbon canister solenoid valve, intake manifold, brake booster, and hoses for any vacuum leaks. 3. Examine the coolant temperature sensor; check the mass air flow sensor; inspect the fuel injectors. 4. Additional information: The fuel system of a turbo-shaft engine consists of a fuel pump, fuel filter, fuel injectors, etc., to ensure the required fuel flow under various operating conditions and flight scenarios.
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