Lincoln Error Code P0174: How to Fix It

Q: What causes Lincoln P0174 error code?

P0174 is typically caused by vacuum leaks, faulty mass airflow sensor, clogged fuel injectors, weak fuel pump, dirty oxygen sensors, or intake manifold gasket leaks. It can also result from using the wrong grade of fuel or a dirty air filter.

Q: Can I drive my Lincoln with P0174 code?

You can drive short distances with P0174, but it should be fixed promptly. The lean condition can cause poor fuel economy, rough idle, hesitation during acceleration, and potential engine damage if left untreated for extended periods.

Q: How much does it cost to fix P0174 in a Lincoln?

Repair costs vary depending on the root cause. Simple fixes like cleaning the MAF sensor or replacing vacuum hoses cost $20-100. More expensive repairs include fuel injector replacement ($300-600), fuel pump replacement ($400-800), or oxygen sensor replacement ($200-400).

Q: What's the difference between P0171 and P0174?

P0171 indicates a lean condition on Bank 1 (cylinder 1 side), while P0174 indicates a lean condition on Bank 2 (opposite side). If both codes appear together, the problem is likely affecting the entire fuel system rather than being isolated to one bank.

Q: Will P0174 cause my Lincoln to fail emissions testing?

Yes, P0174 will typically cause your Lincoln to fail emissions testing. The lean air-fuel mixture affects exhaust emissions and must be repaired before the vehicle can pass inspection in most states.

Abstract

Lincoln error code P0174 indicates that your vehicle's engine control module has detected a lean air-fuel mixture on Bank 2 (the side of the engine opposite from cylinder #1). This means there's either too much air entering the engine or not enough fuel being delivered to Bank 2 cylinders.