Infiniti P0174 Error Code: How to Fix It

Q: Can I drive my Infiniti with P0174 code?

While you can drive short distances, it's not recommended for extended periods. The lean condition can cause engine damage over time, reduce fuel economy, and may cause the engine to run rough or stall.

Q: How much does it cost to fix P0174 on an Infiniti?

Costs vary widely depending on the root cause. Simple fixes like cleaning the MAF sensor or replacing air filter cost $20-50. More complex repairs like oxygen sensor replacement ($200-400) or fuel injector cleaning/replacement ($300-800) cost significantly more.

Q: What causes P0174 code in Infiniti vehicles?

Common causes include vacuum leaks, dirty or faulty MAF sensor, clogged air filter, failing oxygen sensors, fuel delivery problems (pump, filter, injectors), and exhaust leaks before the oxygen sensors.

Q: Will P0174 clear itself?

No, P0174 will not clear itself. The underlying problem must be fixed, and then the code needs to be cleared using an OBD2 scanner. The code may return if the problem isn't properly resolved.

Q: Is P0174 the same as P0171?

Both indicate lean conditions, but P0171 affects Bank 1 while P0174 affects Bank 2. If both codes appear together, look for issues affecting the entire engine like a large vacuum leak or fuel pump problems.

Abstract

The P0174 error code in your Infiniti indicates that the engine's air-fuel mixture is too lean on Bank 2 (the side opposite cylinder #1). This means there's too much air and not enough fuel reaching the engine, which can cause poor performance, reduced fuel economy, and potential engine damage if left unfixed.