Land Rover P0174: Causes and Fixes

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If you own a Land Rover and have experienced the P0174 code. The P0174 code is related to the engine’s fuel system and indicates that the engine is running lean.

This blog post will provide you with information on the causes and fixes for the P0174 code.

P0174 Causes:

The P0174 code is often caused by a vacuum leak in the engine’s intake system. The intake system is responsible for delivering air to the engine, and a leak can cause unmetered air to enter the engine, resulting in a lean condition. Common areas for vacuum leaks include the intake manifold gasket, vacuum hoses, and the throttle body gasket.

Another common cause of the P0174 code is a faulty oxygen sensor. The oxygen sensor is responsible for measuring the amount of oxygen in the exhaust and sending this information to the engine control module. A faulty oxygen sensor can cause the engine control module to inaccurately calculate the fuel-to-air ratio, resulting in a lean condition.

A clogged or dirty fuel injector can also cause the P0174 code. The fuel injector is responsible for delivering fuel to the engine, and if it becomes clogged or dirty, it can restrict the amount of fuel that reaches the engine. This can cause the engine to run lean and trigger the P0174 code.

P0174 Fixes:

Fixing the P0174 code will depend on the root cause of the problem. If the cause is a vacuum leak, the leak must be located and repaired. This may involve replacing gaskets or vacuum hoses. In some cases, the throttle body may need to be cleaned or replaced.

If the oxygen sensor is found to be faulty, it should be replaced. A faulty oxygen sensor can cause a variety of problems, including decreased fuel efficiency and engine damage.

If a clogged or dirty fuel injector is the cause of the P0174 code, it should be cleaned or replaced. Cleaning the fuel injectors can be done with a fuel injector cleaning kit, which can be purchased at an auto parts store.


The P0174 code can be a frustrating problem for Land Rover owners. However, by understanding the causes and fixes of the P0174 code, you can take steps to repair the problem and keep your engine running smoothly. If you are unable to diagnose or fix the problem yourself, it is recommended to take your Land Rover to a qualified mechanic for further assistance.

Read also: Land Rover P1590: Causes and Fixes

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