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P0093 OBD-II Trouble Code: Fuel System Leak Detected Large Leak

Check Engine Light

P0093 code definition

Fuel System Leak Detected Large Leak

What the P0093 Code Means

A code exists for a large leak, small leak, and very small leak. There is a range of fuel leakage programmed into the Powertrain Control Module (PCM) by the manufacturer to determine which code will be stored based on the amount of leakage.

What are the causes of the P0093 code?

All of these issues could trigger a large fuel leak code:

  • Leaks from the fuel tank due to vehicle damage
  • Leaks from the fuel lines due to rust
  • Leaks from the fuel filter due to rust or improper installation
  • Leaks from the injectors due to faulty seals
  • Leaks from any fuel system related hoses due to cracks in the rubber

What are the symptoms of the P0093 code?

  • Running out of fuel at a very fast rate

  • Extremely poor fuel economy

  • The risk of a fire

  • Fuel pressure decrease (could cause the engine to run poorly, further decreasing fuel economy)

How does a mechanic diagnose the P0093 code?

  • The mechanic will start by visually inspecting the fuel system, searching primarily for the leak. Since the leak is considered a large leak, it should be fairly easy to locate.

  • Once the source of the fuel leak has been found, the mechanic will repair or replace the part that is causing the large fuel leak.

Common mistakes when diagnosing the P0093 code.

Considering that the issue at hand is a large fuel leak, it would be quite difficult to make a mistake during diagnosis. This issue is as simple as locating the fuel leak and having it repaired.

How serious is the P0093 code?

The P0093 code is very serious. Having this code stored in your Powertrain Control Module can be a safety issue. With this code in the system, it is a safety hazard because a fire can be caused by this. It is very important to have the fuel leak located and repaired as soon as possible.

What repairs can fix the P0093 code?

Any part of the fuel system can cause this code. Some of the parts that could be replaced to repair this issue would include:

Additional comments regarding the P0093 code.

It is not advisable to drive the vehicle very much with a P0093 code stored in the PCM. A large fuel leak is one of the most major safety concerns that a vehicle could possibly have. Someone driving by who tosses a cigarette out the window could be oblivious to your large fuel leak and cause personal injury or death.

Need help with a P0093 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
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