P0094 OBD-II Trouble Code: Fuel System Leak - Small Leak Detected

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0094 code

P0094 is a diagnostic trouble code (DTC) for "Fuel System Leak - Small Leak Detected". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0094 DIAGNOSTIC Get a fair and transparent estimate upfront

P0094 code definition

Fuel System Leak - Small Leak Detected

What the P0094 code means

The P0094 code is set in a vehicle’s Powertrain Control Module (PCM) when it detects a small leak in the fuel system. It is most common on vehicles with diesel engines.

What are the causes of the P0094 code?

  • Small leak in the injection pump
  • Small leak in the injectors
  • Small leak in the fuel lines and hoses
  • Small leak in the fuel rail
  • Small leak in the fuel filter
  • Small leak in the fuel tank
  • Fuel pressure decreased by the fuel pump, injector pump, a restriction in the fuel system, or a fuel pressure regulator

What are the symptoms of the P0094 code?

  • Running out of fuel faster than normal
  • Decreased fuel economy
  • Check Engine Light illumination
  • Fuel odors
  • Risk of fire

How does a mechanic diagnose the P0094 code?

  • Inspects the fuel system for leaks

  • Repairs any leaks found

If no leaks are found in the fuel system:

  • Conducts a fuel pressure test

If fuel pressure is lower than manufacturer-specified pressure:

  • Inspects the fuel pump
  • Inspects the injector pump
  • Inspects the fuel pressure regulator

Common mistakes when diagnosing the P0094 code

Checking for leaks and, after not finding any leaks, replacing the fuel pressure regulator. This part is a common cause of this issue, however is is always best to know for sure that a part is faulty by testing it before replacing anything.

How serious is the P0094 code?

The P0094 code is not as serious as a P0093 code, due to the fact that the leak is smaller. However, considering that a fuel leak is still possible, the risk of a fire is also possible, which can become a very serious safety issue and could cause injury to the driver and passengers.

What repairs can fix the P0094 code?

Additional comments regarding the P0094 code

Just because this code says that a “small leak” has been detected in the fuel system does not mean that a leak actually exists. This code is set when the PCM sees a noticeable loss in fuel pressure. If the fuel pressure sensor or its circuitry are damaged, or the fuel pressure regulator, fuel pump, or fuel filter are faulty, this can cause a decrease in fuel pressure and therefore cause a P0094 code.

Need help with a P0094 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 to have this issue resolved.

P0094
trouble codes
Check Engine Light

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0094 code.

SCHEDULE P0094 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,841

Rating Summary
5,401
216
50
34
140
5,401
216
50
34
140

Tabitha

16 years of experience
228 reviews
Tabitha
16 years of experience
Chevrolet Suburban 1500 - Check Engine Light is on - La Jolla, California
She is now mine, my son's, my roommates and any friends I have, mechanic for life....no seriously she was perfect in every way, efficient, honest, tough love and know's her stuff. She rock's!

Edmar

21 years of experience
196 reviews
Edmar
21 years of experience
BMW 330Ci - Check Engine Light is on Inspection - Little Elm, Texas
Edmar was friendly and knowledgeable. He took the time to explain upcoming maintenance items and which ones could be done together to save on labor costs and time.

Edmar

21 years of experience
196 reviews
Edmar
21 years of experience
Cadillac CTS - Check Engine Light is on - McKinney, Texas
Edmar is always professional and he knows his craft. He never dissapoints. He is my go to Mechanic.

Anthony

27 years of experience
74 reviews
Anthony
27 years of experience
Jeep Grand Cherokee - Check Engine Light is on - Riverhead, New York
Anthony was very informative and punctual throughout the entire process. He definitely knows what he is talking about, a true subject matter expert... Will absolutely recommend him to family and friends..... A true asset and gentleman to find for my Jeep repairs. Hope "Your Mechanic" knows how well he represents them....


More related articles

P2638 OBD-II Trouble Code: Torque Management Feedback Signal 'A' Range/Performance
P2638 P2638 code definition If the Powertrain Control Module (PCM) stores a P2638 trouble code, it indicates that a signal malfunction has been detected in the PCM or one of the other support modules, dealing specifically with the torque management...
P3466 OBD-II Trouble Code: Cylinder 9 Deactivation/Intake Valve Malfunction
P3466 P3466 code definition P3466 is code for Cyl9 Deactivation/Intake Valve Ctrl Perf. Cyl9 narrows the issue down to engine cylinder number 9, while “Perf” indicates a performance problem. Other P3400 series codes may also be present, alerting you to...
P0589 OBD-II Trouble Code: Cruise Control Multi-Function Input “B” Circuit**
P0589 means the ECM found a fault in the cruise control multi-function input B circuit, caused by faults within the cruise control electrical system.

Related questions

Getting error code P0128

This code is a sign that the engine did not get to operating temperature in a specified amount of time and the computer turns on the Check Engine Light. The most common problem is that the engine thermostat is partly...

Engine light is on and sometimes the power in the engine reduces

I believe that the speedometer needle going up as the car is started is a factory feature that was added by Chevrolet on purpose. As for the acceleration issue, I would recommend having the vehicle scanned for trouble codes with...

Unable to go past 70-80 Km when going up a hill. Code P0174 with flashing engine light

Hello. A flashing Check Engine Light is an indicator that the computer has detected an issue that may potentially cause harm to the vehicle's emission system components. The code P0174 indicates a lean condition on bank 2 of the engine....

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com