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 for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 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 $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
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.

Check Engine Light
P0094
trouble codes

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

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P0372 OBD-II Trouble Code: Timing Reference High Resolution Signal A Too Few Pulses
P0372 code means less pulses than normal have been detected on the sensor disk on the injection pump due to faulty crankshaft or crankshaft sensor.
P0391 OBD-II Trouble Code: Camshaft Position Sensor "B" Circuit Range/Performance (Bank 2)
P0391 code means indicates that the problem is on the side of the engine which does not contain cylinder #1 due to bad sensors, or connectors.
P0489 OBD-II Trouble Code: Exhaust Gas Recirculation “A” Control Circuit Low
P0489 means that the exhaust gas recirculation (EGR) “A” control circuit is reporting a low voltage flow due to faulty wiring or clogged EGR passages.

Related questions

the check engine light appears and it gives us the code P0170
The P0170 trouble code (https://www.yourmechanic.com/article/p0170-obd-ii-trouble-code-fuel-trim-malfunction-bank-1-by-andrew-quinn) does not necessarily go with your vehicle, but it indicates fuel control problems. I recommend the following: Have the fuel pressure tested to see if it is too low or high. Make sure that the...
Air bag deploying
There have been many cases of defective airbags or systems causing a fault code to be stored in the system computer. If there is a fault code stored, the air bag will not deploy because the system has been shut...
Distributor
The distributor on the 1996 Accord has an integrated Cylinder Position (CYP) Sensor, Crankshaft Position Sensor (CKP) and Top Dead Center (TDC) Sensor. If you have replaced the distributor due to diagnostic trouble code P1382 setting, which involves faults with...

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