P0174 Trouble Code Help: Diagnostic & Repair

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Cost of diagnosing the P0174 code

P0174 is a diagnostic trouble code (DTC) for "Trouble Code Help Diagnostic & Repair". 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 $169.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 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 $169.99 $50.0
Toyota $169.99 $50.0
BMW $184.99 $50.0

*Estimates may vary by market

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What Does the P0174 Code Mean?

Code P0174 indicates that there is a lean condition detected by the Engine Control Module (ECM). A lean condition will be created if there is too much air, and not enough fuel, in the air fuel ratio (AFR). The ECM is designed with the capability of adjusting a lean condition back to normal, but only in small to mediocre amounts. If the air fuel ratio requires more compensation to return to normal than the ECU is capable of, code P0174 may be set.

How Serious is the P0174 Code?

Generally, a lean condition is not that serious, and safety while driving should not be affected. However, be aware that there is a possibility of the lean condition being caused by a leak in the intake system. Leaks in the air intake may allow particles to enter the engine, which may be damaging to the vehicle.

Potential Causes of the P0174 Code

Some potential causes of the P0174 code to be set include:

Repairs to Fix the P0174 Code

The following are some possible repairs for the P0174 code, depending on the source of the issue:

Potential P0174 Code Symptoms

Potential symptoms associated with the P0174 code are as follows:

How a P0174 Inspection Works with YourMechanic

  1. When you choose YourMechanic, a mobile mechanic in your area will come to your home or office to perform an inspection, saving you time and money.
  2. Here is how a mobile mechanic will inspect your P0174 code:
  3. Performs a fuel pressure test
  4. Checks the intake system and vacuum lines for leaks
  5. Inspects the valve cover for worn hoses or leaks
  6. Inspects the PCV valve
  7. Tests the mass air flow sensor with a scan tool or multimeter
  8. Tests the related oxygen sensor with a scan tool or multimeter

Most Common Mistakes When Diagnosing

The two most common mistakes when diagnosing code p0174 are:

  • Replacing a component without first deeming it bad through testing
  • Failing to check the intake system for tears or leaks

Inspection & Repair for Code P0174

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.

Check Engine Light
P0174
trouble codes

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0174 code.

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Recent Check Engine Light is on Inspection reviews

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Brandon

9 years of experience
133 reviews
Brandon
9 years of experience
Ford Escort L4-2.0L - Check Engine Light is on - Nashville, Tennessee
Brandon showed up ahead of schedule, was very personable and diagnosed my problems. He also scheduled my next appointments which will be with him.
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William

23 years of experience
33 reviews
William
23 years of experience
Lexus IS250 V6-2.5L - Check Engine Light is on - Mableton, Georgia
Arrived early which was great. William was courteous, and attentive to the issue. Even though it took several attempts I'm so happy he was determined to fix it and he did!
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Dan

40 years of experience
1080 reviews
Dan
40 years of experience
Plymouth Grand Voyager - Check Engine Light is on - Lawrenceville, Georgia
Mr. Dan Barber was quite patient, courteous and quite knowledgeable. From my observation, Mr. Barber appears to be quite professional.
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Christopher

9 years of experience
120 reviews
Christopher
9 years of experience
Ford Fiesta L4-1.6L - Check Engine Light is on - Smyrna, Georgia
Chris communicated with us each step of the way up until his arrival. He listened well, was knowledgeable, and was prepared. He took the time to diagnose the problem, explained the what, why and how and provided a solution. I would definitely recommend him and will use him again.


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