B0174 - DTC B0174 - Fuel Level Sensor Circuit Low Input - Common in 2010-2015 Ford Focus & 2011-2014 Chevrolet Malibu

Quick Answer

B0174 means: B0174 indicates a low input signal from the fuel level sensor circuit.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with B0174? Address promptly to avoid fuel-related issues.

Common Questions

What does B0174 mean and how does it affect my car?

B0174 indicates a low input from your fuel level sensor, which can lead to inaccurate fuel readings. This may cause your vehicle to stall unexpectedly or result in poor fuel efficiency. It's important to address this code to ensure your vehicle operates smoothly.

What are the most common causes of B0174 and how much does it cost to fix?

The most common cause of B0174 is a faulty fuel level sensor, which can cost between $150 and $300 to replace. Other causes include damaged wiring and ECM issues, which may vary in cost depending on the specific repairs needed.

Can I drive my car with B0174 or should I stop immediately?

While you can technically drive with B0174, it’s not advisable as it may lead to stalling or running out of fuel unexpectedly. It's best to have the issue diagnosed and repaired as soon as possible to avoid potential safety risks.

How can I diagnose B0174 myself using GeekOBD APP?

Using the GeekOBD APP, you can perform an OBD2 scan to retrieve the B0174 code. From there, check the freeze frame data for any additional context on when the code was triggered. This can help you narrow down the root cause.

What vehicles are most commonly affected by B0174?

The B0174 code is commonly seen in vehicles like the 2010-2015 Ford Focus and 2011-2014 Chevrolet Malibu. Always check for any manufacturer recalls or technical service bulletins (TSBs) that may be related to this issue.

How can I prevent B0174 from happening again?

Regular maintenance can help prevent B0174 from recurring. This includes keeping your fuel system clean, checking wiring connections routinely, and replacing the fuel level sensor as needed based on your vehicle's service intervals.

What is B0174?

The diagnostic trouble code (DTC) B0174 indicates an issue with the fuel level sensor circuit, specifically noting a low input signal. This code is typically triggered when the Engine Control Module (ECM) detects that the fuel level sensor, which monitors the amount of fuel in the tank, is sending a signal that is lower than expected. This could mean that the fuel level is inaccurately reported, potentially leading to unexpected engine performance issues or even stalling. For many car owners, this can result in the 'Check Engine' light illuminating on the dashboard, which can be a source of confusion and concern. If left unaddressed, the inaccurate fuel readings can lead to running out of fuel unexpectedly or affecting fuel efficiency. Additionally, the B0174 code is often accompanied by other related codes, suggesting that there may be a larger issue at play, such as a failing fuel pump or a problem with the fuel system wiring. Immediate attention is advisable, especially if the vehicle shows signs of poor performance or if the fuel gauge is not functioning correctly.

System: B - Body (Airbags, Lighting, Security, Climate Control)

Symptoms

Common symptoms when B0174 is present:

The 'Check Engine' light illuminates and stays on, indicating a fuel sensor issue.
Inconsistent fuel gauge readings, leading to confusion on fuel availability.
Engine may hesitate or stall unexpectedly due to inaccurate fuel level readings.
Fuel economy may decrease by 10-20% as the engine compensates for the faulty reading.
Vehicle may have difficulty starting if fuel levels are misreported.

Possible Causes

Most common causes of B0174 (ordered by frequency):

{'cause': 'Faulty fuel level sensor - 60% likelihood. This is the most common reason for the B0174 code, often due to wear and tear over time or exposure to fuel contaminants.', 'details': 'The fuel level sensor can degrade, leading to erroneous readings.'}
{'cause': 'Damaged wiring or connectors - 25% likelihood. Wiring issues can occur due to corrosion or physical damage, interrupting the sensor signal.', 'details': 'Inspect wiring for frays, corrosion, or loose connections that could affect performance.'}
{'cause': 'ECM issues - 10% likelihood. Problems within the Engine Control Module can lead to misinterpretation of sensor signals.', 'details': 'A professional diagnosis may be required to rule out ECM malfunction.'}
{'cause': 'Fuel pump problems - 5% likelihood. A failing fuel pump can impact fuel delivery and affect the sensor readings.', 'details': 'Listen for unusual noises from the fuel pump when the vehicle is running.'}
{'cause': "Contaminated fuel - Rare but possible. Contaminants in the fuel can affect the sensor's ability to function correctly.", 'details': 'Consider using a fuel cleaner or consulting a mechanic if this is suspected.'}

B0174 Repair Costs

Cost Breakdown by Repair Type

Fuel Level Sensor Replacement

Replacing the faulty fuel level sensor is often the most effective solution.

Total: $150 - $300
Success rate: 90%

Wiring Repair or Replacement

Repairing damaged wiring or connectors related to the sensor.

Total: $50 - $150
Success rate: 80%

Money-Saving Tips for B0174

Start with the most common and least expensive repairs first
Use GeekOBD APP to confirm diagnosis before replacing expensive parts
Consider preventive maintenance to avoid future occurrences
Compare prices for OEM vs aftermarket parts based on your needs
Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional B0174 Diagnosis Process

Follow these systematic steps to accurately diagnose B0174. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).