Engine-CodesSaturn – P0656 Saturn

P0656 Saturn Code - Fuel Level Output Circuit Malfunction

Quick Answer

The P0656 diagnostic trouble code for Saturn vehicles indicates a fuel level output circuit malfunction. Common causes include A faulty fuel level sensor, Damaged wiring or connectors in the fuel level circuit, Corrosion or contamination in the fuel level circuit. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0656 Saturn indicates Fuel Level Output Circuit Malfunction.
Common causes
Common causes include A faulty fuel level sensor, Damaged wiring or connectors in the fuel level circuit, Corrosion or contamination in the fuel level circuit.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P0656 Saturn Description

The P0656 diagnostic trouble code for Saturn vehicles indicates a fuel level output circuit malfunction. This means that there is an issue with the circuit responsible for sending the fuel level information to the engine control module (ECM) or powertrain control module (PCM). The fuel level sensor is a crucial component that helps the vehicle's computer determine how much fuel is in the tank. This information is vital for the vehicle's fuel management system to operate efficiently.

OBDII Code P0656 Saturn - Fuel Level Output Circuit Malfunction
P0656 Saturn Code - Fuel Level Output Circuit Malfunction

Common Causes of P0656 Saturn

  1. A faulty fuel level sensor.
  2. Damaged wiring or connectors in the fuel level circuit.
  3. Corrosion or contamination in the fuel level circuit.
  4. Malfunctioning ECM/PCM.
  5. Issues with the fuel pump or fuel system components.

Symptoms of P0656 Saturn

  1. Inaccurate fuel level readings on the fuel gauge.
  2. Check Engine Light illuminated on the dashboard.
  3. Poor fuel efficiency or fluctuating fuel economy.
  4. Engine stalling or rough idling.
  5. Difficulty starting the vehicle.

How to Fix P0656 Saturn

  1. Perform a comprehensive diagnosis to identify the specific cause of the fuel level output circuit malfunction.
  2. Inspect the fuel level sensor, wiring, and connectors for any visible damage or corrosion.
  3. Test the fuel level sensor and circuit using a multimeter to determine if they are functioning correctly.
  4. Replace the faulty fuel level sensor or repair any damaged wiring/connectors as needed.
  5. Clear the diagnostic trouble codes and perform a test drive to ensure the issue has been resolved.

Cost to Fix P0656 Saturn

The typical repair costs for a fuel level output circuit malfunction can vary depending on the specific cause of the issue and the extent of repairs needed. In general, replacing a faulty fuel level sensor can cost between $100 and $300, including parts and labor. However, if additional repairs are required, such as fixing damaged wiring or connectors, the total cost can increase. It is advisable to consult with a qualified mechanic or auto repair shop to obtain a more accurate estimate based on the vehicle's make and model, as well as the local labor rates. Keep in mind that rates can vary widely, so it's essential to research and compare prices before proceeding with the repair.

When is the Code Detected?

If the fault detection circuit senses a voltage other than what the PCM expects, the fault line status changes causing the P0656 code will set.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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