Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the car's system that tells you how much fuel is in the tank. It's like when your toy's battery meter doesn't show how much battery is left.
The P0656 code is triggered when the Powertrain Control Module (PCM) detects a malfunction in the fuel level output circuit.
The fuel level output circuit is responsible for sending the fuel level information from the fuel tank to the vehicle's dashboard gauge. A malfunction in this circuit could mean a problem with the wiring, the fuel level sensor, or the gauge itself.
• Fuel gauge not working or showing incorrect fuel level
• Check Engine Light illuminated
• Inaccurate fuel readings
• Faulty fuel level sensor
• Damaged wiring or connectors in the fuel level circuit
• Faulty instrument cluster
PCM: Powertrain Control Module
Fuel Level Sensor: A device that measures the amount of fuel in the tank
• Check for any additional codes that may be present.
• Inspect the wiring and connectors for damage or corrosion.
• Test the fuel level sensor for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the fuel level sensor if found faulty.
• Repair or replace the instrument cluster if necessary.
• OBD-II scanner
• Multimeter
• Wiring diagram for the vehicle
$100 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect fuel system wiring for damage.
• Ensure proper maintenance of the fuel tank and sending unit.
• Avoid overfilling the fuel tank.
Sensor Issue
• Do not rely on the fuel gauge until the issue is resolved.
• Monitor fuel usage manually to avoid running out of fuel.
Check with the vehicle manufacturer for specific warranty coverage on fuel system components.
This code has been associated with aging vehicles where wiring and connectors may become corroded or damaged over time.
Moderate – It won't immediately affect drivability, but it can lead to running out of fuel unexpectedly.
Ignoring this code can lead to running out of fuel, which may be dangerous in certain driving conditions.
• Vehicle must be turned on.
• Fuel tank should have a measurable amount of fuel.
The fuel level sensor is typically located inside the fuel tank, and the output circuit connects to the vehicle's dashboard.
Q: Can I drive with a P0656 code?
A: Yes, but be cautious as the fuel gauge may not show the correct fuel level.
Q: Will a P0656 code cause my car to fail emissions tests?
A: No, this code is not related to emissions control systems.
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