Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble reading the fuel level. It's like when your video game controller can't tell how much battery is left.
The vehicle's engine control module (ECM) is receiving an incorrect or unexpected signal from the second fuel level sensor.
The P1408 code is triggered when the ECM detects a problem with the signal from the secondary fuel level sensor. This sensor helps the ECM determine the amount of fuel in the tank, and any irregularities in its signal can cause this code to be set.
• Inaccurate fuel gauge reading
• Check Engine Light illuminated
• Possible fuel efficiency issues
• Faulty fuel level sensor
• Wiring issues in the fuel sensor circuit
• Malfunctioning ECM
ECM: Engine Control Module, the computer that manages the engine's operations.
OBD-II: On-Board Diagnostics, a system that monitors the performance of your vehicle.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors of the fuel level sensor.
• Test the fuel level sensor for proper operation.
• Replace the faulty fuel level sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford Focus
• Chevrolet Malibu
• Toyota Camry
• Regularly check fuel system components.
• Keep the fuel tank clean to prevent sensor damage.
• Ensure proper electrical connections in the fuel system.
Sensor Issue
• Keep track of fuel levels manually until the issue is resolved.
• Avoid running the vehicle on low fuel to prevent further complications.
Check with your vehicle manufacturer as some powertrain warranties may cover sensor issues.
This code has been reported in various models, often linked to sensor degradation over time.
Moderate – It should be addressed soon to avoid potential fuel management issues.
Driving with an inaccurate fuel gauge can lead to unexpected vehicle shutdowns, which may be dangerous.
• Vehicle at operating temperature
• Fuel tank at least half full
The fuel level sensor is typically located inside the fuel tank, attached to the fuel pump module.
Q: Can I drive with a P1408 code?
A: Yes, but it's not recommended as you might run out of fuel unexpectedly.
Q: Will fixing this code improve fuel efficiency?
A: It might help if the inaccurate readings were causing improper fuel management.
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