• Check Engine Light illuminated
• Poor fuel economy
• Engine performance issues
• Faulty alternative fuel sensor
• Damaged or corroded wiring or connectors
• PCM malfunction
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• P1289
• P1290
Alternative Fuel Sensor Circuit Low
The car's computer is having trouble reading the sensor that checks the fuel type. It's like the sensor is whispering instead of talking loudly, so the computer can't understand it.
This code indicates that the signal from the alternative fuel sensor is lower than expected, which could mean a problem with the sensor or its circuit.
The P1288 code is triggered when the Powertrain Control Module (PCM) detects a voltage signal from the alternative fuel sensor that is below the specified range. This could be due to a faulty sensor, wiring issues, or a problem with the PCM itself.
• Inspect the alternative fuel sensor and its wiring for damage.
• Check for corrosion or loose connections in the sensor circuit.
• Test the sensor's output voltage with a multimeter.
• Replace the alternative fuel sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Prius
• Regularly inspect and maintain sensor connections.
• Keep the fuel system clean to prevent sensor contamination.
• Use quality fuel to avoid sensor damage.
Sensor Issue
• If the Check Engine Light is on, have the vehicle inspected soon.
• Avoid driving with performance issues to prevent further damage.
Check with your vehicle manufacturer for warranty coverage on emissions-related components.
This code has been more common in vehicles using alternative fuels, as the sensors can be more sensitive to fuel quality variations.
Moderate – It's advisable to address this issue soon to ensure optimal vehicle performance and fuel efficiency.
Driving with a malfunctioning fuel sensor could lead to increased emissions and may not comply with local environmental regulations.
• Engine running
• Vehicle at operating temperature
The alternative fuel sensor is typically located near the fuel tank or fuel line.
Q: Can I drive with a P1288 code?
A: It's possible, but not recommended as it can affect fuel efficiency and engine performance.
Q: Will a P1288 code clear itself?
A: The code may clear if the issue is intermittent and resolves itself, but it's best to diagnose and fix the problem.
