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 has detected a problem with the sensor that measures alternative fuel levels. It's like when your video game controller stops working because the battery is low.
The P1289 code indicates that the voltage in the alternative fuel sensor circuit is higher than expected.
The alternative fuel sensor is responsible for measuring the level or quality of alternative fuel in the vehicle's system. A 'circuit high' condition means the sensor is sending a voltage signal that is higher than the normal operating range, which could indicate a wiring issue, a faulty sensor, or a problem with the vehicle's computer.
• Check Engine Light is on
• Poor fuel economy
• Vehicle may not run on alternative fuel properly
• Faulty alternative fuel sensor
• Wiring issues such as short circuits or open circuits
• Malfunctioning vehicle computer (ECU)
ECU: Engine Control Unit
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code
• Inspect wiring and connectors for damage
• Test the alternative fuel sensor for proper operation
• Replace the alternative fuel sensor if faulty
• Repair or replace damaged wiring or connectors
• Reprogram or replace the ECU if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Prius
• Regular maintenance checks of fuel system
• Ensure proper handling and storage of alternative fuels
• Inspect wiring and connectors regularly
Sensor Issue
• Avoid using alternative fuel until the issue is resolved
• Consult a professional mechanic for accurate diagnosis
Check with your vehicle manufacturer as some components may be covered under warranty.
This code has been more common in vehicles that have been retrofitted for alternative fuels.
Moderate – It should be addressed soon to avoid fuel efficiency issues.
Driving with a malfunctioning fuel sensor can lead to increased emissions and reduced fuel efficiency.
• Vehicle must be running on alternative fuel
• Sensor circuit must be active
The alternative fuel sensor is typically located near the fuel tank or along the fuel line.
Q: Can I drive my car with a P1289 code?
A: It's possible, but not recommended as it may affect fuel efficiency and emissions.
Q: How can I reset the P1289 code?
A: You can clear the code with an OBD-II scanner, but it may return if the underlying issue is not fixed.
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Specialty · Fuel pressure tester
Helpful for no-start, lean, rich, injector, and fuel-delivery diagnosis.
Useful for checking whether fuel delivery is contributing to the fault.
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Specialty · Compression tester
Useful when misfire, mechanical condition, or low-cylinder-pressure problems are suspected.
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