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 getting a steady reading from the sensor that measures how hot the fuel is. It's like when you're trying to watch a video online, and it keeps stopping and starting.
The P0189 code is triggered when the Engine Control Module (ECM) detects an intermittent signal from the fuel temperature sensor B circuit.
The fuel temperature sensor B is responsible for measuring the temperature of the fuel in the vehicle. This sensor sends a signal to the ECM, which uses this data to adjust fuel delivery and optimize engine performance. An intermittent signal indicates that the sensor is not providing a consistent reading, which can affect engine efficiency and emissions.
• Check Engine Light illuminated
• Poor fuel economy
• Engine performance issues
• Faulty fuel temperature sensor B
• Wiring issues such as loose connections or damaged wires
• Faulty ECM
ECM: Engine Control Module, the computer that controls engine functions.
OBD-II: On-Board Diagnostics, a standardized system for vehicle self-diagnosis and reporting.
• Use an OBD-II scanner to verify the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the fuel temperature sensor B for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the fuel temperature sensor B if faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain fuel system components.
• Ensure proper electrical connections.
• Use quality fuel to prevent contamination.
Sensor Issue
• Avoid driving aggressively to minimize fuel system stress.
• Schedule regular maintenance checks.
• Monitor fuel economy for any sudden changes.
Check with your vehicle manufacturer for specific warranty coverage on emissions-related components.
This code has been more common in vehicles with higher mileage or those that frequently operate in extreme temperatures.
Moderate – While not immediately critical, addressing this issue promptly can prevent further engine performance problems.
Driving with a malfunctioning sensor can lead to increased emissions, which may not comply with local environmental regulations.
• Engine at operating temperature
• Vehicle stationary
The fuel temperature sensor B is typically located near the fuel rail or fuel tank.
Q: Can I drive my car with a P0189 code?
A: Yes, but it's best to get it checked soon to avoid potential engine performance issues.
Q: How can I reset the Check Engine Light after fixing the issue?
A: You can use an OBD-II scanner to clear the code, or the light may turn off after several drive cycles if the issue is resolved.
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