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 thinks the fuel temperature sensor is reading a temperature that's too low. It's like when a thermometer says it's freezing outside, but you know it's not that cold.
The P0187 code is triggered when the Powertrain Control Module (PCM) detects a low voltage signal from the fuel temperature sensor B circuit.
The fuel temperature sensor measures the temperature of the fuel and sends this information to the PCM. A low circuit signal indicates that the sensor is reading a temperature lower than the expected range, which could be due to a sensor fault, wiring issue, or a problem with the PCM.
• Check Engine Light illuminated
• Poor fuel economy
• Engine performance issues
• Faulty fuel temperature sensor B
• Wiring issues such as shorts or open circuits
• Faulty PCM
PCM: Powertrain Control Module, the vehicle's onboard computer that manages engine and transmission functions.
OBD-II: On-Board Diagnostics II, a standardized system for self-diagnosing vehicle issues.
• Use an OBD-II scanner to confirm the code.
• Inspect the fuel temperature sensor B and its wiring for damage.
• Test the sensor's resistance and compare it to specifications.
• Replace the fuel temperature sensor B if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain fuel system components.
• Ensure proper electrical connections.
• Use high-quality fuel to prevent sensor contamination.
Sensor Issue
• Have a professional diagnose the issue if unsure.
• Avoid driving with this code active for extended periods.
• Regular maintenance can prevent sensor issues.
Check with your vehicle manufacturer for warranty coverage on emission-related components.
Fuel temperature sensor issues have been known to affect fuel efficiency and engine performance, prompting manufacturers to improve sensor designs over time.
Moderate – Address the issue soon to prevent potential engine performance problems.
Driving with a malfunctioning fuel temperature sensor can lead to increased emissions, which may not comply with environmental regulations.
• Engine at operating temperature
• Stable idle conditions
The fuel temperature sensor is typically located near the fuel rail or in the fuel tank.
Q: Can I drive my car with a P0187 code?
A: It's possible to drive short distances, but it's best to address the issue promptly to avoid potential engine performance problems.
Q: How do I reset the P0187 code?
A: After fixing the issue, use an OBD-II scanner to clear the code from the PCM.
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