Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means that the car's computer is getting a signal that the fuel temperature is too high from a specific sensor.
The P0188 code is triggered when the Powertrain Control Module (PCM) detects an unusually high voltage signal from the fuel temperature sensor B circuit.
The fuel temperature sensor measures the temperature of the fuel in the fuel system. The PCM uses this information to adjust fuel delivery and timing for optimal performance and emissions. A 'high' circuit condition indicates that the sensor is sending a higher voltage signal than expected, which could mean the sensor is malfunctioning, there's a wiring issue, or the fuel is actually too hot.
• Check Engine Light is on
• Poor fuel economy
• Engine performance issues
• Increased emissions
• Faulty fuel temperature sensor
• Wiring issues such as shorts or open circuits
• Poor electrical connections
• PCM malfunction
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the P0188 code.
• Inspect the fuel temperature sensor and its wiring for damage.
• Check the electrical connections for corrosion or looseness.
• Test the sensor's voltage and resistance.
• Replace the faulty fuel temperature sensor.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain the fuel system.
• Ensure proper electrical connections.
• Use quality fuel to avoid contamination.
Sensor Issue
• Avoid driving with the Check Engine Light on for extended periods.
• Consult a professional mechanic if unsure about the repair.
Check with the vehicle manufacturer for specific warranty coverage on sensors.
This code has been reported in vehicles with aging fuel systems or those exposed to extreme temperatures.
Moderate – Should be addressed soon to avoid potential engine performance issues.
Driving with a malfunctioning fuel temperature sensor could lead to increased emissions, which may violate emissions regulations.
• Engine at operating temperature
• Vehicle stationary
The fuel temperature sensor is typically located near the fuel rail or fuel tank.
Q: Can I drive with a P0188 code?
A: It's possible, but not recommended as it may lead to poor engine performance and increased emissions.
Q: How do I reset the Check Engine Light after fixing the issue?
A: Use an OBD-II scanner to clear the code, or disconnect the battery for a few minutes.
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