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 pressure in the fuel tank is too high compared to the air pressure outside. It's like when you blow up a balloon too much and it might pop.
The vehicle's onboard computer has detected that the pressure reading from the fuel tank pressure/temperature sensor is higher than expected when compared to the barometric pressure sensor.
The P11CD code is triggered when the Engine Control Module (ECM) detects that the fuel tank pressure sensor is reading a pressure that is significantly higher than the barometric pressure. This discrepancy can indicate a problem with the sensor itself, a blockage in the fuel tank venting system, or an issue with the ECM's interpretation of the sensor data.
• Check Engine Light illuminated
• Difficulty refueling
• Fuel odor
• Decreased fuel efficiency
• Faulty fuel tank pressure/temperature sensor
• Blocked or kinked fuel vapor lines
• Faulty barometric pressure sensor
• Wiring issues or poor electrical connections
• Faulty ECM
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the fuel tank pressure/temperature sensor and its wiring.
• Check for blockages in the fuel vapor lines.
• Compare readings from the fuel tank pressure sensor and barometric pressure sensor.
• Replace the faulty fuel tank pressure/temperature sensor.
• Repair or replace any damaged wiring or connectors.
• Clear any blockages in the fuel vapor lines.
• Update or reprogram the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regularly inspect and maintain fuel vapor lines.
• Ensure proper refueling practices to prevent overpressure.
• Perform routine checks on vehicle sensors.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you notice fuel odors.
• Avoid overfilling the fuel tank.
Repairs may be covered under the vehicle's emissions warranty.
This code has been more prevalent in vehicles with complex fuel vapor recovery systems.
Moderate – This issue should be addressed soon to avoid potential emissions problems.
Driving with a faulty fuel system can lead to increased emissions and potential safety hazards.
• Engine running
• Vehicle at operating temperature
The fuel tank pressure/temperature sensor is typically located on or near the fuel tank.
Q: Can I drive with a P11CD code?
A: It's possible to drive short distances, but it's best to have it checked soon to avoid potential issues.
Q: Will a P11CD code affect my fuel economy?
A: Yes, it can lead to decreased fuel efficiency if not addressed.
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