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 sensor that checks the pressure in the fuel tank is saying the pressure is too low.
The P11E9 code is triggered when the fuel tank pressure/temperature sensor sends a signal to the engine control module (ECM) that is outside the expected range, indicating low pressure.
The fuel tank pressure/temperature sensor monitors the pressure and temperature inside the fuel tank. If the sensor reports a pressure that is lower than expected, the ECM will log the P11E9 code. This could be due to a malfunctioning sensor, a wiring issue, or a problem with the fuel system itself.
• Check Engine Light illumination
• Possible fuel odor
• Decreased fuel efficiency
• Faulty fuel tank pressure/temperature sensor
• Wiring issues or poor electrical connections
• Leaks in the fuel tank or evaporative emission system
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the P11E9 code.
• Inspect the fuel tank pressure/temperature sensor and its wiring for damage.
• Check for leaks in the fuel tank and evaporative emission system.
• Replace the faulty fuel tank pressure/temperature sensor.
• Repair or replace damaged wiring or connectors.
• Fix any leaks in the fuel system.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regular maintenance checks
• Ensure proper sealing of the fuel cap
• Inspect fuel system components periodically
Sensor Issue
• Do not ignore the Check Engine Light.
• Get the vehicle checked by a professional mechanic.
• Avoid overfilling the fuel tank.
Check with your vehicle's manufacturer for warranty coverage on emissions-related components.
The P11E9 code has been associated with fuel system issues in various vehicle models, often related to sensor malfunctions.
Moderate – It is important to address this issue to prevent potential fuel system damage.
Driving with a fuel system issue may lead to increased emissions and potential safety concerns.
• Vehicle should be in a safe, stationary position.
• Ensure the fuel tank is not empty.
The fuel tank pressure/temperature sensor is typically located on or near the fuel tank.
Q: Can I drive with a P11E9 code?
A: While it may be possible to drive, it's not recommended as it could lead to further issues.
Q: How do I reset the Check Engine Light?
A: After fixing the issue, use an OBD-II scanner to clear the code, or disconnect the battery for a few minutes.
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Fitment Required · Vehicle-fitment part
Relevant when EVAP diagnosis points toward purge-flow or purge-control faults.
EVAP diagnosis often includes purge-flow and valve-control faults.
Confirm the failed valve and exact fitment before buying parts.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.