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 noticed that two sensors measuring the fuel's temperature are not agreeing with each other. It's like if two thermometers were showing different temperatures for the same cup of water.
The Engine Control Module (ECM) monitors the fuel temperature using multiple sensors. If the readings from these sensors do not match within a specified range, the ECM triggers this code.
The P2D86 code is set when the ECM detects a discrepancy between the readings from Fuel Temperature Sensor A and Fuel Temperature Sensor B. This could indicate a fault in one of the sensors or an issue with the wiring or connectors.
• Illuminated Check Engine Light
• Poor fuel economy
• Engine performance issues
• Difficulty starting the engine
• Faulty Fuel Temperature Sensor A
• Faulty Fuel Temperature Sensor B
• Wiring issues such as shorts or opens in the sensor circuit
• Corroded or damaged connectors
• ECM software issue
ECM: Engine Control Module, the computer that controls engine functions.
OBD-II: On-Board Diagnostics, a standardized system for vehicle diagnostics.
• Use an OBD-II scanner to confirm the code.
• Visually inspect the wiring and connectors of the fuel temperature sensors.
• Test the sensors individually with a multimeter to check for proper resistance.
• Check for any software updates for the ECM.
• Replace faulty fuel temperature sensors.
• Repair or replace damaged wiring or connectors.
• Update ECM software if necessary.
• Clear the code and test drive to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Screwdrivers and socket set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance and inspection of sensors.
• Keep fuel system clean and free from contaminants.
• Ensure proper installation of sensors during repairs.
Sensor Issue
• Do not ignore the Check Engine Light; have it diagnosed as soon as possible.
• Keep track of fuel economy to notice any changes.
• Regularly inspect the vehicle for any signs of wiring damage.
Check with your vehicle manufacturer as sensors may be covered under powertrain warranty.
This code has been reported in vehicles with dual fuel temperature sensors, primarily in models from the mid-2010s onward.
Moderate – While not immediately dangerous, it can lead to poor engine performance and should be addressed promptly.
Driving with a malfunctioning fuel system can lead to increased emissions and potential safety hazards.
• Engine at operating temperature
• Vehicle parked on a level surface
Fuel temperature sensors are typically located on the fuel rail or near the fuel tank.
Q: Can I drive with a P2D86 code?
A: While the car may still run, it's not recommended to drive for long periods with this code active as it can affect fuel efficiency and engine performance.
Q: How do I clear a P2D86 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is resolved, the code should not return.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.