Subaru OBD-II 1996 & Newer models DTC P1440 – Fuel Tank Pressure Control System Low Input
DTC P1440 meaning on Subaru OBD-II 1996 & Newer models
The DTC P1440 code on Subaru OBD-II 1996 & Newer models indicates a low input signal from the fuel tank pressure control system. This system is responsible for monitoring and controlling the pressure inside the fuel tank to ensure proper emissions control and fuel system operation.
Subaru OBD-II 1996 & Newer models DTC P1440 symptoms
- Check Engine Light (CEL) illuminated on the dashboard
- Decreased fuel efficiency
- Issues with starting the vehicle
- Irregular idling or stalling
Subaru OBD-II 1996 & Newer models DTC P1440 causes
- Loose or damaged fuel cap
- Fuel tank pressure sensor malfunction
- Leak in the fuel tank or associated hoses
- Faulty fuel tank pressure control valve
Subaru OBD-II 1996 & Newer models DTC P1440 seriousness
The DTC P1440 code should not be ignored as it can lead to increased emissions, reduced fuel efficiency, and potential drivability issues. While the vehicle may still be operable, addressing this code promptly is recommended to prevent further damage to the fuel system.
How to diagnose DTC P1440 on Subaru OBD-II 1996 & Newer models
- Inspect the fuel cap for proper sealing
- Check for any visible leaks in the fuel tank or associated components
- Test the fuel tank pressure sensor for proper operation
- Verify the functionality of the fuel tank pressure control valve
How to fix DTC P1440 on Subaru OBD-II 1996 & Newer models
- Tighten or replace the fuel cap if it is loose or damaged
- Repair any leaks in the fuel tank or associated hoses
- Replace the fuel tank pressure sensor if faulty
- Replace the fuel tank pressure control valve if necessary
How to erase DTC P1440 on Subaru OBD-II 1996 & Newer models
To erase the DTC P1440 code on Subaru OBD-II 1996 & Newer models, you can use an OBD-II scanner to clear the code. After addressing the underlying issue that triggered the code, clearing it with the scanner will reset the Check Engine Light and the code from the vehicle’s memory.
Recommended tools for Subaru OBD-II 1996 & Newer models diagnostics
Explore our expert picks: The Best OBD2 Scanners for 2025
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.