Subaru OBD-II 1996 & Newer models DTC P1420 – Fuel Tank Pressure Control Solenoid High Input
DTC P1420 meaning on Subaru OBD-II 1996 & Newer models
The DTC P1420 for Subaru OBD-II 1996 & Newer models indicates a high input signal from the fuel tank pressure control solenoid circuit. This means that the Engine Control Module (ECM) has detected an abnormal voltage level in the solenoid circuit, which can affect the proper operation of the fuel tank pressure control system.
Subaru OBD-II 1996 & Newer models DTC P1420 symptoms
- Check Engine Light (MIL) illuminated
- Decreased fuel efficiency
- Irregular engine idling
- Possible fuel odor
Subaru OBD-II 1996 & Newer models DTC P1420 causes
- Faulty fuel tank pressure control solenoid
- Open or short circuit in the solenoid wiring
- Corroded or poor electrical connections
- Defective ECM
Subaru OBD-II 1996 & Newer models DTC P1420 seriousness
The DTC P1420 is not considered a critical issue that would immediately affect the drivability of the vehicle. However, it can lead to decreased fuel efficiency and potential emissions problems if left unresolved.
How to diagnose DTC P1420 on Subaru OBD-II 1996 & Newer models
- Use an OBD-II scanner to retrieve the trouble codes and freeze frame data
- Inspect the fuel tank pressure control solenoid and its wiring for any visible damage
- Check the electrical connections for corrosion or poor contact
- Perform a voltage test on the solenoid circuit to verify proper operation
How to fix DTC P1420 on Subaru OBD-II 1996 & Newer models
- Replace the faulty fuel tank pressure control solenoid
- Repair any open or short circuits in the solenoid wiring
- Clean or replace corroded electrical connections
- If necessary, replace the ECM with a new unit
How to erase DTC P1420 on Subaru OBD-II 1996 & Newer models
To clear the DTC P1420 from the ECM’s memory, you can use an OBD-II scanner to reset the codes. Once the issue has been addressed and fixed, clearing the trouble code will turn off the Check Engine Light and reset the system for monitoring future faults.
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.