P1420 Lexus Code - EVAP Canister Small Leak
Quick Answer
This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using engine intake manifold vacuum. Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1420 Lexus indicates EVAP Canister Small Leak.
- Common causes
- Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1420 Lexus Description
The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the EVAP purge line off. The EVAP canister purge volume control solenoid valve is opened to depressurize the EVAP purge line using intake manifold vacuum. After this depressurization is implemented, the EVAP canister purge volume control solenoid valve will be closed.
What are the Possible Causes of the DTC P1420 Lexus?
- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- Faulty EVAP Purge solenoid
How to Fix the DTC P1420 Lexus?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1420 Lexus code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1420 Lexus Code
1. What are the common symptoms of OBDII code P1420 in a Lexus related to the EVAP canister small leak?
The common symptoms include the check engine light illuminating on the dashboard, a noticeable fuel odor, and potential issues with the vehicle's emissions system.
2. What are the possible causes of the EVAP canister small leak triggering code P1420 in a Lexus?
Potential causes include a loose or damaged gas cap, a cracked or damaged EVAP canister, a faulty purge valve, damaged vacuum hoses, or a malfunctioning fuel tank pressure sensor.
3. How can I diagnose the source of the EVAP canister small leak causing code P1420 in my Lexus?
Using a diagnostic scanner to retrieve the specific trouble code, conducting a visual inspection of the EVAP system components, performing a smoke test to locate leaks, and checking the gas cap for proper sealing are common diagnostic steps.
4. Can driving with the OBDII code P1420 related to the EVAP canister small leak cause any long-term damage to my Lexus?
Continued driving with this issue can potentially lead to increased emissions, reduced fuel efficiency, and may cause damage to other components of the vehicle's emissions system over time.
5. What are some repair tips for addressing the EVAP canister small leak associated with code P1420 in a Lexus?
Repair tips include ensuring the gas cap is tightened properly, replacing any damaged or cracked EVAP system components, checking and replacing faulty purge valves or sensors, and clearing the trouble code after repairs are completed.
6. Can I fix the EVAP canister small leak triggering code P1420 in my Lexus by myself, or should I seek professional help?
While some simple fixes like tightening the gas cap can be done by yourself, diagnosing and repairing more complex EVAP system issues may require professional help to ensure proper diagnosis and repair.
7. How much does it typically cost to repair the EVAP canister small leak causing code P1420 in a Lexus?
The cost of repairs can vary depending on the specific cause of the issue, but it may range from $100 to $500 or more, including parts and labor.
8. Are there any preventive measures I can take to avoid encountering the EVAP canister small leak code P1420 in my Lexus in the future?
Regularly checking and tightening the gas cap, performing routine maintenance on the EVAP system components, and addressing any fuel system issues promptly can help prevent the recurrence of this trouble code.
9. Will resetting the check engine light after repairing the EVAP canister small leak code P1420 in my Lexus make it go away permanently?
Resetting the check engine light will clear the code temporarily, but if the underlying issue causing the code is not addressed and fixed, the code may reappear in the future.
10. Is it safe to continue driving my Lexus with the OBDII code P1420 related to the EVAP canister small leak if I am unable to repair it immediately?
While driving with this issue is generally safe in the short term, it is recommended to address the problem promptly to prevent potential long-term damage to the vehicle's emissions system and ensure optimal performance.
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