P2422 Honda Code - Evaporative Emission System Vent Valve Stuck Closed
Quick Answer
The fuel tank pressure (FTP) sensor output indicates about atmospheric pressure 0 kPa (0 in.Hg, 0 mmHg) before purge starts since the evaporative emission (EVAP) canister vent shut valve is normally open (open to the atmosphere). Common causes include Faulty Evaporative Emission Vent Shut Valve, Evaporative Emission Vent Shut Valve harness is open or shorted, Evaporative Emission Vent Shut Valve circuit poor electrical connection. 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
- P2422 Honda indicates Evaporative Emission System Vent Valve Stuck Closed.
- Common causes
- Common causes include Faulty Evaporative Emission Vent Shut Valve, Evaporative Emission Vent Shut Valve harness is open or shorted, Evaporative Emission Vent Shut Valve circuit poor electrical connection.
- 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 P2422 Honda Description
When the FTP sensor indicates vacuum after starting the engine, there is the possibility of an FTP sensor zero point shift failure or an EVAP canister vent shut valve stuck closed failure. So the Powertrain Control Module (PCM) monitors the FTP sensor output after purge starts. The PCM detects a malfunction of the EVAP canister vent shut valve if the output indicates excessive vacuum.
However, if the fuel tank internal pressure is below the specified value (excessive vacuum is detected) when starting the engine, the malfunction detection should be done as follows because it is difficult to distinguish the FTP sensor range problem (P1454) from the EVAP canister vent shut valve stuck closed (P2422).
1. If neither Temporary Diagnostic Trouble Code (DTC) (P1454 nor P2422) is stored, both DTCs are stored.
2. If both Temporary DTCs (P1454 and P2422) are stored and excessive vacuum is detected, both DTCs are stored.
3. If either Temporary DTC (P1454 or P2422) is stored and excessive vacuum is detected, the PCM stores the DTC of the Temporary DTC that was stored.
What are the Possible Causes of the DTC P2422 Honda?
- Faulty Evaporative Emission Vent Shut Valve
- Evaporative Emission Vent Shut Valve harness is open or shorted
- Evaporative Emission Vent Shut Valve circuit poor electrical connection
How to Fix the DTC P2422 Honda?
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 P2422 Honda 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.
Need more information about the P2422 Honda code?
Need more information on how to fix the P2422 Honda code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2422 Honda code diagnosed by a professional: Find a repair shop in your area
Information for Specific Honda Models
- P2422 2008 Honda Accord — Evaporative Emission System Vent Valve Stuck Closed
- P2422 2009 Honda Accord — Evaporative Emission System Vent Valve Stuck Closed
- P2422 2010 Honda Accord — Evaporative Emission System Vent Valve Stuck Closed
Frequently Asked Questions about P2422 Honda Code
1. What does the OBDII code P2422 Honda mean?
The code P2422 indicates a problem with the Evaporative Emission System Vent Valve being stuck closed in a Honda vehicle.
2. What are the common symptoms of a P2422 Honda code?
Common symptoms include the Check Engine Light illuminating on the dashboard, decreased fuel efficiency, and potential difficulties starting the vehicle.
3. What are the possible causes of the Evaporative Emission System Vent Valve getting stuck closed?
Some common causes include a faulty vent valve, a clogged vent valve, wiring issues, or a malfunctioning control module.
4. How serious is the P2422 Honda code?
While the vehicle may still be operable with this code, it is important to address it promptly to prevent potential damage to the emissions system and ensure optimal performance.
5. Can I continue driving with a P2422 Honda code?
It is generally safe to drive with this code in the short term, but it is recommended to have the issue diagnosed and repaired as soon as possible to avoid further complications.
6. How can the Evaporative Emission System Vent Valve Stuck Closed be repaired?
Repair options include replacing the vent valve, clearing any obstructions in the vent system, checking and repairing any damaged wiring, or resetting the control module.
7. Is it possible to fix the P2422 Honda code at home?
Depending on your mechanical skills and access to tools, it may be possible to address this issue at home. However, it is recommended to consult a professional mechanic for an accurate diagnosis and proper repair.
8. How long does it take to repair a P2422 Honda code?
The repair time can vary depending on the exact cause of the issue and the extent of the repairs needed. It can range from a quick fix to a more involved repair that may take a few hours.
9. Can a P2422 Honda code be cleared without fixing the underlying issue?
Clearing the code without addressing the root cause will only temporarily turn off the Check Engine Light. The issue will likely recur until the problem is properly diagnosed and repaired.
10. How can I prevent the P2422 Honda code from appearing in the future?
Regular maintenance, such as checking and replacing the vent valve as recommended by the manufacturer, can help prevent the recurrence of this code in the future.
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