P2422 OBD-II Trouble Code: Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P2422 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2422 code

P2422 is a diagnostic trouble code (DTC) for "Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P2422 DIAGNOSTIC Get a fair and transparent estimate upfront

Diagnostic Trouble Code (DTC): P2422

P2422 code definition

Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed

Related Trouble Codes:

  • P2441: EVAP Vent Valve Stuck Open

EVAP trouble codes that may be a symptom of the P2422 trouble code:

  • P0400: EVAP Malfunction
  • P0441: EVAP Incorrect Purge Flow
  • P0442: EVAP Leak Detected - Small Leak
  • P0443: EVAP Purge Control Valve Circuit
  • P0444: EVAP Purge Control Valve Circuit Open
  • P0445: EVAP Purge Control Valve Circuit
  • P0446: EVAP Vent Control Circuit Malfunction
  • P0447: EVAP Vent Control Circuit Open
  • P0448: EVAP Vent Control Circuit Shorted
  • P0449: EVAP Vent Valve/Solenoid Circuit Malfunction
  • P0450: EVAP Pressure Sensor Malfunction
  • P0451: EVAP Pressure Sensor Range/Performance
  • P0452: EVAP Pressure Sensor Low Input
  • P0453: EVAP Pressure Sensor High Input
  • P0454: EVAP Pressure Sensor Intermittent
  • P0455: EVAP Leak Detected-gross leak
  • P0456: EVAP Small Leak Detected]
  • P0457: EVAP Leak Detected]
  • P0458: EVAP Purge Control Valve Circuit Low
  • P0459: EVAP Purge Control Valve Circuit High

What the P2422 code means

The P2422 diagnostic trouble code is an indication that the vent valve of the evaporative emissions control system (EVAP) is stuck closed.

The EVAP system reduces harmful pollutants, generated by the engine combustion process, from being expelled into the environment. Fuel vapors are allowed into the engine through the EVAP vent valve. The vent valve regulates the amount of fuel vapors that will be permitted into the engine. If the EVAP vent valve is stuck in the closed position, fuel vapors will be prevented from flowing through the vent valve and into the engine.

The powertrain control module (PCM) receives a voltage signal from the vent valve control circuit. This voltage signal carries information regarding the pressure and flow of the EVAP system. When this voltage signal does not fall within the predetermined voltage specifications set by the manufacturer, the PCM will store the P2422 diagnostic trouble code and the Check Engine Light will come on.

What causes the P2422 code?

  • Faulty vent valve
  • Faulty vent valve control solenoid
  • Faulty pressure sensor
  • Faulty purge control solenoid
  • Faulty flow sensor
  • Loose or missing fuel cap
  • Vacuum hoses that are damaged, loose or broken
  • Fuel vapor hoses that are damaged, loose or broken
  • EVAP wires that are damaged, broken or have shorts
  • EVAP connectors that are damaged or corroded
  • Faulty PCM

What are the symptoms of the P2422 code?

  • Check Engine Light is on
  • No symptoms present at all
  • Other diagnostic trouble codes related to the EVAP system stored by the PCM

How does a mechanic diagnose the P2422 code?

  1. Uses an OBD-II scanner to collect all trouble codes that have been stored by the PCM, as well as freeze frame data

  2. Checks the EVAP system wiring for breaks, frays, corrosion, and shorts

  3. Checks the EVAP system connectors for bent pins, broken plastic, or corrosion

  4. Repairs or replaces faulty EVAP system wires and connectors

  5. Checks the fuel cap to ensure that it is properly affixed to the fuel inlet (the fuel cap should be tested with a fuel cap tester if available)

  6. Clears all trouble codes and completes a test drive to see if the P2422 trouble code comes back

  7. If the P2422 trouble code does come back, checks the EVAP system vacuum lines and hoses for damage or loose connections.

  8. Repairs or replaces any damaged or loose vacuum lines and hoses

  9. Clears all trouble codes and completes a test drive to see if the P2422 trouble code comes back

  10. If the P2422 trouble code does come back, checks the charcoal canister for damage

  11. Tests the leak detection pump using the directions in the manufacturer’s service manual

  12. Uses a scan tool to test EVAP controllers and components

If other EVAP system diagnostic trouble codes have been stored by the PCM, they should be diagnosed in the order that they appear in the OBD-II scanner.

Common mistakes when diagnosing the P2422 code

  • Vacuum leaks are not discovered and repaired before replacing EVAP components. There are times when vacuum leaks are the cause of the P2422 trouble code and replacing EVAP components is not necessary.

  • Extensive amounts of time are used to detect vacuum leaks without testing for proper operation of the EVAP leak detection pump.

How serious is the P2422 code?

A diagnostic trouble code is normally considered serious when it causes driveability issues or a change in performance. The P2422 diagnostic trouble code is not known to cause driveability or performance issues. For this reason, it is not considered serious, but should be addressed in a timely manner.

Allowing diagnostic trouble codes to be stored in the PCM without being addressed for an extended amount of time may cause damage to other engine components.

What repairs can fix the P2422 code?

  • Replacing a faulty vent valve
  • Replacing a faulty vent valve control solenoid
  • Replacing a faulty pressure sensor
  • Replacing a faulty purge control solenoid
  • Replacing a faulty flow sensor
  • Tightening or replacing the fuel cap
  • Repairing or replacing damaged, loose or broken vacuum hoses
  • Repairing or replacing damaged, loose or broken fuel vapor hoses
  • Repairing or replacing damaged, broken, or shorted EVAP wires
  • Repairing or replacing damaged or corroded EVAP connectors
  • Replacing and reprogramming a faulty PCM

Additional comments for consideration regarding the P2422 code

The diagnosis process for the P2422 trouble code will take time and attention to detail to properly diagnose and repair. It will be helpful to use a smoke machine in order to find vacuum leaks in the EVAP control system.

Need help with a P2422 code?

YourMechanic offers certified mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
P2422
Check Engine Light

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P2422 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

4,912

Rating Summary
4,525
187
48
28
124
4,525
187
48
28
124

Pardeep

19 years of experience
598 reviews
Pardeep
19 years of experience
Chevrolet Impala - Check Engine Light is on Inspection - San Jose, California
Pardeep showed up at the time scheduled. He called prior to arriving and informed me of his arrival. He trouble shot he check eengine light. Step by step he informed me of what he was.checking, and answered was all my questions. He wasted no time and got the vehicle to run long enough to determine next steps we will need to take. He never tried to bs me, or false promises (Like the dealership). He explained what he could do and what he could not, in regards to repairs ifneeded. i had a good 1st tike experience with "Your Mechanic" . Although the previous mechanic (Brock) they had assigned canceled the appoinent I scheduled; saying that they could not perform what clealy, Pardeep was able to do. Thank you Pardeep! 

Michael

36 years of experience
94 reviews
Michael
36 years of experience
Volkswagen Beetle - Check Engine Light is on - Brea, California
Michael is friendly and professional. He has lots of experience and tries his best to try and figure out what's wrong with your car.

Michael

10 years of experience
39 reviews
Michael
10 years of experience
Chevrolet Malibu - Check Engine Light is on - Atlanta, Georgia
I would highly recommend Michael. He was professional and helped me to better understand car trouble.

Nathan

15 years of experience
194 reviews
Nathan
15 years of experience
Hyundai Accent - Check Engine Light is on - Austin, Texas
Very Knowledgeable, quick response, and very kind! Thanks Nathan for your excellent customer service and repair assessment!

More related articles

B2109 OBD-II Trouble Code: Heated Windshield Relay Short to Vbatt
B2109 trouble code means there's an issue with a heated windshield relay, caused by damaged windshield wires, blown fuses, or a shorted relay.
P2055 OBD-II Trouble Code: Reductant Injector Circuit High Bank 1 Unit 2
P0255 code means there is an issue with the reductant injector air pressure sensor often due too loose wiring or faulty sensors.
P0929 OBD-II Trouble Code: Gear Shift Lock Solenoid Circuit Range/Performance
P0929 means there is an issue with the gear shift lock solenoid circuit, possibly due to fluid or battery voltage issues, or faulty wiring.

Related questions

Limp mode

If you do not use the recommended fluid for Chrysler or any transmissions in general, it can cause the transmission to have shifting and slipping concerns. Even damage can be caused from incorrect fluids being used. This is why I...

Obd plug in on my 1995 won't read any on my Obd meter

OBD-II came out in late 1995 in some vehicles, and all vehicles from 1996 onwards. You may need to try an OBD-1 scan tool or try to obtain the codes another way. It is also possible that you have some...

My Jeep stalls when I let it get below half a tank. Any ideas as to what the issue may be?

Hi there. I would believe, if the fuel tank inner liner was the issue, the stalling would occur at any fuel level. The dealer should be able to identify, any revisions to the fuel tank part number. It may be,...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com