Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's system that controls how gasoline fumes are released isn't working right on one side of the engine. It's like a door that's supposed to open and close to let out fumes, but it's not doing it correctly.
The P1422 code indicates a problem with the purge flow in the EVAP (Evaporative Emission Control) system on the engine's Bank 2. The system is not purging the fuel vapors from the charcoal canister as expected.
The EVAP system captures fuel vapors from the fuel tank and stores them in a charcoal canister. The purge valve is responsible for controlling the flow of these vapors into the engine for combustion. The P1422 code is triggered when the purge flow is incorrect in Bank 2, which could be due to a malfunctioning purge valve, a leak, or a blockage in the system.
• Check Engine Light is on
• Increased emissions
• Fuel smell from the vehicle
• Faulty purge valve
• Blocked EVAP line
• Leaking EVAP system components
EVAP: Evaporative Emission Control System
Purge Valve: A component that controls the flow of fuel vapors from the charcoal canister to the engine.
• Use an OBD-II scanner to confirm the code and check for other related codes.
• Inspect the purge valve and EVAP lines for blockages or leaks.
• Perform a smoke test to identify any leaks in the EVAP system.
• Replace the faulty purge valve.
• Clear any blockages in the EVAP lines.
• Repair or replace leaking components in the EVAP system.
• OBD-II scanner
• Smoke machine
• Basic hand tools
$150 - $400
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect the EVAP system for leaks.
• Ensure proper maintenance of the fuel system.
• Use quality fuel to prevent contamination.
Emission Control Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid overfilling the fuel tank.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
The P1422 code has been associated with vehicles that have higher mileage and may be more common in older models due to wear and tear on the EVAP system components.
Moderate – While the vehicle may still be drivable, it is important to address this issue to prevent increased emissions and potential damage to other components.
Driving with a malfunctioning EVAP system can lead to increased emissions, which may not comply with local environmental regulations.
• Engine at operating temperature
• Vehicle idling
The purge valve is typically located near the engine, connected to the intake manifold and the EVAP canister.
Q: Can I drive with a P1422 code?
A: While you can drive with this code, it's best to fix it soon to avoid increased emissions and potential damage.
Q: What happens if I ignore the P1422 code?
A: Ignoring the code can lead to higher emissions and may affect vehicle performance over time.
Budget · Enhanced code reader
A wired color-screen reader with readiness hotkeys, live data, code definitions, and data logging.
Good for emissions-related codes because it exposes readiness monitors and live powertrain data.
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Specialty · Smoke machine
Helpful for finding EVAP and vacuum leaks that are hard to see with visual inspection alone.
Helpful for tracking down EVAP and vacuum leaks that can trigger emissions faults.
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Specialty · O2 sensor socket
Helpful when the code points toward exhaust or oxygen-sensor work and space is tight.
Useful when the diagnosis points toward oxygen-sensor removal or replacement.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.
Fitment Required · Vehicle-fitment part
Relevant when EVAP diagnosis points toward purge-flow or purge-control faults.
EVAP diagnosis often includes purge-flow and valve-control faults.
Confirm the failed valve and exact fitment before buying parts.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.