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P1426: Tank Ventilation Valve Open Circuit

VOLKSWAGEN OTHER
Severity
Medium
System
Manufacturer-Specific Powertrain

What Does P1426 Mean?

P1426 is a manufacturer-specific diagnostic trouble code: Tank Ventilation Valve Open Circuit. This code applies to VOLKSWAGEN, OTHER vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.

Symptoms of P1426

Common Causes

Frequently Asked Questions

What does P1426 mean?
P1426 indicates: Tank Ventilation Valve Open Circuit. The vehicle's computer has detected that the Tank Ventilation Valve Open is not operating within its expected parameters and stored this diagnostic trouble code.
Can I drive with code P1426?
You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1426 for extended periods may cause additional problems.
How much does it cost to fix P1426?
Repair costs for P1426 typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

  • 🔧 Inspect and repair Tank Ventilation Valve Open wiring and connectors
  • 🔧 Replace faulty Tank Ventilation Valve Open
  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

P1400 Heated Catalyst Battery Voltage or Current Too Low During Heating Bank 1 P1401 DPFE Circuit High Input P1402 Heated Catalyst Power Switch Overtemperature Condition Bank 1 P1403 Differential Pressure Feedback Electronic Sensor Hoses Reversed P1404 IAT - B Circuit Malfunction/ Exhaust Gas Recirculation Closed Position Performance P1405 Differential Pressure Feedback Electronic Sensor Circuit Upstream Hose P1406 Differential Pressure Feedback Electronic Sensor Circuit Downstream Hose P1407 EGR Air Intrusion In Exhaust Supply To EGR Valve P1408 EGR System Flow Out Of Key On Engine Running Self Test Range P1409 Tank Ventilation Valve Electrical Malfunction