P04B2
Refueling Vapor Control Valve Circuit High
P04B2 is an OBD-II diagnostic trouble code meaning: Refueling Vapor Control Valve Circuit High. Common causes: open or short circuit in valve wiring harness, evap solenoid valve malfunction. Estimated repair cost: $22–89.
Symptoms
- Check engine light is on
- Possible difficulties when refueling
- Increased fuel consumption (in some cases)
Causes
- Open or short circuit in valve wiring harness
- EVAP solenoid valve malfunction
- Corrosion or poor contact in connectors
- Relay or fuse problem
- Malfunction of the engine control unit (rare)
How to Fix
- Check the integrity of the wiring harness to the valve
- Check valve resistance (should be between 10-50 ohms)
- Inspect connectors for corrosion or damage
- Check the voltage at the valve connector when the ignition is turned on.
- Replace faulty valve if necessary
- Clear error memory and check if code is returned
Related codes
Error P04B2 by Vehicle Brand
FAQ
What does the P04B2 code mean?
P04B2 is an OBD-II diagnostic trouble code that indicates: Refueling Vapor Control Valve Circuit High
What causes a P04B2 error code?
The most common causes of P04B2 include: Open or short circuit in valve wiring harness; EVAP solenoid valve malfunction; Corrosion or poor contact in connectors; Relay or fuse problem.
How do I fix a P04B2 diagnostic trouble code?
To fix P04B2: Check the integrity of the wiring harness to the valve. Check valve resistance (should be between 10-50 ohms). Inspect connectors for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P04B2?
Limited driving only, diagnose soon
How much does it cost to fix P04B2?
The estimated repair cost for P04B2 is $22–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat