B0239
Air Flow Control 1 Circuit Performance
B0239 is an OBD-II diagnostic trouble code meaning: Air Flow Control 1 Circuit Performance. Common causes: open/short circuit in wiring harness, faulty vvt or egr solenoid. Estimated repair cost: $33–167.
Symptoms
- Unstable idle
- Reduced engine power
- Increased fuel consumption
- Check Engine Light Illuminates
Causes
- Open/short circuit in wiring harness
- Faulty VVT or EGR solenoid
- Throttle valve contamination
- Problems with power or circuit ground
- Mechanical damage to air control system components
How to Fix
- Check the condition of the wiring harness and contacts in the control circuit
- Test solenoid resistance (VVT/EGR)
- Clean the throttle valve and check its operation
- Check scanner control circuit parameters
- If necessary, replace faulty components
Related codes
Error B0239 by Vehicle Brand
FAQ
What does the B0239 code mean?
B0239 is an OBD-II diagnostic trouble code that indicates: Air Flow Control 1 Circuit Performance
What causes a B0239 error code?
The most common causes of B0239 include: Open/short circuit in wiring harness; Faulty VVT or EGR solenoid; Throttle valve contamination; Problems with power or circuit ground.
How do I fix a B0239 diagnostic trouble code?
To fix B0239: Check the condition of the wiring harness and contacts in the control circuit. Test solenoid resistance (VVT/EGR). Clean the throttle valve and check its operation. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B0239?
Limited driving only, diagnose soon
How much does it cost to fix B0239?
The estimated repair cost for B0239 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat