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P239C: Diesel Intake Air Flow B Control System - High Air Flow Detected

Severity
Medium
System
Powertrain

What Does P239C Mean?

P239C is a diagnostic trouble code indicating: Diesel Intake Air Flow B Control System - High Air Flow Detected. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P239C

Common Causes

Frequently Asked Questions

What does P239C mean?
P239C indicates: Diesel Intake Air Flow B Control System - High Air Flow Detected. The vehicle's computer has detected that the Diesel Intake Air Flow B Control System - High Air Flow Detected is not operating within its expected parameters and stored this diagnostic trouble code.
Can I drive with code P239C?
You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P239C for extended periods may cause additional problems.
How much does it cost to fix P239C?
Repair costs for P239C 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 Diesel Intake Air Flow B Control System - High Air Flow Detected and related wiring
  • 🔧 Replace faulty Diesel Intake Air Flow B Control System - High Air Flow Detected
  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

P2300 Ignition Coil A Primary Control Circuit Low P2301 Ignition Coil A Primary Control Circuit High P2302 Ignition Coil A Secondary Circuit P2303 Ignition Coil B Primary Control Circuit Low P2304 Ignition Coil B Primary Control Circuit High P2305 Ignition Coil B Secondary Circuit P2306 Ignition Coil C Primary Control Circuit Low P2307 Ignition Coil C Primary Control Circuit High P2308 Ignition Coil C Secondary Circuit P2309 Ignition Coil D Primary Control Circuit Low