OBD Guide
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P3138

Intake Flap For Airflow Control Control Difference

P3138 is an OBD-II diagnostic trouble code meaning: Intake Flap For Airflow Control Control Difference. Common causes: malfunction of the intake manifold flap, damage to wiring or connectors. Estimated repair cost: $17–111.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–111 (est.)

Symptoms

  • Reduced engine power
  • Unstable idling
  • Deteriorating fuel economy
  • Check Engine Light Illuminates
  • Jerks during acceleration

Causes

  • Malfunction of the intake manifold flap
  • Damage to wiring or connectors
  • Damper control solenoid valve malfunction
  • Damper position sensor malfunction
  • Engine control unit (ECU) malfunction

How to Fix

  1. Check the intake manifold flap for sticking or damage.
  2. Check wiring and connectors for damage or corrosion.
  3. Check the throttle control solenoid valve.
  4. Check the throttle position sensor.
  5. Check the engine control unit (ECU) for errors or damage.

Related codes

P3135P3136P3137

FAQ

What does the P3138 code mean?

P3138 is an OBD-II diagnostic trouble code that indicates: Intake Flap For Airflow Control Control Difference

What causes a P3138 error code?

The most common causes of P3138 include: Malfunction of the intake manifold flap; Damage to wiring or connectors; Damper control solenoid valve malfunction; Damper position sensor malfunction.

How do I fix a P3138 diagnostic trouble code?

To fix P3138: Check the intake manifold flap for sticking or damage.. Check wiring and connectors for damage or corrosion.. Check the throttle control solenoid valve.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P3138?

Yes, but get it checked soon

How much does it cost to fix P3138?

The estimated repair cost for P3138 is $17–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat