OBD Guide
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P122C

Intake Air Flow Valve Control Circuit Shorted

P122C is an OBD-II diagnostic trouble code meaning: Intake Air Flow Valve Control Circuit Shorted. Common causes: open or short circuit in wiring harness, control solenoid valve malfunction. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Unstable engine idling
  • Reduced engine power
  • Increased fuel consumption
  • Check Engine light comes on
  • Dips during acceleration

Causes

  • Open or short circuit in wiring harness
  • Control solenoid valve malfunction
  • Poor contact in connectors
  • Problems with the engine control unit
  • Mechanical valve jamming

How to Fix

  1. Check the integrity of the wiring harness
  2. Check control valve resistance
  3. Clean connector contacts
  4. Check valve operation mechanically
  5. Scan the control unit for other errors

Related codes

P122BP122DP122A

FAQ

What does the P122C code mean?

P122C is an OBD-II diagnostic trouble code that indicates: Intake Air Flow Valve Control Circuit Shorted

What causes a P122C error code?

The most common causes of P122C include: Open or short circuit in wiring harness; Control solenoid valve malfunction; Poor contact in connectors; Problems with the engine control unit.

How do I fix a P122C diagnostic trouble code?

To fix P122C: Check the integrity of the wiring harness. Check control valve resistance. Clean connector contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P122C?

Yes, but get it checked soon

How much does it cost to fix P122C?

The estimated repair cost for P122C is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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