OBD Guide
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P11C3

Intake Air Humidity Sensor Circuit High Voltage

P11C3 is an OBD-II diagnostic trouble code meaning: Intake Air Humidity Sensor Circuit High Voltage. Common causes: short circuit in the sensor circuit, air humidity sensor malfunction. Estimated repair cost: $28–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$28–89 (est.)

Symptoms

  • Increased fuel consumption
  • Reduced engine power
  • Unstable operation at idle
  • Check Engine Light Illuminates
  • Dips during acceleration

Causes

  • Short circuit in the sensor circuit
  • Air humidity sensor malfunction
  • Wiring harness damage
  • Problems with contacts in connectors
  • Engine ECU malfunction

How to Fix

  1. Check the integrity of wiring and connectors
  2. Measure the resistance and voltage of the sensor
  3. Check for short circuit in the circuit
  4. Replace the air humidity sensor if necessary
  5. Scan the system for other errors

Related codes

P11C2P11C4P0113

FAQ

What does the P11C3 code mean?

P11C3 is an OBD-II diagnostic trouble code that indicates: Intake Air Humidity Sensor Circuit High Voltage

What causes a P11C3 error code?

The most common causes of P11C3 include: Short circuit in the sensor circuit; Air humidity sensor malfunction; Wiring harness damage; Problems with contacts in connectors.

How do I fix a P11C3 diagnostic trouble code?

To fix P11C3: Check the integrity of wiring and connectors. Measure the resistance and voltage of the sensor. Check for short circuit in the circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P11C3?

Yes, but get it checked soon

How much does it cost to fix P11C3?

The estimated repair cost for P11C3 is $28–89. Actual cost depends on your vehicle, location, and labor rates.

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