OBD Guide
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P111D

Intake Air Temperature Sensor 1 - Fuel Temperature Sensor 2 Correlation

P111D is an OBD-II diagnostic trouble code meaning: Intake Air Temperature Sensor 1 - Fuel Temperature Sensor 2 Correlation . Common causes: intake air temperature (iat) sensor malfunction, malfunction of the fuel temperature sensor (fts). 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 operation at idle
  • Increased fuel consumption
  • Reduced engine power
  • Check Engine Light Illuminates
  • Problems starting the engine in cold weather

Causes

  • Intake Air Temperature (IAT) Sensor Malfunction
  • Malfunction of the fuel temperature sensor (FTS)
  • Damage or oxidation of contacts in the electrical circuit of the sensors
  • Problems with the wiring harness between the sensors and the ECU
  • Software error in the engine control unit

How to Fix

  1. Check the intake air temperature sensor readings using a diagnostic scanner
  2. Check fuel temperature sensor readings
  3. Inspect electrical connections and sensor wiring harness
  4. If necessary, replace the faulty sensor
  5. Check and update the ECU firmware if necessary

Related codes

P0112P0113P0182P0183

FAQ

What does the P111D code mean?

P111D is an OBD-II diagnostic trouble code that indicates: Intake Air Temperature Sensor 1 - Fuel Temperature Sensor 2 Correlation

What causes a P111D error code?

The most common causes of P111D include: Intake Air Temperature (IAT) Sensor Malfunction; Malfunction of the fuel temperature sensor (FTS); Damage or oxidation of contacts in the electrical circuit of the sensors; Problems with the wiring harness between the sensors and the ECU.

How do I fix a P111D diagnostic trouble code?

To fix P111D: Check the intake air temperature sensor readings using a diagnostic scanner. Check fuel temperature sensor readings. Inspect electrical connections and sensor wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P111D?

Yes, but get it checked soon

How much does it cost to fix P111D?

The estimated repair cost for P111D is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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