P0114 medium Severity

P0114: Intake Air Temperature (IAT) Sensor Circuit Intermittent (Bank 1)

Check Engine Light illuminated; possible reduced performance, rough idle, hard starting, or increased fuel consumption

Overview

OBD-II P0114 code indicates an intermittent fault in the intake air temperature sensor circuit (Bank 1), often caused by wiring issues, connector faults, or a failing IAT sensor. Common symptoms include check engine light, poor performance, and incorrect fuel trim. Diagnosis focuses on circuit continuity and sensor function.

Common Symptoms

  • Check Engine Light (MIL) illuminated
  • Poor fuel economy
  • Rough idle or hesitation
  • Hard starting
  • Erratic engine performance

Most Common Causes

Faulty intake air temperature (IAT) sensor high

Sensor intermittently reporting erratic voltage causing PCM detection of signal faults

Damaged or corroded IAT sensor wiring or connectors high

Common cause due to proximity to engine heat and vibration leading to intermittent opens/shorts

Loose or poor electrical connection at sensor or PCM medium

Intermittent connection can mimic sensor faults

Faulty mass air flow (MAF) sensor affecting correlated sensor data medium

MAF sensor faults can mislead related air temperature evaluation

ECM/PCM software or internal fault low

Rare but possible cause when all sensor circuits test good

Diagnostic Steps

  1. Retrieve and record all stored codes and freeze frame data with OBD-II scanner
    Expected: Presence of P0114 code possibly with related IAT or airflow sensor codes
    Interpretation: Confirms repeat or intermittent nature of fault
  2. Perform visual inspection of IAT sensor, wiring harness, and connectors
    Expected: No broken wires, corrosion, or loose pins
    Interpretation: Damage suggests wiring/connectivity cause
  3. Check IAT sensor reference voltage and ground at connector with multimeter
    Expected: Stable 5V reference and solid ground
    Interpretation: Missing reference/ground indicates circuit issue
  4. Measure IAT sensor output signal while engine running or use infrared thermometer to compare sensor reading
    Expected: Sensor output corresponds to actual intake air temperature changes
    Interpretation: Incorrect response indicates faulty sensor
  5. Inspect related MAF sensor and air intake components
    Expected: Proper airflow readings
    Interpretation: MAF issues can correlate to air temp anomalies

Repair Solutions

Repair or replace damaged IAT sensor wiring/connectors medium
Estimated Cost: $50 - $300

Repair complexity depends on harness accessibility and extent of damage

Replace faulty intake air temperature (IAT) sensor easy
Estimated Cost: $40 - $200

Typical part and labor costs; may vary by vehicle model

Repair or replace faulty mass air flow (MAF) sensor medium
Estimated Cost: $100 - $400

Consider if MAF codes accompany P0114

ECM/PCM reflash or replacement if internal fault hard
Estimated Cost: $200 - $1000

Rare; confirm with manufacturer diagnostics

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Replacing IAT sensor without diagnosing wiring or connectors
  • Assuming a clogged air filter directly causes P0114
  • Misattributing electrical noise from unrelated circuits

Frequently Asked Questions

What does the P0114 code mean?

Technically, the P0114 code represents Intake Air Temperature (IAT) Sensor Circuit Intermittent (Bank 1). It usually points to a fault within the Air Intake.

Can P0114 cause engine damage?

This is a medium priority issue. Check Engine Light illuminated; possible reduced performance, rough idle, hard starting, or increased fuel consumption

Symptoms associated with DTC P0114

The most typical signs are: Check Engine Light (MIL) illuminated, Poor fuel economy, Rough idle or hesitation.

Common triggers for the P0114 error

Potential culprits include: Faulty intake air temperature (IAT) sensor, Damaged or corroded IAT sensor wiring or connectors, Loose or poor electrical connection at sensor or PCM. A proper diagnosis is recommended.

How much does it cost to fix P0114?

Expect to pay around $200 if the issue is a Replace faulty intake air temperature (IAT) sensor, but up to $1000 if the ECM/PCM reflash or replacement if internal fault needs replacement.

Does P0114 affect Ford, Toyota, or Honda?

The P0114 code is a generic powertrain code, meaning it applies to almost all makes and models, such as Honda, Toyota, VW, Ford, and Chevy.

User Comments (0)

Share your experience or ask a question about this code.

Be the first to share your experience with P0114!