Skip to content
GTECH Calibration
Portal

P1114

Intake Air Temperature Sensor Circuit Low Input.

  • Mazda
  • Powertrain
  • Manufacturer code
  • Low severity

How this code is built

P
SystemPowertrain
1
Defined byThe manufacturer
1
AreaFuel and air metering
14
FaultThe specific fault in that area

What it means

On a Mazda, P1114 means the engine control unit has seen the intake air temperature sensor signal fall too low, which corresponds to an implausibly high air temperature. The voltage is typically near zero, pointing to a short to earth or a faulty sensor. The control unit then ignores the sensor reading and uses a default value instead.

Symptoms

  • Malfunction indicator lamp on
  • Rough or unstable idle
  • Hesitation or poor performance under acceleration
  • Hard starting, particularly when cold
  • Poorer fuel economy
  • Black smoke or a rich running smell in some cases

Possible causes

  • Faulty intake air temperature sensor (internal short or drifted resistance)likely
  • Signal wire shorted to earth, with chafed or damaged insulationlikely
  • Water ingress, corrosion or damaged pins in the sensor connectorpossible
  • Sensor signal and sensor earth wires shorted together in the harnesspossible
  • Sensor integrated into the airflow meter or intake duct failing (depends on model and engine)possible
  • Fault inside the engine control unitrare

How to diagnose

  1. Read the stored and pending codes and the freeze frame data, noting engine temperature and load when the fault set.
  2. Check live data for intake air temperature: with a cold engine it should be close to ambient, and a reading far too high (often at the maximum) suggests a short.
  3. Inspect the sensor, its connector and the nearby harness for damage, chafing, water, corrosion or loose pins.
  4. Unplug the sensor with the ignition on: the reading should swing to a very low temperature if the wiring and control unit are fine. If it stays high, the signal wire is shorted to earth.
  5. Measure the sensor's resistance and compare it with the manufacturer's temperature-resistance specification for your model.
  6. Check the signal wire for continuity and for shorts to earth and to the sensor earth wire, with the control unit disconnected.
  7. Check the reference voltage and earth at the connector against the wiring diagram, as the sensor layout varies by model and engine.
  8. Wiggle the harness with the engine running to find intermittent faults, then clear the code and road test.

How to fix

  • Replace the intake air temperature sensor, or the airflow meter assembly if the sensor is not sold separately on your model.
  • Repair or replace the damaged signal or earth wiring, and secure it clear of sharp edges and heat.
  • Clean or repair the connector terminals, or renew the connector if corroded or damaged.
  • Seal or correct any water ingress path, then dry the connector.
  • Have the control unit tested and repaired or replaced only after the sensor and wiring are proven good.

Can I keep driving?

Low severity

The car can normally be driven as the control unit uses a default air temperature value, but it may run poorly and use more fuel. Book it in soon rather than ignoring it, and stop if the car runs very roughly or stalls.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.

This code for other makes

Nearby codes