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P1116 – Mazda DTC

Mazda DTC P1116 – ECT Sensor Circuit Out of Self Test Range

DTC P1116 meaning on Mazda

  1. DTC P1116 on a Mazda indicates that the Engine Coolant Temperature (ECT) sensor circuit is out of self-test range.

Mazda DTC P1116 symptoms

  1. Check Engine Light (CEL) illuminated on the dashboard.
  2. Engine may run rough or have poor performance.
  3. Decreased fuel efficiency.

Mazda DTC P1116 causes

  1. Defective ECT sensor.
  2. Wiring or connector issues in the ECT sensor circuit.
  3. ECU (Engine Control Unit) malfunction.

Mazda DTC P1116 seriousness

  1. While the vehicle may still be operable with this issue, it can lead to poor engine performance and reduced fuel efficiency.
  2. Continued driving with this fault unresolved may cause further damage to the engine over time.

How to diagnose DTC P1116 on Mazda

  1. Use an OBD-II scanner to retrieve the specific fault code (P1116).
  2. Inspect the ECT sensor and its wiring for any visible damage or corrosion.
  3. Check the ECT sensor resistance with a multimeter to verify its functionality.
  4. Perform a thorough inspection of the ECT sensor circuit for any shorts or open circuits.

How to fix DTC P1116 on Mazda

  1. Replace the faulty ECT sensor if it is found to be defective.
  2. Repair any damaged wiring or connectors in the ECT sensor circuit.
  3. If the issue persists, consider checking the ECU for any malfunctions and address accordingly.

How to erase DTC P1116 on Mazda

  1. After resolving the underlying issue causing DTC P1116, use an OBD-II scanner to clear the fault code.
  2. Ensure that the repair has been successful by monitoring the vehicle for any recurring issues.

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