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P1340 – Lexus DTC

Lexus DTC P1340 – Igniter Circuit Malfunction (No. 8)

DTC P1340 meaning on Lexus

DTC P1340 for Lexus refers to an Igniter Circuit Malfunction (No. 8). This diagnostic trouble code indicates an issue with the ignition system’s circuit for cylinder No. 8.

Lexus DTC P1340 symptoms

Symptoms of DTC P1340 on a Lexus may include:

  • Engine misfires
  • Loss of power
  • Rough idling
  • Difficulty starting the engine

Lexus DTC P1340 causes

Common causes of DTC P1340 on a Lexus include:

  • Faulty ignition coil
  • Wiring issues in the ignition circuit
  • Defective spark plug
  • ECU (Engine Control Unit) malfunction

Lexus DTC P1340 seriousness

Ignoring DTC P1340 on a Lexus can lead to potential engine performance issues, reduced fuel efficiency, and further damage to engine components. It is advisable to address this code promptly to prevent more severe problems.

How to diagnose DTC P1340 on Lexus

To diagnose DTC P1340 on a Lexus, follow these steps:

  1. Use an OBD-II scanner to retrieve the trouble codes.
  2. Inspect the ignition coil, spark plug, and wiring for any visible damage.
  3. Check the ECU for any signs of malfunction.
  4. Perform a continuity test on the ignition circuit for cylinder No. 8.

How to fix DTC P1340 on Lexus

To fix DTC P1340 on a Lexus, consider the following:

  1. Replace the faulty ignition coil if necessary.
  2. Inspect and replace any damaged wiring in the ignition circuit.
  3. Replace the spark plug if it is worn out or defective.
  4. If the ECU is faulty, consider repairing or replacing it.

How to erase DTC P1340 on Lexus

To erase DTC P1340 on a Lexus:

  1. Use an OBD-II scanner to clear the trouble codes.
  2. Ensure that the underlying issue causing the code has been resolved.
  3. Perform a test drive to confirm that the code does not reappear.

Recommended tools for Lexus diagnostics

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← All Lexus Diagnostic Trouble Codes

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