What Are the Possible Causes of DTC P1300 Lexus?
NOTE: The causes listed may not be a complete list of all potential issues, and there may be other causes.
- Faulty ignition coil #1
- Ignition coil #1 harness is open or shorted
- Poor electrical connection in ignition coil #1 circuit
- Faulty Engine Control Module (ECM)
How to Fix DTC P1300 Lexus?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins. Search for P1300 Lexus questions and answers:
What Does Lexus Code P1300 Mean?
The Direct Ignition System (DIS) is a 1-cylinder ignition system that fires one cylinder with an ignition coil. The igniter is an integral part of the ignition coil. The Engine Control Module (ECM) determines the ignition timing and sends an ignition signal (IGT) for each cylinder. Based on the IGT signals, the igniter’s power transistors cut off the current to the ignition coil’s primary coil, causing the ignition coil to fire the spark plug. After sending a command to deactivate the primary circuit on the IGT wire, the ECM monitors the IGF circuit to ensure that the primary switching has occurred. Code P1300 relates to ignition coil #1 and is set when there is no IGF signal to the ECM during engine operation.