Code Definition

P1320 — Igniter circuit malfunction - No. 5

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Lexus

About P1320

P1320 is a manufacturer-specific powertrain diagnostic trouble code recorded for Lexus vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1320 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1320 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

On this Lexus the ECM commands each ignition coil through its igniter with an IGT timing signal and verifies that spark occurred using the returning IGF confirmation signal. DTC P1320 sets when the number 5 igniter circuit is commanded but the IGF confirmation does not return as expected, or an electrical fault is present in that circuit. This typically reflects a number 5 coil or igniter that is not firing or a break or short in its IGT or IGF wiring. The engine may misfire on that cylinder, run rough, lose power, or be hard to start when the code is set.

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