What are the possible causes of Hyundai DTC P1321?
NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.
- Faulty glow plug indicator bulb
- Glow indicator light circuit open or shorted
- Poor electrical connection in glow indicator circuit
- Faulty Engine Control Module (ECM)
How to repair Hyundai DTC P1321?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
What are the possible symptoms of Hyundai P1321 code?
- Check Engine Light On (or Service Engine Soon Warning Light)
What does Hyundai P1321 code mean?
The glow plug indicator is used to warn the driver when the glow plug is operating. The indicator light turns off when battery voltage is low. The glow duration and indicator light activation are fully controlled by the injection computer based on engine operating conditions. Glow plug operation begins immediately when the ignition is turned on. Post-heating involves alternately powering the glow plugs after engine start. However, the glow plug indicator does not illuminate during post-heating. All glow phases, except initial glow and start preparation glow, are canceled when the engine stops. Then, the glow plug indicator is illuminated for at least the duration of the initial glow and start preparation phase by the Engine Control Module (ECM).