P1321 — GMC
P1321 — GMC: Electronic Ignition System Fault Line
Code breakdown
P — System
Powertrain (engine, transmission, fuel & emissions)
1 — Type
Manufacturer-specific
3 — Subsystem
Ignition system or misfire
Manufacturer-specific meanings (GMC)
- Electronic Ignition System Fault Line
- Knock Sensor 3 Circuit Low Input