P0301: Fallo de encendido detectado en el cilindro 1
Fallo de encendido detectado en el cilindro 1: Crankshaft acceleration drop isolated to Cylinder 1 firing event.
| Trouble Code (DTC) | P0301 |
|---|---|
| Official SAE Definition | Fallo de encendido detectado en el cilindro 1 |
| Vehicle Subsystem | powertrain |
| Driving Severity | HIGH |
Observable Symptoms
- Engine shaking at idle
- Flashing MIL under acceleration
- Unburned fuel smell
Most Probable Root Causes
- Faulty Cylinder 1 ignition coil or fouled spark plug
- Clogged or leaking Cylinder 1 fuel injector
- Low mechanical compression in Cylinder 1 (valve or ring wear)
Step-by-Step Diagnostic Procedure
- Swap Cylinder 1 ignition coil with Cylinder 2 and see if misfire moves to P0302
- Inspect Cylinder 1 spark plug gap and insulator
- Perform cylinder compression and leak-down test if ignition/fuel are OK