What Does P1380 Mean?
The ignition coil for cylinder 2 is activating earlier than commanded by the ECM. This timing fault disrupts combustion efficiency and can damage engine components.
Common Causes
35%
Defective ignition coil with internal timing control fault
30%
ECM coil driver circuit malfunction
20%
Corroded or loose connector at ignition coil creating intermittent signal
10%
Timing sensor input errors from CKP or CMP sensors
5%
Ground circuit resistance in coil circuit
Diagnostic Steps
1
Step 1: Inspect cylinder 2 ignition coil connector for damage, corrosion, or terminal backing-out
2
Step 2: Swap cylinder 2 coil with another cylinder to determine if fault follows the coil
3
Step 3: Use oscilloscope to capture ignition coil trigger signal and compare timing to crankshaft position
4
Step 4: Verify crankshaft and camshaft position sensor signals are accurate and synchronized
5
Step 5: Test ECM coil driver output for proper timing and waveform; replace ECM if driver is faulty
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The ignition coil for cylinder 2 is activating earlier than commanded by the ECM. This timing fault disrupts combustion efficiency and can damage engine components.
The most common cause of P1380 (Ignition Coil - Cylinder 2 - Early Activation Fault) is: Defective ignition coil with internal timing control fault
Typical repair costs for P1380 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause rough idle, hesitation, and reduced power. Prolonged operation can damage the catalytic converter or cause engine knock.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1380 to identify the root cause.
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Quick Info
Category
Powertrain
System
Ignition System
Difficulty
Type
Manufacturer
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