What Does P2301 Mean?
The primary ignition coil driver circuit for cylinder A is detecting voltage higher than expected. This indicates an open circuit, high resistance, or loss of ground in the coil primary winding or control circuit.
Common Causes
35%
Open circuit in ignition coil primary winding
30%
Open or broken wire in primary control circuit
20%
Poor connection at coil connector or PCM
10%
Failed PCM coil driver transistor stuck open
5%
Corroded connector terminals preventing current flow
Diagnostic Steps
1
Step 1: Inspect ignition coil A connector for corrosion, damage, or loose pins
2
Step 2: Measure primary coil resistance and verify against specifications
3
Step 3: Check continuity of primary control wire from PCM to coil
4
Step 4: Swap coil A with another cylinder to verify if fault follows component
5
Step 5: Test PCM coil driver output with test light or oscilloscope during cranking
Estimated Repair Cost
$100 - $500
Parts + labor, varies by vehicle and location
The primary ignition coil driver circuit for cylinder A is detecting voltage higher than expected. This indicates an open circuit, high resistance, or loss of ground in the coil primary winding or control circuit.
The most common cause of P2301 (Ignition Coil "A" Primary Control Circuit High) is: Open circuit in ignition coil primary winding
Typical repair costs for P2301 range from $100 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Cylinder A will not fire, causing engine misfire, rough idle, and loss of power. Extended operation can damage catalytic converter due to unburned fuel.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2301 to identify the root cause.
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Quick Info
Category
Powertrain
System
Ignition System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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