What Does P2307 Mean?
The PCM has detected an abnormally high voltage condition in the primary control circuit for ignition coil C. This indicates an open circuit in the wiring or coil, or a failed PCM driver circuit.
Common Causes
35%
Open circuit in primary control wire between PCM and coil C
30%
Failed ignition coil C with internal open circuit in primary winding
20%
Corroded or damaged connector pins at coil C or PCM
15%
Failed PCM ignition coil driver circuit open internally
Diagnostic Steps
1
Step 1: Inspect ignition coil C connector and PCM connector for corrosion, bent pins, or loose connections
2
Step 2: Test continuity of control wire from PCM to ignition coil C connector (should have continuity)
3
Step 3: Check primary winding resistance in ignition coil C and verify it's within specifications
4
Step 4: Test power supply and ground circuits to ignition coil C for proper voltage
5
Step 5: If all circuits test good, perform coil swap test or replace PCM if coil tests within specs
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The PCM has detected an abnormally high voltage condition in the primary control circuit for ignition coil C. This indicates an open circuit in the wiring or coil, or a failed PCM driver circuit.
The most common cause of P2307 (Ignition Coil "C" Primary Control Circuit High) is: Open circuit in primary control wire between PCM and coil C
Typical repair costs for P2307 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Cylinder C will not fire causing significant power loss and rough operation. Extended operation can cause catalytic converter damage from unburned fuel.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2307 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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