What Does P2325 Mean?
The PCM has detected an abnormally high voltage in the primary control circuit for ignition coil I. This indicates a potential short to voltage, open circuit, or failed ignition coil driver in the PCM.
Common Causes
35%
Damaged wiring or connector causing short to voltage in coil primary circuit
30%
Failed ignition coil with internal short
20%
PCM internal driver circuit failure
15%
Corroded or damaged coil connector pins
Diagnostic Steps
1
Step 1: Visually inspect ignition coil I connector and wiring for damage, corrosion, or shorts to voltage
2
Step 2: Disconnect coil I and measure resistance across primary terminals (typically 0.4-2.0 ohms)
3
Step 3: With coil disconnected, check for voltage at PCM control wire (should be 0V key on, engine off)
4
Step 4: Check for continuity and shorts to voltage in wiring between PCM and coil connector
5
Step 5: If all wiring and coil test good, suspect PCM driver circuit failure
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The PCM has detected an abnormally high voltage in the primary control circuit for ignition coil I. This indicates a potential short to voltage, open circuit, or failed ignition coil driver in the PCM.
The most common cause of P2325 (Ignition Coil "I" Primary Control Circuit High) is: Damaged wiring or connector causing short to voltage in coil primary circuit
Typical repair costs for P2325 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause engine misfire, reduced power, and potential catalyst damage if driven extended periods. Vehicle may be drivable but performance will be affected.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2325 to identify the root cause.
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Quick Info
Category
Powertrain
System
Ignition System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
