Ignition Coil B Primary Control Circuit High
Voltage on the primary control of ignition coil B exceeds the calibrated upper limit, indicating an electrical fault that prevents proper coil charging.
Affected components
- Ignition coil
- Coil driver
- Ignition wiring
Common causes
- High likelihood: Primary wire shorted to battery
- Medium likelihood: Open primary winding
- Low likelihood: Connector pins corroded - high contact resistance
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.