Ignition Coil Primary Circuit Fuse B
The ECM detects an open or blown fuse on the ignition coil primary supply circuit B. Affected coils receive no operating voltage.
Affected components
- Ignition coil fuse b
- Ignition coils
- Wiring harness
Common causes
- High likelihood: Primary supply fuse blown by short circuit
- Medium likelihood: Shorted ignition coil drawing excess current
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- Reduced-power or limp mode may occur
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.