Ignition Coil "F" Secondary Circuit
Code P2317 indicates a malfunction in the secondary circuit of Ignition Coil F, which is responsible for generating the high voltage spark needed to ignite fuel in that cylinder. When this circuit fails, the affected cylinder cannot fire properly, causing misfires and reduced engine performance. The PCM may disable fuel injection to that cylinder to prevent engine damage.
What You Might Notice
- Engine misfire or rough idle
- Diminished engine performance and acceleration
- Reduced fuel efficiency
- Check Engine Light illuminated
- Possible cylinder-specific fault codes
Most Common Causes
- 1
Failed ignition coil pack
Ignition Coil F has internally failed or lost its winding integrity, preventing proper voltage generation for the secondary circuit.
- 2
Wiring or connector issues
Corroded, damaged, or loose connections in the coil wiring harness or PCM connector are preventing proper signal transmission to Coil F.
- 3
Engine control module fault
The PCM is malfunctioning or has failed, preventing it from properly driving the ignition coil circuit.
- 4
Spark plug or plug wire failure
A worn spark plug, damaged spark plug wire, or poor connection to the coil is creating resistance in the secondary circuit.
How to Diagnose It
- 1
Check Failed ignition coil pack — Ignition Coil F has internally failed or lost its winding integrity, preventing proper voltage generation for the secondary circuit.
- 2
Check Wiring or connector issues — Corroded, damaged, or loose connections in the coil wiring harness or PCM connector are preventing proper signal transmission to Coil F.
- 3
Check Engine control module fault — The PCM is malfunctioning or has failed, preventing it from properly driving the ignition coil circuit.
- 4
Check Spark plug or plug wire failure — A worn spark plug, damaged spark plug wire, or poor connection to the coil is creating resistance in the secondary circuit.
How to Fix It
- 1
Replace ignition coil pack F
Remove the failed ignition coil pack F and install a new OEM or quality aftermarket replacement. Ensure proper seating and connector engagement.
- 2
Inspect and repair wiring harness
Examine all connections from the PCM to Ignition Coil F for corrosion, loose terminals, or damaged insulation. Clean connectors or replace wiring as needed.
- 3
Test and replace PCM if needed
Use a diagnostic scanner to verify PCM output voltage to the coil circuit. If voltage is absent, the PCM may require reprogramming or replacement.
- 4
Verify spark plug and wire condition
Inspect the spark plug for wear and the plug wire for cracks or resistance issues. Replace spark plugs and wires if they show deterioration.
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