P2307Ignition Coil C Primary Control Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2307 sets when the coil C control line, cylinder 3 in most layouts, is shorted to a voltage source. On GM's 3.6-litre LLT V6 (2008) the check is a continuity test against voltage that runs below 6,000 rpm with the battery between 9.99 and 18.1 V and needs 4 s at a stretch or 50 s in total. Do not trust the letter blindly on Ford: special service message 52342 for the 2021–2024 Bronco 2.3 and 3.0 EcoBoost explains that the PCM may file P2307 and its neighbours under the wrong cylinder, while still cutting fuel to the cylinder it has blamed. Ford's advice is a power balance test with its scan tool; the cylinder that drops out without a code of its own is the one to repair. Saab's Trionic 8 treats an open line on cylinder 3 as P2307 as well.
- What you may notice
- Check engine light on
- Cylinder 3 misfires
- Power loss, engine runs rough
- Likely causes
- LikelyCoil C control wire touching a battery-voltage line
- PossibleCoil C with an internal short to its supply
- PossibleCode filed against the wrong cylinder by PCM software (Ford Bronco SSM 52342)
- RareBroken control wire on systems reporting opens here (Saab Trionic 8)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.