P2315Ignition Coil F Primary Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2315 indicates that the switching line of coil F – cylinder 6 – is grounded, so six-, eight- and larger engines only. Several makers name the cylinder outright: VW's 2014 Touareg table for the six-cylinder petrol engine CGRA speaks of the ignition coil of cylinder 6, Saab's 9-5 2.8 V6 of coil 6, and GM's 2008 3.6 V6 (LLT) lists P2315 with the other five ground-short codes. On the Saab V6, coil 6 shares the bank 2 supply with coils 2 and 4, while coils 1, 3 and 5 hang on bank 1, so a supply fault on one bank shows as a set of odd or even codes. Ford's general summary covers the series up to P2327. Ford's 2024 bulletins on wrongly mapped coil codes list the E and G codes but not P2315.
- What you may notice
- Check engine light on
- Misfire on cylinder 6
- Engine shakes, power down
- Likely causes
- LikelyCoil F (cylinder 6) faulty
- PossibleFault in the bank 2 coil supply affecting coils 2, 4 and 6 (Saab LAU)
- PossibleCoil F control wire chafed to ground near the rear of the engine
- RareEngine module output defective
- 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.