Powertrain, generic (extended)

P2315 Ignition Coil F Primary Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

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.

Likely causes

Coil F (cylinder 6) faulty
Fault in the bank 2 coil supply affecting coils 2, 4 and 6 (Saab LAU)
Coil F control wire chafed to ground near the rear of the engine
Engine module output defective

Symptoms

  • Check engine light on
  • Misfire on cylinder 6
  • Engine shakes, power down

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–400
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

ignition coilcoil driverignition wiring

Related codes

P2316P2317P0356P2312P0306

References: static.nhtsa.gov, saabwisonline.com, gsi.ext.gm.com, newtonnet.co.uk.