P0359

P0359 is the cylinder 9 ignition coil primary/secondary circuit fault — this code only appears on V10 engines (Dodge Viper 8.0/8.4L V10, Ford 6.8L V10 Triton in Super Duty trucks, BMW S85 5.0L V10 in M5/M6, Lamborghini Gallardo/Huracan V10, Audi R8 V10 / RS6 V10). Cylinder 9 location: on Ford 6.8L V10 it's the third cylinder on bank 2 (passenger side rear-middle), on Dodge Viper V10 it's typically the front of the right bank in the 1-10 numbering, on BMW S85 V10 it's bank 2 second position. Cheapest-first diagnostic: swap the cylinder 9 coil with a known-good coil of the same part number from a front-bank position, clear codes, drive cycle. Code follows = $40-$300 coil replacement (Ford 6.8L truck coils are cheap, BMW S85 and Lamborghini coils are not). Code stays at cylinder 9 = standard trigger wire / B+ feed / ground check, scope the trigger pulse for clean 0-5V or 0-12V square-wave at 3-6ms dwell. On BMW S85 and exotic V10s, do NOT guess on coils — these engines have tight coil specs and aftermarket parts cause cascading misfires; OE only, full-set replacement is standard practice on S85 above 60K miles.

Vehicle-specific patterns: 2005-2010 Ford F-250/F-350 6.8L V10 Triton 3V cylinder 9 P0359 — same TSB 08-7-6 family covers V10 Tritons; the rear-bank coils on the V10 are the most heat-soaked and most likely to fail first on towing-duty trucks. 2006-2010 BMW M5/M6 E60/E63 S85 5.0L V10 cylinder 9 P0359 from coil failure — S85 coils are batch-failure platform, and BMW recommends full-set replacement at any single-coil failure above 60K miles; rod bearings are the other S85 sword-of-Damocles, so a P0359 on a high-mileage S85 should trigger a rod-bearing inspection conversation. 2008-2014 Audi R8 V10 / 2009-2012 Lamborghini Gallardo LP560 V10 cylinder 9 P0359 — coils share with the Audi 4.2 V8 family, but access on the R8 requires rear-clip drop ($800-$1,500 labor before parts). 2003-2017 Dodge Viper 8.3/8.4L V10 cylinder 9 P0359 from aging Bosch coil packs — Viper V10 is firing-order 1-10-9-4-3-6-5-8-7-2 and cylinder 9 sits on the driver bank middle. Estimated repair: $40 (Ford 6.8L V10 single coil) to $4,800+ (BMW S85 full coil set + plugs + valve cover gaskets).