P0289

P0289 indicates the cylinder 10 injector driver circuit is reading high (open) when commanded low, applicable only to V10 engines. Cheapest first: swap injector 10 with a neighbor and clear codes; a migrating code confirms an open winding. Ohm test: PFI 11 to 17 ohms expected (Ford 6.8L, Viper 8.3L), BMW S85 GDI-style runs 1.5 to 4 ohms; OL confirms broken winding. Key-on engine-off, feed pin should read battery voltage, driver pin should rise to within 1V of battery through the coil. With scope on driver line during crank, expect clean square pulldown under 1.0V at each pulse command; missing pulse means open between PCM and injector or failed driver. Caveat: on the Ford 6.8L Triton, the cylinder 10 plug well is famous for blowouts (the 2V threads are notoriously shallow), so always inspect for spark-plug ejection damage before condemning injector or harness; a blown plug can both damage the harness and depressurize that cylinder enough to confuse misfire diagnostics.

Vehicle-specific patterns: 1999 to 2010 Ford 6.8L V10 Triton dominates this code, with cylinder 10 spark plug blowouts (2V engines) and rear-bank harness chafe being the top two causes; 2006 to 2010 BMW M5/M6 S85 has documented injector winding failures past 60k miles; 2003 to 2010 Dodge Viper 8.3L V10 SRT-10 has heat-cracked injector connectors at the rear cylinders. Estimated repair: $60 to $1,050.