What does code P1266 mean?

Q: What does code P1266 mean?

Cylinder 6 High To Low Side Short. P1266 on Ford vehicles means the powertrain control module (PCM) has detected a short from the high side to the low side of the fuel injector circuit for cylinder 6. The PCM monitors the injector driver circuit and flags this code when the voltage on the high-side control wire is pulled down to the low-side reference, indicating a shorted injector coil or damaged wiring.

DTC codes / Ford codes / P1266

P1266 · FordCylinder 6 High To Low Side Short

P1266 on Ford vehicles means the powertrain control module (PCM) has detected a short from the high side to the low side of the fuel injector circuit for cylinder 6. The PCM monitors the injector driver circuit and flags this code when the voltage on the high-side control wire is pulled down to the low-side reference, indicating a shorted injector coil or damaged wiring.

SystemPowertrain

Code typeFord specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

Guidance is general and written for Ford vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.