P0611 Fuel Injector Control Module Performance — Causes & Fix

What Does P0611 Mean?

P0611 concerns engines that fire their injectors through a dedicated driver module (IDM/FICM). When the module's outputs sag — through internal wear, poor supply feeds or an overloading shorted injector — injection quality collapses, causing rough running, smoke and no-starts. Supply and ground tests come before condemning the module.

P0611 at a Glance

• What it means: The dedicated injector driver module is not performing to specification.
• Most common cause: Injector control module internal fault
• Severity: Moderate to serious — rail-pressure faults cause power loss and non-starts.
• Can you drive?: Short distances in limp mode only. Diagnose promptly.
• Typical repair cost: £40-£150 for sensor/regulator work; £100-£350 per injector where back-leak is the cause.