Possible causes

– Dirty Fuel Injector 1
– Faulty Fuel Injector 1
– Plugged Fuel Injector 1
– Fuel injector 1 harness is open or shorted
– Fuel injector 1 circuit poor electrical connection

Tech notes

Clogged or partially clogged fuel injector can cause this code. Start by performing an injector flush before replacing the injector.

When is the code detected?

The ECM has detected a fault in the fuel injection circuit

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Engine Misfire
– Engine Run Rough
– Low MPG

P0261 FORD Description

Code P0261 is triggered when the Engine Control Module (ECM) detects a low voltage in the Fuel Injector 1 Circuit. During normal conditions the ECM turns the Fuel Injectors ON and OFF in the Fuel Injection System.