P0270 MAZDA Fuel Injector Driver Circuit Fault Short To Ground Injector 4

Possible causes
– Dirty Fuel Injector 4
– Faulty Fuel Injector 4
– Plugged Fuel Injector 4
– Fuel injector 4 harness is open or shorted
– Fuel injector 4 circuit poor electrical connection
Tech description
Clogged or partially clogged fuel injector can cause this code. Start by performing an injector flush before replacing the injector.
– Engine Light ON (or Service Engine Soon Warning Light)
– Engine Misfire
– Engine Run Rough
– Low MPG
P0270 MAZDA OBD Code Description

Code P0270 is triggered when the Engine Control Module (ECM) detects a low voltage in the Fuel Injector 4 Circuit. During normal conditions the ECM turns the Fuel Injectors ON and OFF in the Fuel Injection System.

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