Possible causes

– Large vacuum leak on the engine
– Faulty Manifold Pressure (MAP) sensor
– Faulty Throttle Position Sensor (TPS)
– Faulty Engine Control Module (ECM)

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P2074 JEEP Description

The Engine Control Module (ECM) has detected a failed signal correlation between the Manifold Pressure (MAP) and Throttle Position Sensor (TPS)

JEEP Technical Service Bulletins for P2074 code