P1320 CHEVROLET – IC Module 4X Reference Circuit Intermittent No Pulses

P1320 CHEVROLET Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light),Engine misfire

P1320 CHEVROLET Possible Causes

Faulty or worn out spark plugs,Faulty fuel injectors,Faulty Camshaft Position Sensor,Faulty Crankshaft Position Sensor

P1320 CHEVROLET Description

With the engine speed over 568 rpm, the Powertrain Control module (PCM) did not receive any 4X Fuel Control pulses for 400 ms.