DTC U1092 Chevrolet

Description

Engine speed under 4000 rpm, ECT and IAT sensors over 18ºF, BARO sensor over 75 kPa, fuel level over 15%, TP angle change under 1º in 10 ms, and the PCM detected the misfire rate during 200 or 1000 engine revolutions was too high in Cylinder 4 for 5 seconds for 1 second from fuel shutoff. Note: If the misfire is severe, the MIL will flash on off on the 1st trip!