P349B · Herstellerinformationen

CADILLAC, CHEVROLET, GMC · 2020-10-07

This Preliminary information communicates During inspection of the vehicle for an unrelated concern the technician may notice that one or more of the following Cylinder Deactivation Performance DTC(s) P3498, P3499, P349A, P349B, P349C, P349D, P349E, or P349F may be set in history. and not requesting MIL. If any of these DTCs are requesting the MIL, please follow appropriate service information for diagnosis & repair. This condition may be caused by the ECM hardware disabling the cylinder deactivation outputs for an ignition cycle due to low voltage transient during crank & inadvertently causing one of the DTCs to set during an ignition cycle.

CADILLAC, CHEVROLET, GMC · 2020-06-10

This Preliminary information communicates During inspection of the vehicle for an unrelated concern the technician may notice that one or more of the following Cylinder Deactivation Performance DTC(s) P3498, P3499, P349A, P349B, P349C, P349D, P349E, or P349F may be set in history. and not requesting MIL. If any of these DTCs are requesting the MIL, please follow appropriate service information for diagnosis & repair. This condition may be caused by the ECM hardware disabling the cylinder deactivation outputs for an ignition cycle due to low voltage transient during crank & inadvertently causing one of the DTCs to set during an ignition cycle.

MAZDA · 2019-05-29

If you receive a customer complain of lack of power, rough idle, engine noise with stored DTC's P0340:00, P0304:00, P3400:00, P349B:00, and/or P3498:00, perform the following.

MAZDA · 2018-12-06

If you receive a customer complain of lack of power, rough idle, engine noise with stored DTC's P0340:00, P0304:00, P3400:00, P349B:00, and/or P3498:00, perform the following.

CHEVROLET, GMC · 2018-09-06

This Preliminary information communicatesThe vehicle may come into a dealer with a check engine lamp with any of the followingDTC P3498 Cylinder 1 Deactivation Performance DTC P3499 Cylinder 2 Deactivation Performance DTC P349A Cylinder 3 Deactivation Performance DTC P349B Cylinder 4 Deactivation Performance DTC P349C Cylinder 5 Deactivation Performance DTC P349D Cylinder 6 Deactivation Performance DTC P349E Cylinder 7 Deactivation Performance DTC P349F Cylinder 8 Deactivation Performance.A fault with the AFM oil control solenoids causing SES lamp no cylinder deactivation.