#05-06-01-030D: 1.6L L91 INTERMITTENT MISFIRE DURING DECELERATION OR STEADY STATE HIGHWAY DRIVING AFTER COLD START WITH DTCS P0300, P0700, P1781 AND/OR U0401 SET (REPLACE VALVES AND VALVE STEM SEALS) (SEP 12, 2007)
||1.6L L91 Intermittent Misfire During Deceleration or Steady State Highway Driving After Cold Start with DTCs P0300, P0700, P1781 and/or U0401 Set (Replace Valves and Valve Stem Seals)
||2004-2007 Chevrolet Aveo
|2005-2007 Pontiac Wave (Canada Only)
||with Eco-Tec II 1.6L Four Cylinder Engine (VIN 6 – RPO L91)
||Built Prior to VIN Breakpoint 7B797231
This bulletin is being revised to add a VIN Breakpoint to the Models and update the Warranty Information. Please discard Corporate Bulletin Number 05-06-01-030C (Section 06 – Engine).
Some customers may comment on an engine misfire on rare occasions.
Typically, misfires related to this valve sealing concern will be very intermittent.
The intermittent misfires may or may not be felt by the driver and they will normally occur during engine warm up, deceleration, highway driving, wide open throttle acceleration, and/or uphill driving.
Additionally, DTCs P0300, P0700, and/or P1781 (2004 models)/U0401 (2005 models) may be set. If a brief engine misfire occurs, it is possible that a P1781 or U0401 DTC may set without the presence of a DTC P0300.