P1781 on the 2004 Chevrolet Aveo
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| 050601030 | 2005-12-02. Service bulletin. 1.6L L91 INTERMITTENT MISFIRE COLD DURING DECELERATION OR STEADY STATE HIGHWAY DRIVING AFTER COLD START WITH DTC'S P0300, P0700, P1781 AND/OR U0401 SET (REPLACE VALVES AND VALVE STEM SEALS) *TT UPDATED 11/02/07 *NJ |
|---|---|
| 3064 | 2005-01-27. Service bulletin. SERVICE ENGINE SOON LIGHT ENGINE MISFIRE AND P1781 DIAGNOSTIC TROUBLE CODE. *EH |
| 3064 | 2004-10-08. Service bulletin. SERVICE ENGINE SOON LIGHT AND ROUGH RUNNING WITH DIAGNOSTIC TROUBLE CODES P0700, P1781 AND POSSIBLY A P0300. *TT |
| 01575 | 2004-02-26. Service bulletin. DIAGNOSTIC TROUBLE CODE (DTC) P1781 DIAGNOSTIC IS NOT IN SI YET. POOR FUEL ECONOMY AND/OR HARSH TRANSMISSION SHIFTS. SIT BULLETIN 1413084. *MN |
4 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.