# 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.

## Bulletins for this model year that name P1781

- [10017820](https://open.wenmarpro.com/bulletins/10017820), 2005-12-02: 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
- [10011589](https://open.wenmarpro.com/bulletins/10011589), 2005-01-27: SERVICE ENGINE SOON LIGHT ENGINE MISFIRE AND P1781 DIAGNOSTIC TROUBLE CODE. \*EH
- [10009596](https://open.wenmarpro.com/bulletins/10009596), 2004-10-08: SERVICE ENGINE SOON LIGHT AND ROUGH RUNNING WITH DIAGNOSTIC TROUBLE CODES P0700, P1781 AND POSSIBLY A P0300. \*TT
- [10005436](https://open.wenmarpro.com/bulletins/10005436), 2004-02-26: DIAGNOSTIC TROUBLE CODE \(DTC\) P1781 DIAGNOSTIC IS NOT IN SI YET. POOR FUEL ECONOMY AND/OR HARSH TRANSMISSION SHIFTS. SIT BULLETIN 1413084. \*MN