Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer communications
5Original wording in English
CHEVROLET
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
CHEVROLET
SERVICE ENGINE SOON LIGHT AND ROUGH RUNNING WITH DIAGNOSTIC TROUBLE CODES P0700, P1781 AND POSSIBLY A P0300. *TT
CHEVROLET
DIAGNOSTIC TROUBLE CODE (DTC) P1781 DIAGNOSTIC IS NOT IN SI YET. POOR FUEL ECONOMY AND/OR HARSH TRANSMISSION SHIFTS. SIT BULLETIN 1413084. *MN
CHEVROLET, GMC
INFORMATION ON VEHICLES EXHIBITING DIAGNOSTIC TROUBLE CODE P1781. *TT
Check vehicle applicability
6A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Chevrolet | AVEO ↗ | 2007 |
| Chevrolet | AVEO ↗ | 2006 |
| Chevrolet | AVEO ↗ | 2005 |
| Chevrolet | AVEO ↗ | 2004 |
| Chevrolet | C/K SERIES ↗ | Year unknown |
| GMC | C/K SERIES ↗ | Year unknown |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
4X4 Switch Out of Self Test Range
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.