P1781 Diagnostic Code on 2001 Chevrolet Heavy Duty with Duramax and Allison Transmission

Model: 2001 Chev Heavyduty Fault Code: P1781 Posted: 2006-11-05 12:32

The check engine light is intermittently triggering on my 2001 Chevrolet Heavy Duty equipped with a Duramax diesel engine and an Allison transmission. The P1781 fault code has been detected, indicating a potential issue with the fuel system or sensor related to the engine control module. I'm seeking input from experienced users who have encountered this specific diagnostic code on similar vehicles. Any insights into possible causes or troubleshooting steps would be greatly appreciated.