Discussion:
Error code 77

Unit comes up with check engine light on after several hours of service. Always code 77. Changed out sensor due to wiring rubbed thru. Was good for 3 days. Code 77. Output voltage stays constant , no pulse up and down. I'm assuming that this is a rich signal. Machine has 4435 hours. Was wondering if lp vaporizer is full and needs to be replaced. Is there. Kit available or full replacement ? Will this take care of the rich syndrome or is it best just to hook up the laptop?

Model is a G33P-5 GM 2400 engine. With Woodward lp system
  • Posted 2 Apr 2015 08:15
  • Modified 2 Apr 2015 08:21 by poster
  • By ron_k
  • joined 2 Apr'15 - 109 messages
  • North Dakota, United States

Post your Reply

Forkliftaction accepts no responsibility for forum content and requires forum participants to adhere to our rules of conduct. Click here for more information.

If you are having trouble using the Discussion Forums, please contact us for help.

Movers & Shakers
Pete Stanislawczyk Pete Stanislawczyk
Chief executive officer, East Penn Manufacturing
President, East Penn Manufacturing
APAC vice president, Jungheinrich
Senior VP direct sales and marketing, Daifuku Intralogistics America
Latest job alerts …
Wentzville, MO, United States
Ottumwa, IA, United States
Harrisburg, SD, United States
Upcoming industry events …
July 22-24, 2025 - Sydney, Australia
November 11-13, 2025 - Singapore, Singapore
November 12-13, 2025 - London, United Kingdom
Global Industry News
edition #1235 - 19 June 2025
Greek philosopher Heraclitus is credited with the famous saying “change is the only constant”, and this week’s Forkliftaction News demonstrates this is certainly true in the case of the materials handling sector... Continue reading
Upcoming in the editorial calendar
WIRELESS CHARGING
Aug 2025
MANAGING MIXED FLEETS
Oct 2025